U.S. patent application number 13/198163 was filed with the patent office on 2012-05-10 for matching segment circuit to which radio frequency is applied and radio frequency integrated devices using the matching segment circuit.
Invention is credited to Chul Soo Kim, Duck Hwan KIM, Young Il Kim, Jea Shik Shin, In Sang Song.
Application Number | 20120112850 13/198163 |
Document ID | / |
Family ID | 46019067 |
Filed Date | 2012-05-10 |
United States Patent
Application |
20120112850 |
Kind Code |
A1 |
KIM; Duck Hwan ; et
al. |
May 10, 2012 |
MATCHING SEGMENT CIRCUIT TO WHICH RADIO FREQUENCY IS APPLIED AND
RADIO FREQUENCY INTEGRATED DEVICES USING THE MATCHING SEGMENT
CIRCUIT
Abstract
Provided are a matching segment circuit, to which a radio
frequency (RF) is applied, and an RF integrated device using the
matching segment circuit. The matching segment circuit to which an
RF is applied may include an input end connected to a first RF
device, a parallel segment having a first capacitor and a first
inductor connected in parallel, a second inductor connected to the
parallel segment in series, and an output end connected to a second
RF device. The first capacitor, the first inductor, and the second
inductor may be configured so that an impedance of the first RF
device and an impedance of the second RF device may match.
Inventors: |
KIM; Duck Hwan; (Goyang-si,
KR) ; Song; In Sang; (Osan-si, KR) ; Kim; Chul
Soo; (Hwaseong-si, KR) ; Kim; Young Il;
(Suwon-si, KR) ; Shin; Jea Shik; (Hwaseong-si,
KR) |
Family ID: |
46019067 |
Appl. No.: |
13/198163 |
Filed: |
August 4, 2011 |
Current U.S.
Class: |
333/32 |
Current CPC
Class: |
H03H 2007/386 20130101;
H03H 7/38 20130101; H03H 9/54 20130101 |
Class at
Publication: |
333/32 |
International
Class: |
H03H 7/38 20060101
H03H007/38 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 9, 2010 |
KR |
10-2010-0111045 |
Claims
1. A matching segment circuit to which a radio frequency (RF) is
applied, the circuit comprising: an input end connected to a first
RF device; a parallel segment having a first capacitor and a first
inductor connected in parallel; a second inductor connected to the
parallel segment in series; and an output end connected to a second
RF device, wherein the first capacitor, the first inductor, and the
second inductor are configured so that an impedance of the first RF
device and an impedance of the second RF device match.
2. A matching segment circuit to which a radio frequency (RF) is
applied, the circuit comprising: an input end connected to a first
RF device; a parallel segment having a first capacitor and a first
inductor connected in parallel; a second capacitor connected to the
parallel segment in series; and an output end connected to a second
RF device, wherein the first capacitor, the first inductor, and the
second capacitor are configured so that an impedance of the first
RF device and an impedance of the second RF device match.
3. A matching segment circuit to which a radio frequency (RF) is
applied, the circuit comprising: a first matching unit; and a
second matching unit, wherein the first matching unit includes: a
first input end, a first parallel segment, connected to the first
input end, having a first capacitor and a first inductor connected
in parallel, a second inductor connected to the first parallel
segment in series, and a first output end connected to the second
inductor; and the second matching unit includes: a second input
end, a second parallel segment, connected to the second input end,
having a second capacitor and a third inductor connected in
parallel, a third capacitor connected to the second parallel
segment in series, and a second output end connected to the third
capacitor; and the first, second, and third capacitor and first,
second, and third inductor are configured so that an impedance of
at least one RF device connected to an input of the matching
segment circuit matches an impedance of at least one RF device
connected to an output of the matching segment circuit.
4. The circuit of claim 3, wherein the first output end of the
first matching unit and the second input end of the second matching
unit are connected to each other in series.
5. The circuit of claim 3, wherein the first input end of the first
matching unit and the second input end of the second matching unit
are connected to each other in parallel to a first RF device.
6. The circuit of claim 3, wherein the first input end of the first
matching unit is connected to a first RF device, and the second
input end of the second matching unit is connected to a second RF
device.
7. The circuit of claim 3, wherein the first output end of the
first matching unit and the second output end of the second
matching unit are connected to each other in parallel to a third RF
device.
8. The circuit of claim 3, wherein the first output end of the
first matching unit is connected to a third RF device, and the
second output end of the second matching unit is connected to a
fourth RF device.
9. A radio frequency (RF) integrated device using a matching
segment circuit, the device comprising: a first matching unit; and
a first integrated device, connected to the first matching unit,
using a bulk acoustic wave resonator (BAWR) including a second
input end and a second output end, wherein the first matching unit
includes: a first input end, a parallel segment, connected to the
first input end, having a first capacitor and a first inductor
connected to each other in parallel, a second inductor connected to
the parallel segment in series, and a first output end connected to
the second inductor, wherein the first capacitor, the first
inductor, and the second inductor are configured so that an
impedance of the first integrated device matches an impedance of at
least one external RF device connected to the first matching
unit.
10. The device of claim 9, wherein: the first integrated device is
a band-pass filter, the second output end and the second input end
being respectively configured as a single port, and the second
output end is connected to the first input end.
11. The device of claim 9, wherein: the first integrated device is
a band-pass filter, the second output end and the second input end
being respectively configured as a single port, and the second
input end is connected to the first output end.
12. The device of claim 9, further comprising: a second integrated
device, connected to the first matching unit, using a BAWR
including a third output end and a third input end respectively
configured as a single port; and an antenna end to transmit and
receive a signal.
13. The device of claim 12, wherein: the first integrated device is
a receiving filter, the second output end and the second input end
being respectively configured as a single port, the second
integrated device is a transmitting filter, the second input end is
connected to the first output end, and the third input end and the
first input end are connected to the antenna end.
14. A radio frequency (RF) integrated device using a matching
segment circuit, the device comprising: a first matching unit; a
second matching unit; and a first integrated device, connected to
the first and second matching unit, using a bulk acoustic wave
resonator (BAWR) including a third input end and a third output
end, wherein the first matching unit includes: a first input end, a
first parallel segment, connected to the first input end, having a
first capacitor and a first inductor connected in parallel, a
second inductor connected to the first parallel segment in series,
and a first output end connected to the second inductor; and the
second matching unit includes: a second input end, a second
parallel segment, connected to the second input end, having a
second capacitor and a third inductor connected in parallel, a
third capacitor connected to the second parallel segment in series,
and a second output end connected to the third capacitor; and the
first, second, and third capacitor and first, second, and third
inductor are configured so that an impedance of the first
integrated device matches an impedance of at least one external RF
device connected to the first and/or second matching unit.
15. The device of claim 14, wherein the first integrated device is
a band-pass filter including the third output end and the third
input end respectively configured as a single port, and the first
and second input ends are connected to the third output end.
16. The device of claim 14, wherein: the first integrated device is
a balance filter including the third output end and the third input
end respectively configured as a dual port, and the first input end
and the second input end are connected to the third output end.
17. The device of claim 14, wherein the first integrated device is
a band-pass filter including the third output end and the third
input end respectively configured as a single port, and the first
and second output ends are connected to the third input end.
18. The device of claim 14, wherein the first integrated device is
a band-pass filter including the third output end and the third
input end respectively as a dual port, the first and second input
ends are connected to the one external RF device, and the first and
second output ends are connected to the third input end.
19. The device of claim 14, wherein the first output end of the
first matching unit is connected to a first external RF device, and
the second output end of the second matching unit is connected to a
second external RF device.
20. The device of claim 14, wherein the first input end of the
first matching unit is connected to a first external RF device, and
the second input end of the second matching unit is connected to a
second external RF device.
21. The device of claim 14, further comprising: a second integrated
device, connected to the first and/or second matching unit, using a
BAWR including a fourth output end and a fourth input end
respectively configured as a single port; and an antenna end to
transmit and receive a signal.
22. The device of claim 21, wherein: the first integrated device is
a receiving filter, the third output end and the third input end
respectively configured as a dual port, the second integrated
device is a transmitting filter, the third input end is connected
to the first output end and the second output end, and the fourth
input end, the first input end, and the second input end are
connected to the antenna end.
23. A matching segment circuit to match impedances between
connected radio frequency (RF) devices, the circuit comprising: an
input end configured to be connected to at least one RF device; an
output end configured to be connected to at least one other RF
device; a first passive electrical component connected between the
input end and a reference potential; a second passive electrical
component connected between the input end and the output end;
wherein the first and second passive electrical components are
configured to match the impedances between the connected RF
devices.
24. The circuit of claim 23, further comprising a third passive
electrical component connected between the output end and the
reference potential.
25. The circuit of claim 23, wherein the first and second passive
electrical components are capacitors, inductors, or a combination
thereof.
Description
CROSS-REFERENCE TO RELATED APPLICATION(S)
[0001] This application claims the benefit under 35 U.S.C.
.sctn.119(a) of Korean Patent Application No. 10-2010-0111045,
filed on Nov. 9, 2010, in the Korean Intellectual Property Office,
the entire disclosure of which is incorporated herein by reference
for all purposes.
BACKGROUND
[0002] 1. Field
[0003] The following description relates to a matching circuit for
reducing reflections due to an impedance difference between an
input end and an output end, and a radio frequency (RF) integrated
device using the matching circuit.
[0004] 2. Description of Related Art
[0005] In situations in which different radio frequency (RF)
devices are connected to an input end and an output end of a
duplexer or a multiplexer to which an RF is applied, a signal or
power may be reflected due to an impedance difference between the
two different connection ends. As a result, transmission efficiency
may be decreased. In general, the impedance difference between two
different connection ends may be compensated for by a matching
circuit. For example, the impedance difference between two
different connection ends in a conventional bulk acoustic wave
resonator (BAWR) duplexer has been compensated for by using a 1/4
wave length transmission line.
SUMMARY
[0006] In one general aspect, there is provided a matching segment
circuit to which a radio frequency (RF) is applied, the circuit
including an input end connected to a first RF device, a parallel
segment having a first capacitor and a first inductor connected in
parallel, a second inductor connected to the parallel segment in
series, and an output end connected to a second RF device, wherein
the first capacitor, the first inductor, and the second inductor
are configured so that an impedance of the first RF device and an
impedance of the second RF device match.
[0007] In another general aspect, there is provided a matching
segment circuit to which an RF is applied, the circuit including an
input end connected to a first RF device, a parallel segment having
a first capacitor and a first inductor connected in parallel, a
second capacitor connected to the parallel segment in series, and
an output end connected to a second RF device, wherein the first
capacitor, the first inductor, and the second capacitor are
configured so that an impedance of the first RF device and an
impedance of the second RF device match.
[0008] In another general aspect, there is provided a matching
segment circuit to which an RF is applied, the circuit including a
first matching unit, and a second matching unit, wherein the first
matching unit includes a first input end, a first parallel segment,
connected to the first input end, having a first capacitor and a
first inductor connected in parallel, a second inductor connected
to the first parallel segment in series, and a first output end
connected to the second inductor, and the second matching unit
includes a second input end, a second parallel segment, connected
to the second input end, having a second capacitor and a third
inductor connected in parallel, a third capacitor connected to the
second parallel segment in series, and a second output end
connected to the third capacitor, and the first, second, and third
capacitor and first, second, and third inductor are configured so
that an impedance of at least one RF device connected to an input
of the matching segment circuit matches an impedance of at least
one RF device connected to an output of the matching segment
circuit.
[0009] The first output end of the first matching unit and the
second input end of the second matching unit may be connected to
each other in series.
[0010] The first input end of the first matching unit and the
second input end of the second matching unit may be connected to
each other in parallel to a first RF device.
[0011] The first input end of the first matching unit may be
connected to a first RF device, and the second input end of the
second matching unit may be connected to a second RF device.
[0012] The first output end of the first matching unit and the
second output end of the second matching unit may be connected to
each other in parallel to a third RF device.
[0013] The first output end of the first matching unit is connected
to a third RF device, and the second output end of the second
matching unit is connected to a fourth RF device.
[0014] In another general aspect, there is provided an RF
integrated device using a matching segment circuit, the device
including a first matching unit, and a first integrated device,
connected to the first matching unit, using a bulk acoustic wave
resonator (BAWR) including a second input end and a second output
end, wherein the first matching unit includes a first input end, a
parallel segment, connected to the first input end, having a first
capacitor and a first inductor connected to each other in parallel,
a second inductor connected to the parallel segment in series, and
a first output end connected to the second inductor, wherein the
first capacitor, the first inductor, and the second inductor are
configured so that an impedance of the first integrated device
matches an impedance of at least one external RF device connected
to the first matching unit.
[0015] The first integrated device may be a band-pass filter, the
second output end and the second input end may be respectively
configured as a single port, and the second output end may be
connected to the first input end.
[0016] The first integrated device may be a band-pass filter, the
second output end and the second input end may be respectively
configured as a single port, and the second input end may be
connected to the first output end.
[0017] The device may further include a second integrated device,
connected to the first matching unit, using a BAWR including a
third output end and a third input end respectively configured as a
single port, and an antenna end to transmit and receive a
signal.
[0018] The first integrated device may be a receiving filter, the
second output end and the second input end may be respectively
configured as a single port, the second integrated device may be a
transmitting filter, and the second input end may be connected to
the first output end, and the third input end and the first input
end may be connected to the antenna end.
[0019] In another general aspect, there is provided an RF
integrated device using a matching segment circuit, the device
including a first matching unit, a second matching unit; and a
first integrated device, connected to the first and second matching
unit, using a bulk acoustic wave resonator (BAWR) including a third
input end and a third output end, wherein the first matching unit
includes, a first input end, a first parallel segment, connected to
the first input end, having a first capacitor and a first inductor
connected in parallel, a second inductor connected to the first
parallel segment in series, and a first output end connected to the
second inductor, and the second matching unit includes a second
input end, a second parallel segment, connected to the second input
end, having a second capacitor and a third inductor connected in
parallel, a third capacitor connected to the second parallel
segment in series, and a second output end connected to the third
capacitor, and the first, second, and third capacitor and first,
second, and third inductor are configured so that an impedance of
the first integrated device matches an impedance of at least one
external RF device connected to the first and/or second matching
unit.
[0020] The first integrated device may be a band-pass filter
including the third output end and the third input end respectively
configured as a single port, and the first and second input ends
may be connected to the third output end.
[0021] The first integrated device may be a balance filter
including the third output end and the third input end respectively
configured as a dual port, and the first input end and the second
input end may be connected to the third output end.
[0022] The first integrated device is a band-pass filter including
the third output end and the third input end respectively
configured as a single port, and the first and second output ends
are connected to the third input end.
[0023] The first integrated device may be a band-pass filter
including the third output end and the third input end respectively
as a dual port, the first and second input ends may be connected to
the one external RF device, and the first and second output ends
may be connected to the third input end.
[0024] The first output end of the first matching unit may be
connected to a first external RF device, and the second output end
of the second matching unit may be connected to a second external
RF device.
[0025] The first input end of the first matching unit may be
connected to a first external RF device, and the second input end
of the second matching unit may be connected to a second external
RF device.
[0026] The device may further include a second integrated device,
connected to the first and/or second matching unit, using a BAWR
including a fourth output end and a fourth input end respectively
configured as a single port, and an antenna end to transmit and
receive a signal.
[0027] The first integrated device may be a receiving filter, the
third output end and the third input end respectively configured as
a dual port, the second integrated device may be a transmitting
filter, the third input end may be connected to the first output
end and the second output end, and the fourth input end, the first
input end, and the second input end may be connected to the antenna
end.
[0028] In another general aspect, there is provided a matching
segment circuit to match impedances between connected RF devices,
the circuit including an input end configured to be connected to at
least one RF device, an output end configured to be connected to at
least one other RF device, a first passive electrical component
connected between the input end and a reference potential, a second
passive electrical component connected between the input end and
the output end, wherein the first and second passive electrical
components are configured to match the impedances between the
connected RF devices.
[0029] The circuit may further include a third passive electrical
component connected between the output end and the reference
potential.
[0030] The first and second passive electrical components may be
capacitors, inductors, or a combination thereof.
[0031] By using a matching segment circuit to which an RF is
applied, the size of the circuit may be reduced, and an impedance
of an input end and an impedance of an output end different from
the input end may be effectively matched.
[0032] By using a duplexer including a matching segment circuit to
which an RF is applied, a function of the duplexer may be
enhanced.
[0033] By using a small sized RF integrated device, an RF wireless
communication device may be further reduced in size.
[0034] By using a matching segment circuit to which an RF is
applied, an impedance may be effectively matched, thereby reducing
a power loss.
[0035] Other features and aspects may be apparent from the
following detailed description, the drawings, and the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0036] FIGS. 1A and 1B are diagrams illustrating examples of a
matching segment circuit to which a radio frequency (RF) is
applied.
[0037] FIG. 2A through FIG. 4B are diagrams illustrating other
examples of a matching segment circuit to which an RF is
applied.
[0038] FIGS. 5A, 5B, and 5C are diagrams further illustrating
examples of a matching segment circuit to which an RF is
applied.
[0039] FIG. 6A through FIG. 8B are diagrams illustrating examples
of an RF integrated device.
[0040] Throughout the drawings and the detailed description, unless
otherwise described, the same drawing reference numerals will be
understood to refer to the same elements, features, and structures.
The relative size and depiction of these elements may be
exaggerated for clarity, illustration, and convenience.
DETAILED DESCRIPTION
[0041] The following detailed description is provided to assist the
reader in gaining a comprehensive understanding of the methods,
apparatuses, and/or systems described herein. Accordingly, various
changes, modifications, and equivalents of the methods,
apparatuses, and/or systems described herein will be suggested to
those of ordinary skill in the art. Also, description of well-known
functions and constructions may be omitted for increased clarity
and conciseness.
[0042] A matching segment circuit to which a radio frequency (RF)
is applied and an RF integrated device according to various
examples may be included in a mobile device to be utilized in a
wireless mobile communication service field. In more detail, the
matching segment circuit to which an RF is applied and the RF
integrated device may be used as a matching unit for reducing
reflections due to an impedance difference between an output end
and an input end of a device such as, for example, an RF duplexer
or an RF multiplexer.
[0043] The matching segment circuit to which an RF is applied and
the RF integrated device may be used as an external connection unit
or a component of an existing bulk acoustic wave resonator (BAWR)
duplexer for which a matching operation may be employed for an
improved phase characteristic.
[0044] A BAWR may operate through electrodes placed at the top and
the bottom of a piezoelectric layer. In a configuration in which an
RF potential is applied to a top electrode and a bottom electrode,
the piezoelectric layer may vibrate, enabling the BAWR to operate
as a filter.
[0045] The BAWR may correspond to a device for inducing a wave or a
vibration of a predetermined frequency using a resonance
phenomenon, and may be used as a component of an RF device such as,
for example, a filter and an oscillator.
[0046] Throughout the descriptions of the various examples that
follow, the term connection may refer to an electrical connection
through which a signal is transferred. However, it is not necessary
that a physical connection, e.g., wired connection, exists between
the two discussed components. For example, two components may
respectively transmit and receive a signal in a wireless fashion,
yet may still be referred to as being connected.
[0047] FIGS. 1A and 1B illustrate an example of a matching segment
circuit to which an RF is applied.
[0048] Referring to FIGS. 1A and 1B, an example of a matching
segment circuit to which an RF is applied may include an input end
110, a parallel segment 120, a series segment 130, and an output
end 140. The parallel segment 120 and series segment 130 may
include passive electrical components. In the various examples
discussed herein, these passive electrical components are
represented by capacitors and/or inductors. A second inductor 131
may correspond to a component of the series segment 130 in FIG. 1A,
and a second capacitor 133 may correspond to a component of the
series segment 130 in FIG. 1B. The matching segment circuit to
which an RF is applied may correspond to a circuit including a
plurality of matching components for matching an impedance
difference between the input end 110 and the output end 140.
[0049] The input end 110 may be configured as a single input port
and may be connected to an external first RF device. The term
connected as used in this description may not necessarily imply a
physical connection, but rather an electrical connection through
which a current, signal, etc., is passed. The input end 110 may
receive an input of a signal from the first RF device. The parallel
segment 120 may have a configuration in which a first capacitor 121
and a first inductor 123 are connected to each other in parallel.
The series segment 130 may be connected to the parallel segment 120
in series between the input end 110 and the output end 140, and may
include the second inductor 131. In another example, as illustrated
in FIG. 1B, the series segment 130 may include the second capacitor
133. One or more components of the parallel segment 120 and the
series segment 130 may be determined so that an impedance of the
first RF device and an impedance of the second RF device may match.
The output end 140 may be configured by a single output port to be
connected to an external second RF device. The output end 140 may
transfer, to the second RF device, a signal matched through the
parallel segment 120 and the series segment 130.
[0050] An example configuration of the matching segment circuit to
which an RF is applied may be described as follows. In FIG. 1A, one
end of the first capacitor 121 may be connected to the input end
110, and another end of the first capacitor 121 may be connected to
a reference potential. For the purpose of the examples discussed
herein, the other end of the first capacitor 121 will be grounded,
but the examples are not limited thereto. One end of the first
inductor 123 may be connected to the input end 110, and another end
of the first inductor 123 may be connected to the reference
potential, e.g., grounded. One end of the second inductor 131 may
be connected to the parallel segment 120, and another end of the
second inductor 131 may be connected to the output end 140. In FIG.
1B, as in FIG. 1A, one end of the first capacitor 121 may be
connected to the input end 110, and another end of the first
capacitor 121 may be grounded. Also, as previously discussed in
regard to FIG. 1A, in FIG. 1B one end of the first inductor 123 may
be connected to the input end 110, and another end of the first
inductor 123 may be grounded. However, in contrast to the
configuration of FIG. 1A, in FIG. 1B one end of the second
capacitor 133 may be connected to the parallel segment 120, and
another end of the second capacitor 133 may be connected to the
output end 140.
[0051] FIG. 2A through FIG. 4B illustrate other examples of a
matching segment circuit to which an RF is applied.
[0052] Referring to FIGS. 2A, 2B, and 2C, a matching segment
circuit to which an RF is applied according to an example
illustrated in FIG. 2A may include a substantially L-shaped circuit
configured by an input end 210, a capacitor 230, an inductor 240,
and an output end 220. While referred to as an L-shaped circuit in
this and various other examples, and other various examples
discussed later are referred to as having various shapes such as
.pi. or T, it is understood that the circuit examples discussed
herein are not limited to such shapes. Values of the capacitor 230
and the inductor 240 may be determined so that an impedance of a
first RF device connected to the input end 210 and an impedance of
a second RF device connected to the output end 220 may match.
[0053] A matching segment circuit to which an RF is applied
according to an example illustrated in FIG. 2B may include an
L-shaped circuit configured by an input end 210, a capacitor 260,
an inductor 250, and an output end 220. Values of the capacitor 260
and the inductor 250 may be determined so that an impedance of a
first RF device connected to the input end 210 and an impedance of
a second RF device connected to the output end 220 may match.
[0054] A matching segment circuit to which an RF is applied
according to an example illustrated in FIG. 2C may include an
L-shaped circuit configured by an input end 210, a first inductor
270, a second inductor 280, and an output end 220. Values of the
first inductor 270 and the second inductor 280 may be determined so
that an impedance of a first RF device connected to the input end
210 and an impedance of a second RF device connected to the output
end 220 may match.
[0055] Referring to FIGS. 3A and 3B, a matching segment circuit to
which an RF is applied according to an example illustrated in FIG.
3A may include a substantially .pi.-shaped circuit configured by an
input end 310, a first inductor 340, a first capacitor 330, a
second capacitor 350, and an output end 320. Values of the first
inductor 340, the first capacitor 330, and second capacitor 350 may
be determined so that an impedance of a first RF device connected
to the input end 310 and an impedance of a second RF device
connected to the output end 320 may match.
[0056] A matching segment circuit to which an RF is applied
according to an example illustrated in FIG. 3B may include a
substantially T-shaped circuit configured by an input end 310, a
first capacitor 360, a first inductor 370, a second capacitor 380,
and an output end 320. Values of the first capacitor 360, the first
inductor 370, and the second capacitor 380 may be determined so
that an impedance of a first RF device connected to the input end
310 and an impedance of a second RF device connected to the output
end 320 may match.
[0057] Referring to FIGS. 4A and 4B, a matching segment circuit to
which an RF is applied according to an example illustrated in FIG.
4A may include a substantially T-shaped circuit configured by an
input end 410, a first inductor 430, a second inductor 440, a first
capacitor 450, and an output end 420. Values of the first inductor
430, the second inductor 440, and the first capacitor 450 may be
determined so that an impedance of a first RF device connected to
the input end 410 and an impedance of a second RF device connected
to the output end 420 may match.
[0058] A matching segment circuit to which an RF is applied
according to an example illustrated in FIG. 4B may include a
substantially .pi.-shaped circuit configured by an input end 410, a
first inductor 460, a second inductor 480, a first capacitor 470,
and an output end 420. Values of the first inductor 460, the second
inductor 480, and the first capacitor 470 may be determined so that
an impedance of a first RF device connected to the input end 410
and an impedance of a second RF device connected to the output end
420 may match.
[0059] FIGS. 5A, 5B, and 5C illustrate still other examples of a
matching segment circuit 500 to which an RF is applied.
[0060] Referring to FIGS. 5A, 5B, and 5C, the matching segment
circuit 500 to which an RF may be applied may be provided in a
configuration in which any of the example matching segment circuits
illustrated in FIGS. 1A through FIG. 4B, to which an RF is applied,
may be connected in various forms. FIG. 5A illustrates a single
ended type matching segment circuit to which an RF is applied
having an input end of a single port configuration and an output
end also of a single port configuration. FIG. 5B illustrates a
balun type matching segment circuit to which an RF is applied
having an input end of a single port configuration and an output
end of a dual port configuration. FIG. 5C illustrates a balance
type matching segment circuit to which an RF is applied having an
input end of a dual port configuration and an output end of a dual
port configuration. Referring to FIGS. 5A, 5B, and 5C, any of the
example matching segment circuits to which an RF is applied in
FIGS. 1A through FIG. 4B may be provided as a first matching unit
and a second matching unit.
[0061] Referring to FIG. 5A, the matching segment circuit 500 to
which an RF is applied may include a first input end 511, a first
matching unit 510, a first output end 513, a second input end 521,
a second matching unit 520, and a second output end 523. In this
example, any of the example matching segment circuits to which an
RF is applied in FIGS. 1A through FIG. 4B may be provided as the
first matching unit 510 and the second matching unit 520.
[0062] For example, regarding the matching segment circuit 500 of
FIG. 5A, the matching segment circuit to which an RF is applied in
FIG. 1A may be provided as the first matching unit 510, and the
matching segment circuit to which an RF is applied in FIG. 1B may
be provided as the second matching unit 520. In this example, the
first matching unit 510 may include the first input end 511, a
first parallel segment, a second inductor, and the first output end
513, and the second matching unit 520 may include the second input
end 521, a second parallel segment, a third capacitor, and the
second output end 523.
[0063] The first parallel segment may have a configuration in which
a first capacitor and a first inductor are connected to each other
in parallel, and the second inductor may be connected to the first
parallel segment in series between the first input end 511 and the
first output end 513. The second parallel segment may have a
configuration in which a second capacitor and a third inductor are
connected to each other in parallel, and the third capacitor may be
connected to the second parallel segment in series between the
second input end 521 and the second output end 523.
[0064] The first input end 511 may correspond to an input end of
the overall matching segment circuit 500 to which an RF is applied,
and the second output end 523 may correspond to an output end of
the overall matching segment circuit 500 to which an RF is
applied.
[0065] The first input end 511 may be connected to an external
first RF device. The second output end 523 may be connected to a
second RF device. Since the first output end 513 may be connected
to the second input end 521 in series, the second RF device may
correspond to the second matching unit 520. The second input end
521 may be connected to a third RF device. Since the second input
end 521 may be connected to the first output end 513, the third RF
device may correspond to the first matching unit 510. In such an
example configuration, the second output end 523 may be connected
to a fourth RF device.
[0066] In this instance, the first capacitor, the first inductor,
the second inductor, the second capacitor, the third inductor, and
the third capacitor may be determined so that an impedance of the
first RF device connected to the first input end 511 and an
impedance of the fourth RF device connected to the second output
end 523 may match.
[0067] As another example, the matching segment circuit to which an
RF is applied in FIG. 1B may be provided as the first matching unit
510, and the matching segment circuit to which an RF is applied in
FIG. 1A may be provided as the second matching unit 520.
[0068] Referring to FIG. 5B, the matching segment circuit to which
an RF is applied 500 may include an input end 550, a first matching
unit 530, a second matching unit 540, and output ends 533 and 543.
For convenience of description, the output ends 533 and 543 may be
referred to as a first output end 533 and a second output end 543,
and the input end 550 may be referred to as a third input end 550.
Any of the various example matching segment circuits to which an RF
is applied in FIG. 1A through FIG. 4B may be provided as the first
matching unit 530 and the second matching unit 540.
[0069] For example, the matching segment circuit to which an RF is
applied in FIG. 1A may be provided as the first matching unit 530,
and the matching segment circuit to which an RF is applied in FIG.
1B may be provided as the second matching unit 540. In this case,
the first matching unit 530 may include a first input end 531, a
first parallel segment, a second inductor, and a first output end
533, and the second matching unit 540 may include a second input
end 541, a second parallel segment, a third capacitor, and a second
output end 543. The first input end 531 and the second input end
541 may be connected to the third input end 550. A signal inputted
through a single port may be outputted to a dual port through the
first matching unit 530 and the second matching unit 540. The first
output end 533 and the second output end 543 may correspond to
output ends configured by a dual port of the matching segment
circuit 500 to which an RF is applied.
[0070] A first RF device may be connected to the first input end
531 of the first matching unit 530, and a third RF device may be
connected to the second input end 541 of the second matching unit
540. The first and third RF devices may be similar or identical to
a fifth RF device connected to the third input end 550. In another
example, the same signal may be inputted from a single RF device. A
second RF device may be connected to the first output end 533 of
the first matching unit 530, and may be similar or identical to a
fourth RF device that may be connected to the second output end 543
of the second matching unit 540. The matching segment circuit 500
to which an RF is applied may have a balun type configuration in
which a single signal is inputted and two signals are
outputted.
[0071] In this instance, the first capacitor, the first inductor,
the second inductor, the second capacitor, the third inductor, and
the third capacitor may be determined so that an impedance of the
fifth RF device connected to the third input end 550 and an
impedance of the fourth RF device connected to the second output
end 543 may match.
[0072] As another example, the matching segment circuit to which an
RF is applied in FIG. 1B may be provided as the first matching unit
530, and the matching segment circuit to which an RF is applied in
FIG. 1A may be provided as the second matching unit 540.
[0073] Referring to FIG. 5C, the matching segment circuit to which
an RF is applied 500 may include input ends 561 and 571, a first
matching unit 560, a second matching unit 570, and output ends 563
and 573. For a more convenient description, the input ends 561 and
571 may be referred to as a first input end 561 and a second input
end 571, and the output ends 563 and 573 may be referred to as a
first output end 563 and a second output end 573 henceforth. Any of
the example matching segment circuits to which an RF is applied in
FIG. 1A through FIG. 4B may be provided as the first matching unit
560 and the second matching unit 570.
[0074] For example, the matching segment circuit to which an RF is
applied in FIG. 1A may be provided as the first matching unit 560,
and the matching segment circuit to which an RF is applied of FIG.
1B may be provided as the second matching unit 570. In this case,
the first matching unit 560 may include a first input end 561, a
first parallel segment, a second inductor, and a first output end
563, and the second matching unit 570 may include a second input
end 571, a second parallel segment, a third capacitor, and a second
output end 573.
[0075] The first input end 561 and the second input end 571 may
correspond to the input ends configured by a dual port of the
matching segment circuit 500 to which an RF is applied, and the
first output end 563 and the second output end 573 may correspond
to the output ends configured by a dual port of the matching
segment circuit 500 to which an RF is applied.
[0076] A first RF device may be connected to the first input end
561 of the first matching unit 560, and may be similar or identical
to a third RF device that may be connected to the second input end
571 of the second matching unit 570. A second RF device may be
connected to the first output end 563 of the first matching unit
560, and may be similar or identical to a fourth RF device that may
be connected to the second output end 573 of the second matching
unit 570. The matching segment circuit 500 to which an RF is
applied may have a balance type configuration in which two signals
are inputted and two signals are outputted.
[0077] In this instance, the first capacitor, the first inductor,
the second inductor, the second capacitor, the third inductor, and
the third capacitor may be determined so that an impedance of the
first and third RF devices respectively connected to the first
input end 561 and the second input end 571 and an impedance of the
second and fourth RF devices respectively connected to the first
output end 563 and the second output end 573 may match.
[0078] As another example, the matching segment circuit to which an
RF is applied in FIG. 1B may be provided as the first matching unit
560, and the matching segment circuit to which an RF is applied in
FIG. 1A may be provided as the second matching unit 570.
[0079] FIGS. 6A through FIG. 8B illustrate examples of an RF
integrated device.
[0080] FIGS. 6A through 7B illustrate examples in which the RF
integrated device corresponds to an RF filter using a BAWR. In more
detail, FIGS. 6A, 6B, 6C, and 6D illustrate a filter having an
output end and an input end configured by a single port, and FIGS.
7A and 7B illustrate a filter having an output end and an input end
configured by a dual port.
[0081] Referring to FIGS. 6A, 6B, 6C, and 6D, the RF integrated
device 600 may include a first integrated device and a matching
segment. In these examples, any of the various example matching
segment circuits to which an RF is applied in FIGS. 1A through FIG.
5C may be used as the matching segment. FIG. 6A illustrates an
example using a single ended type matching segment having an output
end and an input end configured by a single port. FIG. 6B
illustrates an example using a balun type matching segment having
an input end configured by a single port and an output end
configured by a dual port. FIG. 6C illustrates an example in which
an input end and an output end are configured in a fashion opposite
to the example illustrated in FIG. 6A. Further, FIG. 6D illustrates
an example in which an input end and an output end are configured
in a fashion opposite to the example illustrated in FIG. 6B.
[0082] Referring to FIG. 6A, the RF integrated device 600 may
include a first integrated device 610 and a matching segment
620.
[0083] The first integrated device 610 may include a second input
end 611 configured as a single port, and a second output end 613.
In this example, the first integrated device 610 may correspond to,
for example, a high pass filter (HPF), a low pass filter (LPF), and
a band pass filter (BPF) using a BAWR. The RF integrated device 600
may correspond to a HPF, LPF, and BPF using a BAWR including the
matching segment 620.
[0084] Any of the various example matching segment circuits to
which an RF is applied in FIGS. 1A through FIG. 5C may be used as
the matching segment 620. For example, the matching segment circuit
to which an RF is applied in FIG. 1A may be used as a component of
the matching segment 620. Thus, in such an example, the matching
segment 620 may include a first input end 621, a parallel segment,
a second inductor, and a first output end 623. The second output
end 613 of the RF integrated device 600 and the first input end 621
of the matching segment 620 may be connected to each other in
series.
[0085] In this example, a first capacitor and a first inductor
provided in the parallel segment, and the second inductor connected
to the parallel segment in series, may be determined so that an
impedance of the first integrated device 610 and an impedance of a
second RF device connected to the first output end 623 may
match.
[0086] Referring to FIG. 6B, the RF integrated device 600 may
include a first integrated device 630 and a matching segment
640.
[0087] The first integrated device 630 may include a third input
end 631 configured as a single port and a third output end 633
configured as a single port.
[0088] Any of the example matching segment circuits to which an RF
is applied in FIGS. 1A through FIG. 5C may be used as the matching
segment 640. For example, the matching segment circuit to which an
RF is applied in FIG. 5B may be used as a component of the matching
segment 640. Thus, the matching segment 640 may include a first
matching unit and a second matching unit. In an example in which it
is assumed that the matching segment circuit to which an RF is
applied in FIG. 1A is provided as the first matching unit, and the
matching segment circuit to which an RF is applied in FIG. 1B is
provided as the second matching unit, the first matching unit may
include a first input unit, a first parallel segment, a second
inductor, and a first output end 643, and the second matching unit
may include a second input unit, a second parallel segment, a third
capacitor, and a second output end 645. The first input end and the
second input end may be connected to a fourth input end 641 of the
matching segment 640. The third output end 633 and the fourth input
end 641 may be connected to each other in series. The RF integrated
device 600 may receive a single signal to filter the inputted
signal, in a predetermined frequency band, and output two
signals.
[0089] Referring to FIG. 6C, the RF integrated device 600 may
include a matching segment 650 and a first integrated device 660.
The matching segment 650 may include a first input end 651 and a
first output end 653, and the first integrated device 660 may
include a second input end 661 configured as a single port and a
second output end 663 configured as a single port. The first output
end 653 may be connected to the second input end 661 in series.
FIG. 6C illustrates an example in which locations of the matching
segment and the first integrated device of FIG. 6A are changed, and
further descriptions thereof will be omitted as they follow from
that previously described example.
[0090] Referring to FIG. 6D, the RF integrated device 600 may
include a matching segment 670 and a first integrated device 680.
The matching segment 670 may include a first input end 671, a
second input end 673, and a first output end 675, and the first
integrated device 680 may include a third input end 681 configured
as a single port and a second output end 683 configured as a single
port. The first output end 675 may be connected to the third input
end 681 in series. FIG. 6D illustrates an example in which
locations of the matching segment and the first integrated device
of FIG. 6B are changed, and further descriptions will be omitted as
they follow from that previously described example
[0091] Referring to FIG. 7A and FIG. 7B, an RF integrated device
700 may include a first integrated device and a matching segment.
Any of the various example matching segment circuits to which an RF
is applied in FIGS. 1A through FIG. 5C may be provided as the
matching segment. FIG. 7A illustrates an example using a balance
type matching segment having an output end and an input end which
are both configured as a dual port. FIG. 7B illustrates an example
using a balun type matching segment having an input end of a single
port configuration and an output end of a dual port
configuration.
[0092] Referring to FIG. 7A, the RF integrated device 700 may
include a first integrated device 710 and a matching segment
720.
[0093] The first integrated device 710 may include a third output
end 713 and a third input end 711 respectively configured as a dual
port. In this instance, the first integrated device 710 may
correspond to, for example, a HPF, a LPF, and a BPF using a BAWR.
The first integrated device 710 may correspond to a balance filter.
The balance filter may correspond to a filter for receiving a
balance signal, and transmitting a signal of a predetermined
frequency band. The balance signal may correspond to a signal
including a received signal and a signal having a phase value
opposite to that of the received signal. The balance signal may be
used for minimizing noise of the received signal. The RF integrated
device 700 may correspond to, for example, a HPF, a LPF, and a BPF
using a BAWR including the matching segment 720.
[0094] Any of the various example matching segment circuits to
which an RF is applied in FIGS. 1A through FIG. 5C may be used as
the matching segment 720. For example, the matching segment circuit
of FIG. 5C to which an RF is applied may be used as a component of
the matching segment 720. Thus, the matching segment 720 may
include a first matching unit and a second matching unit. In an
example in which it is assumed that the matching segment circuit to
which an RF is applied in FIG. 1A is provided as the first matching
unit, and the matching segment circuit to which an RF is applied in
FIG. 1B is provided as the second matching unit, the first matching
unit may include a first input end 721, a first parallel segment, a
second inductor, and a first output end 725, and the second
matching unit may include a second input end 723, a second parallel
segment, a third capacitor, and a second output end 727. The third
output end 713 of the first integrated device 710 may be connected
to the first input end 721 and the second input end 723 of the
matching segment 720 in series.
[0095] In this instance, a first capacitor and a first inductor
configuring the first parallel segment, a second inductor connected
to the first parallel segment in series, a second capacitor and a
third inductor configuring the second parallel segment, and a third
capacitor connected to the second parallel segment in series may be
determined so that an impedance of the first integrated device 710
matches an impedance of a second RF device connected to the first
output end 725 and the second output end 727.
[0096] Referring to FIG. 7B, the RF integrated device 700 may
include a matching segment 730 and a first integrated device
740.
[0097] Any of the various example matching segment circuits to
which an RF is applied in FIG. 1A through FIG. 5C may be used as
the matching segment 730. For example, the matching segment circuit
to which an RF is applied in FIG. 5B may be used as a component of
the matching segment 730. Thus, the matching segment 730 may
include a first matching unit and a second matching unit. In an
example in which it is assumed that the matching segment circuit of
FIG. 1A, to which an RF is applied, is then provided as the first
matching unit, and the matching segment circuit of FIG. 1B, to
which an RF is applied, is also provided as the second matching
unit, the first matching unit may include a first input end, a
first parallel segment, a second inductor, and a first output end
733, and the second matching unit may include a second input end, a
second parallel segment, a third capacitor, and a second output end
735. The first input end and the second input end may be connected
to a fourth input end 731.
[0098] The first integrated device 740 may include a third output
end 743 and a third input end 741 respectively configured as a dual
port. The first integrated device 740 may also correspond to a
balance filter.
[0099] The first output end 733 and the second output end 735 of
the matching segment 730 may be connected to the third input end
741. In this instance, a first capacitor and a first inductor
configuring the first parallel segment, a second inductor connected
to the first parallel segment in series, a second capacitor and a
third inductor configuring the second parallel segment, and a third
capacitor connected to the second parallel segment in series may be
determined so that an impedance of the first integrated device 740
matches an impedance of a fifth RF device connected to the fourth
input end 731.
[0100] FIGS. 8A and 8B illustrate examples in which an RF
integrated device corresponds to an RF duplexer.
[0101] In more detail, FIGS. 8A and 8B illustrate examples in which
an RF integrated device corresponds to an RF duplexer 800 using a
BAWR. FIG. 8A illustrates a duplexer including a single ended type
matching segment, a first integrated device having an output end
and an input end configured as a single port, and a second
integrated device having an output end and an input end configured
as a single port. FIG. 8B illustrates a duplexer including a balun
type matching segment, a first integrated device having an output
end and an input end configured as a dual port, and a second
integrated device having an output end and an input end configured
as a single port.
[0102] Referring to FIG. 8A, the RF duplexer 800 may include an
antenna end 810, a matching segment 820, a first integrated device
830, and a second integrated device 840.
[0103] The antenna end 810 may receive a signal from an external
source to transfer the signal to a receiving filter, and may
transmit the transferred signal through a transmitting filter to
the outside.
[0104] Any of the various example matching segment circuits to
which an RF is applied in FIGS. 1A through FIG. 5C may be used as
the matching segment 820. For example, the matching segment circuit
of FIG. 1A to which an RF is applied may be used as a component of
the matching segment 820. Thus, the matching segment 820 may
include a first input end 821, a parallel segment, a second
inductor, and a first output end 823.
[0105] The first integrated device 830 may include a second output
end 833 and a second input end 831 respectively configured as a
single port. In this instance, the first integrated device 830 may
correspond to a receiving filter as a BPF using a BAWR. The first
integrated device 830 may filter a signal received from an external
source through an antenna end 810 in a predetermined frequency
band. The second input end 831 of the first integrated device 830
and the first output end 823 of the matching segment 820 may be
connected to each other in series. The first integrated device 830
may correspond to a transmitting filter.
[0106] The second integrated device 840 may include a third output
end 843 and a third input end 841 configured by a single port. In
this instance, the second integrated device 840 may correspond to a
transmitting filter as a BPF using a BAWR. The second integrated
device 840 may filter a received signal in a predetermined
frequency band to transmit the signal to the outside through the
antenna end 810. The first input end 821 of the matching segment
820 and the third input end 841 of the second integrated device 840
may be connected to the antenna end 810. The second integrated
device 840 may correspond to a receiving filter.
[0107] In this example, a first capacitor and a first inductor
provided in the parallel segment, and a second inductor connected
to the parallel segment in series may be determined so that the
first integrated device 830 and the antenna end 810 may be matched
at a predetermined impedance, the second integrated device 840 and
the antenna end 810 may be matched at a predetermined impedance,
the first integrated device 830 and the second integrated device
840 may be matched at a predetermined impedance, and a phase
difference between a signal passing through the first integrated
device 830 and a signal passing through the second integrated
device 840 may be 180 degrees out of phase.
[0108] Referring to FIG. 8B, the RF duplexer 800 may include an
antenna end 850, a matching segment 860, a first integrated device
870, and a second integrated device 880.
[0109] The antenna end 850 may receive a signal from an external
source to transfer the signal to a receiving filter, and transmit
the transferred signal through a transmitting filter to the
outside.
[0110] Any of the various example matching segment circuits to
which an RF is applied in FIGS. 1A through FIG. 5C may be used as
the matching segment 860. For example, the matching segment circuit
to which an RF is applied in FIG. 5B may be used as a component of
the matching segment 860. Thus, the matching segment 860 may
include a first matching unit and a second matching unit. In an
example in which it is assumed that the matching segment circuit of
FIG. 1A to which an RF is applied, is then provided as the first
matching unit, and the matching segment circuit of FIG. 1B to which
an RF is applied, is provided as the second matching unit, the
first matching unit may include a first input unit, a first
parallel segment, a second inductor, and a first output end 863,
and the second matching unit may include a second input unit, a
second parallel segment, a third capacitor, and a second output end
865. The first input end and the second input end of the respective
first and second matching units may be connected to a fourth input
end 861.
[0111] The first integrated device 870 may include a third output
end 873 and a third input end 871 respectively configured as a dual
port. The first integrated device 870 may correspond, for example,
to a balance filter. In this example, the first integrated device
870 may correspond to a receiving filter as a BPF using a BAWR. The
first integrated device 870 may filter a signal received from an
external source through an antenna end 850 in a predetermined
frequency band. The third input end 871 of the first integrated
device 870 may be connected in series to the first output end 863
and the second output end 865 of the matching segment 860. The
first integrated device 870 may correspond to a transmitting
filter.
[0112] The second integrated device 880 may include a fourth output
end 883 and a fourth input end 881 respectively configured as a
single port. In this example, the second integrated device 880 may
correspond to a transmitting filter as a BPF using a BAWR. The
second integrated device 880 may filter a received signal in a
predetermined frequency band to transmit the signal to the outside
through the antenna end 850. The fourth input end 861 of the
matching segment 860 and the fourth input end 881 of the second
integrated device 880 may be connected to the antenna end 850. The
second integrated device 880 may correspond to a receiving
filter.
[0113] In this instance, a first capacitor and a first inductor
configuring the first parallel segment, a second inductor connected
to the first parallel segment in series, a second capacitor and a
third inductor configuring the second parallel segment, a third
capacitor connected to the second parallel segment in series may be
determined so that the first integrated device 870 and the antenna
end 850 may match at a predetermined impedance, the second
integrated device 880 and the antenna end 850 may match at a
predetermined impedance, the first integrated device 870 and the
second integrated device 880 may match at a predetermined
impedance, and a phase difference between a signal passing through
the first integrated device 870 and a signal passing through the
second integrated device 880 may be 180 degrees out of phase.
[0114] The matching segment circuit to which an RF is applied
according to various examples may be implemented, for example, on a
silicon substrate, a printed circuit board (PCB) substrate, a low
temperature co-fired ceramic (LTCC) substrate, and the like. The
matching segment circuit to which an RF is applied may be
integrated with a device such as, for example, an RF filter, an RF
duplexer, or any combination thereof to be an integrated passive
device in a module form.
[0115] A number of examples have been described above.
Nevertheless, it will be understood that various modifications may
be made. For example, suitable results may be achieved if the
described techniques are performed in a different order and/or if
components in a described system, architecture, device, or circuit
are combined in a different manner and/or replaced or supplemented
by other components or their equivalents. Accordingly, other
implementations are within the scope of the following claims.
* * * * *