U.S. patent application number 09/727780 was filed with the patent office on 2001-08-30 for strain compensation amplifier.
Invention is credited to Himono, Masahiro, Nagano, Terufumi, Sera, Yasuo, Uchida, Takashi.
Application Number | 20010017570 09/727780 |
Document ID | / |
Family ID | 18370464 |
Filed Date | 2001-08-30 |
United States Patent
Application |
20010017570 |
Kind Code |
A1 |
Sera, Yasuo ; et
al. |
August 30, 2001 |
Strain compensation amplifier
Abstract
According to the present invention, there is provided a strain
compensation amplifier which realizes miniaturization, loss
reduction, and cost reduction. In the strain compensation
amplifier, by unifying at least two or more of a power distributor,
a first delay unit, a first power synthesizer, a second delay unit,
a second power synthesizer, a directional coupler, an isolator and
a terminating resistor, the miniaturization, loss reduction, and
cost reduction are realized.
Inventors: |
Sera, Yasuo; (Tokyo, JP)
; Uchida, Takashi; (Tokyo, JP) ; Nagano,
Terufumi; (Tokyo, JP) ; Himono, Masahiro;
(Tokyo, JP) |
Correspondence
Address: |
JACOBSON, PRICE, HOLMAN & STERN
PROFESSIONAL LLIMITED LIABILITY COMPANY
400 Seventh Street, N.W.
Washington
DC
20004
US
|
Family ID: |
18370464 |
Appl. No.: |
09/727780 |
Filed: |
December 4, 2000 |
Current U.S.
Class: |
330/149 ;
330/151 |
Current CPC
Class: |
H03F 1/3229
20130101 |
Class at
Publication: |
330/149 ;
330/151 |
International
Class: |
H03F 001/26 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 3, 1999 |
JP |
11-344591 |
Claims
What is claimed is:
1. A strain compensation amplifier comprising: a strain detection
circuit in which an input signal is distributed by a power
distributor, and a signal obtained by amplifying one output by a
main amplifier via a first variable attenuator and a first variable
phase unit is synthesized with a signal obtained by adjusting a
timing of another output distributed from said power distributor by
a first delay unit by a first power synthesizer to detect a strain
component generated in said main amplifier; and a strain removal
circuit in which a signal obtained by amplifying said strain
component outputted from said first power synthesizer by an
auxiliary amplifier via a second variable attenuator and a second
variable phase unit is reverse-phase synthesized with a signal
obtained by adjusting a timing of a signal outputted from said
first power synthesizer and amplified by the main amplifier by a
second delay unit by a second power synthesizer to offset said
strain component, a monitor output is obtained by a directional
coupler, and a unidirectional property is enhanced by an isolator
to obtain a power synthesis output, wherein at least two or more of
said power distributor, said first delay unit, said first power
synthesizer, said second delay unit, said second power synthesizer,
said directional coupler, said isolator, a terminating resistor of
said second power synthesizer, and the terminating resistor of said
directional coupler are unified.
2. The strain compensation amplifier according to claim 1 wherein
said power distributor and said first delay unit are unified.
3. The strain compensation amplifier according to claim 1 wherein
said first delay unit and said first power synthesizer are
unified.
4. The strain compensation amplifier according to claim 1 wherein
said first power synthesizer and said second delay unit are
unified.
5. The strain compensation amplifier according to claim 1 wherein
said second delay unit and said second power synthesizer are
unified.
6. The strain compensation amplifier according to claim 1 wherein
said second power synthesizer and said directional coupler are
unified.
7. The strain compensation amplifier according to claim 1 wherein
said directional coupler and said isolator are unified.
8. The strain compensation amplifier according to claim 1 wherein
said power distributor, said first delay unit and said first power
synthesizer are unified.
9. The strain compensation amplifier according to claim 1 wherein
said first delay unit, said first power synthesizer and said second
delay unit are unified.
10. The strain compensation amplifier according to claim 1 wherein
said first power synthesizer, said second delay unit and said
second power synthesizer are unified.
11. The strain compensation amplifier according to claim 1 wherein
said second delay unit, said second power synthesizer and said
directional coupler are unified.
12. The strain compensation amplifier according to claim 1 wherein
said second power synthesizer, said directional coupler and said
isolator are unified.
13. The strain compensation amplifier according to claim 1 wherein
said power distributor, said first delay unit, said first power
synthesizer and said second delay unit are unified.
14. The strain compensation amplifier according to claim 1 wherein
said first delay unit, said first power synthesizer, said second
delay unit and said second power synthesizer are unified.
15. The strain compensation amplifier according to claim 1 wherein
said first power synthesizer, said second delay unit, said second
power synthesizer and said directional coupler are unified.
16. The strain compensation amplifier according to claim 1 wherein
said second delay unit, said second power synthesizer, said
directional coupler and said isolator are unified.
17. The strain compensation amplifier according to claim 1 wherein
said power distributor, said first delay unit, said first power
synthesizer, said second delay unit and said second power
synthesizer are unified.
18. The strain compensation amplifier according to claim 1 wherein
said first delay unit, said first power synthesizer, said second
delay unit, said second power synthesizer and said directional
coupler are unified.
19. The strain compensation amplifier according to claim 1 wherein
said first power synthesizer, said second delay unit, said second
power synthesizer, said directional coupler and said isolator are
unified.
20. The strain compensation amplifier according to claim 1 wherein
said power distributor, said first delay unit, said first power
synthesizer, said second delay unit, said second power synthesizer
and said directional coupler are unified.
21. The strain compensation amplifier according to claim 1 wherein
said first delay unit, said first power synthesizer, said second
delay unit, said second power synthesizer, said directional coupler
and said isolator are unified.
22. The strain compensation amplifier according to claim 1 wherein
said power distributor, said first delay unit, said first power
synthesizer, said second delay unit, said second power synthesizer,
said directional coupler and said isolator are unified.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a strain compensation
amplifier for use in a base station, a relay apparatus, and the
like of mobile communication systems such as a car phone, a
cellular phone, and a personal handy phone system, and relates to
miniaturization, loss reduction and cost reduction achieved by
unifying a part of a circuit.
[0003] 2. Description of the Related Art
[0004] A base station and a radio relay apparatus in a car phone, a
cellular phone system, and the like are provided with a
multifrequency common amplifier for simultaneously amplifying a
multifrequency signal. In the multifrequency common amplifier,
linearity needs to be sufficiently improved in order to minimize
occurrence of mutual modulation strain, and a small-size
high-linearity amplifier has been used. As one of the amplifiers, a
strain compensation amplifier (self-adjusting feedforward
amplifier) is used, and constituted in such a manner that the
mutual modulation strain and noise generated in the amplifier are
compensated by self adjustment.
[0005] This strain compensation amplifier is constituted of a
strain detection circuit and a strain removal circuit, the strain
detection circuit including a main amplifier which is a
compensation object amplifier detects a strain component except an
input signal, the detected strain component (error component) is
inputted to the strain removal circuit including an auxiliary
amplifier (error amplifier) to amplify the strain component, and
subsequently negative-phase synthesis with a multifrequency
amplification signal is performed to offset the strain component in
the constitution.
[0006] FIG. 5 is a diagram showing a constitution example of a
conventional strain compensation amplifier. In FIG. 5, numeral 1
denotes an input terminal, 2 denotes a power distributor for
distributing an output of the terminal, 3 denotes a first variable
attenuator, 4 denotes a first variable phase unit, 5 denotes a main
amplifier, 6 denotes a delay line, 7 denotes a first power
synthesizer, 8 denotes a second variable attenuator, 9 denotes a
second variable phase unit, 10 denotes an auxiliary amplifier, 11
denotes a delay filter, 12 denotes a second power synthesizer, 13
denotes a directional coupler, 14 denotes an isolator, 15, 16
denote terminating resistors, 17, 18, 19 denote coaxial cables, 20
denotes an output terminal, 21 denotes a monitor terminal, and 22
denotes a connector.
[0007] An input signal Pin is inputted to the power distributor 2
from the input terminal 1, passed through two branched main lines,
and distributed to the delay line 6 and first variable attenuator
3, and an output of the first variable attenuator 3 is passed
through the first variable phase unit 4 and amplified by the main
amplifier 5. An amplification signal including a strain component
generated during amplification is inputted to the first power
synthesizer 7, and synthesized with the input signal passed through
the main line distributed by the power distributor 2 and the delay
line 6 by the first power synthesizer 7, so that the strain
component is detected.
[0008] The amplification signal outputted from the first power
synthesizer 7 is inputted to the second power synthesizer 12 via
the delay filter 11. On the other hand, the strain component
outputted from the first power synthesizer 7 is passed through the
second variable attenuator 8 and second variable phase unit 9,
amplified by the auxiliary amplifier 10, inputted to the second
power synthesizer 12 so that polarity is reversed, and synthesized
with the amplification signal including the strain component
inputted via the delay filter 11 so that the strain component is
offset, and a common amplification signal with little strain is
outputted. For this output, a monitor output is obtained from the
monitor terminal 21 by the directional coupler 13, a unidirectional
property is enhanced by the isolator 14, and an output signal Pout
is outputted via the output terminal 20. Here, the delay filter 11
and second power synthesizer 12, the second power synthesizer 12
and directional coupler 13, and the directional coupler 13 and
isolator 14 are connected to each other, respectively, via the
connectors 22 and coaxial cables 17, 18, 19, and the terminating
resistors 15, 16 are connected to the second power synthesizer 12
and the directional coupler 13 via the connectors. In this strain
compensation amplifier, the variable attenuators 3, 8, and variable
phase units 4, 9 are adjusted by a pilot signal control and a
desired operation is performed. Additionally, these control systems
are omitted from FIG. 5.
[0009] Moreover, in the conventional power synthesizer, and
directional coupler, a tri-plate structure is generally used in
which an electrode pattern is held between dielectric substrates in
a sandwich manner as shown in FIG. 6. The electrode pattern is
connected to an input/output terminal, and entirely contained in a
shield case. The dielectric used in the tri-plate structure is
slightly larger than air in loss. Furthermore, since the
conventional power synthesizer and directional coupler are
individually contained in the shield cases, a large number of
assembly processes are necessary.
[0010] In the conventional strain compensation amplifier, the power
distributor and delay unit of the strain detection circuit, and the
delay unit, power synthesizer, directional coupler, isolator, and
terminating resistor of the strain removal circuit are constituted
separately from one another, contained separately in the individual
shield cases, and coupled to one another by the connectors and
coaxial cables. Additionally, since the delay filter or the delay
line using the coaxial cable is used in the delay unit, it is
difficult to miniaturize the strain compensation amplifier. For
connection via the connector and coaxial cable, since an operation
space is necessary during assembly, it is further difficult to
miniaturize the amplifier. Furthermore, efficiency enhancement of
the strain compensation amplifier, loss reduction particularly on
and after the first power synthesizer, material cost reduction and
assembly process number reduction and another cost reduction raise
problems.
[0011] In order to miniaturize the strain compensation amplifier,
miniaturization of the strain removal circuit needs to be
performed, and to realize low power consumption, a necessity of
reducing power loss in the strain removal circuit has occurred.
SUMMARY OF THE INVENTION
[0012] An object of the present invention is to solve the
aforementioned problems, and provide a strain compensation
amplifier which realizes miniaturization, loss reduction, and cost
reduction.
[0013] To achieve the aforementioned object, in the strain
compensation amplifier of the present invention, the following
means is used to realize miniaturization, loss reduction, and cost
reduction of the strain compensation amplifier.
[0014] Specifically, according to the present invention, there is
provided a strain compensation amplifier including: a strain
detection circuit in which an input signal is distributed by a
power distributor, and a signal obtained by amplifying one output
by a main amplifier via a first variable attenuator and a first
variable phase unit is synthesized with a signal obtained by
adjusting a timing of another output distributed from the power
distributor by a first delay unit by a first power synthesizer to
detect a strain component generated in the main amplifier; and a
strain removal circuit in which a signal obtained by amplifying the
strain component outputted from the first power synthesizer by an
auxiliary amplifier via a second variable attenuator and a second
variable phase unit is reverse-phase synthesized with a signal
obtained by adjusting a timing of a signal outputted from the first
power synthesizer and amplified by the main amplifier by a second
delay unit by a second power synthesizer to offset the strain
component, a monitor output is obtained by a directional coupler,
and a unidirectional property is enhanced by an isolator to obtain
a power synthesis output, and in this strain compensation
amplifier, at least two or more of the power distributor, the first
delay unit, the first power synthesizer, the second delay unit, the
second power synthesizer, the directional coupler, the isolator, a
terminating resistor of the second power synthesizer, and the
terminating resistor of the directional coupler are unified.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] FIG. 1 is a constitution example diagram of a first
embodiment of a strain compensation amplifier according to the
present invention.
[0016] FIGS. 2A and 2B are diagrams showing an example for
comparing the present invention with a conventional strain
compensation amplifier constitution.
[0017] FIG. 3 is a diagram showing a unified structure example of
the strain compensation amplifier of the present invention.
[0018] FIG. 4 is a constitution example diagram of a second
embodiment of the strain compensation amplifier according to the
present invention.
[0019] FIG. 5 is a constitution example diagram of a conventional
strain compensation amplifier.
[0020] FIG. 6 is a constitution example diagram of a power
distributor, a power synthesizer, and a directional coupler in the
conventional strain compensation amplifier.
[0021] FIG. 7 is a constitution example diagram of a third
embodiment of the strain compensation amplifier according to the
present invention.
[0022] FIG. 8 is a constitution example diagram of a fourth
embodiment of the strain compensation amplifier according to the
present invention.
[0023] FIG. 9 is a constitution example diagram of a fifth
embodiment of the strain compensation amplifier according to the
present invention.
[0024] FIG. 10 is a constitution example diagram of a sixth
embodiment of the strain compensation amplifier according to the
present invention.
[0025] FIG. 11 is a constitution example diagram of a seventh
embodiment of the strain compensation amplifier according to the
present invention.
[0026] FIG. 12 is a constitution example diagram of an eighth
embodiment of the strain compensation amplifier according to the
present invention.
[0027] FIG. 13 is a constitution example diagram of a ninth
embodiment of the strain compensation amplifier according to the
present invention.
[0028] FIG. 14 is a constitution example diagram of a tenth
embodiment of the strain compensation amplifier according to the
present invention.
[0029] FIG. 15 is a constitution example diagram of an eleventh
embodiment of the strain compensation amplifier according to the
present invention.
[0030] FIG. 16 is a constitution example diagram of a twelfth
embodiment of the strain compensation amplifier according to the
present invention.
[0031] FIG. 17 is a constitution example diagram of a thirteenth
embodiment of the strain compensation amplifier according to the
present invention.
[0032] FIG. 18 is a constitution example diagram of a fourteenth
embodiment of the strain compensation amplifier according to the
present invention.
[0033] FIG. 19 is a constitution example diagram of a fifteenth
embodiment of the strain compensation amplifier according to the
present invention.
[0034] FIG. 20 is a constitution example diagram of a sixteenth
embodiment of the strain compensation amplifier according to the
present invention.
[0035] FIG. 21 is a constitution example diagram of a seventeenth
embodiment of the strain compensation amplifier according to the
present invention.
[0036] FIG. 22 is a constitution example diagram of an eighteenth
embodiment of the strain compensation amplifier according to the
present invention.
[0037] FIG. 23 is a constitution example diagram of a nineteenth
embodiment of the strain compensation amplifier according to the
present invention.
[0038] FIG. 24 is a constitution example diagram of a twentieth
embodiment of the strain compensation amplifier according to the
present invention.
[0039] FIG. 25 is a constitution example diagram of a twenty-first
embodiment of the strain compensation amplifier according to the
present invention.
[0040] <Description of Reference Numerals>
[0041] 1 . . . input terminal, 2 . . . power distributor, 3, 8 . .
. variable attenuator, 4, 9 . . . variable phase unit, 5 . . . main
amplifier, 6 . . . delay line, 7, 12 . . . power synthesizer, 10 .
. . auxiliary amplifier, 11 . . . delay filter, 13 . . .
directional coupler, 14, 68 . . . isolator, 15, 16 . . .
terminating resistor, 17, 18, 19 . . . coaxial cable, 20, 67 . . .
output terminal, 21, 66 . . . monitor terminal, 22 . . . connector,
50, 57 . . . unified delay filter, 51, 58, 70 . . . unified power
synthesizer, 52, 71 . . . unified directional coupler, 53, 68 . . .
unified isolator, 54, 55 . . . unified terminating resistor, 56 . .
. unified power distributor, 61 . . . delay filter input terminal,
62 . . . hollow resonator filter, 63 . . . insulator, 64, 65 . . .
terminating resistor fixed with screws to a shield case, 69 . . .
shield case, 72 . . . power synthesizer input terminal
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0042] Embodiments of a strain compensation amplifier according to
the present invention will be described hereinafter with reference
to the drawings. FIG. 1 is a constitution example diagram showing a
first embodiment of the strain compensation amplifier according to
the present invention, and is a constitution example diagram in
which a first power synthesizer output and the subsequent outputs
particularly important in enhancing an efficiency of the strain
compensation amplifier are unified. In FIG. 1 the reference
numerals 1 to 10 and 20 to 22 are similar to those shown in a
conventional constitution diagram of FIG. 5. Numeral 50 denotes a
delay filter (second delay unit) unified according to the present
invention, 51 denotes a unified power synthesizer, 52 denotes a
unified directional coupler, 53 denotes a unified isolator, and 54,
55 denote unified terminating resistors.
[0043] In the present invention, the delay filter, power
synthesizer, directional coupler, isolator, and terminating
resistor, which have heretofore been separate constitutions, are
formed in a unified structure, a connector and coaxial cable for
connecting these to one another become unnecessary, and
miniaturization and cost reduction are realized. Specifically, a
space of the connector and coaxial cable, and an operation space
for connecting the connector to a coaxial cable plug are
unnecessary so that miniaturization is realized, the aforementioned
structure can result in structure simplification and assembly
process number reduction, and further the expensive connector and
coaxial cable for a high frequency are unnecessary so that the cost
reduction can be realized.
[0044] FIG. 2 is a diagram showing an example for comparing the
conventional constitution with the constitution of the first
embodiment of the present invention in outer dimension and power
loss. In the constitution of the first embodiment of the present
invention, an outer dimension for coaxial cable lengths W1, W2, W3
can be shortened, and losses W11, W12, W13 for the coaxial cables
can be reduced. For example, since in a 2 GHz band the length of
each coaxial cable is 4 cm and each loss is about 0.1 dB, the
reduction of the outer dimension of 12 cm and loss of about 0.3 dB
for three coaxial cables can be realized. Furthermore, in the
conventional constitution, a dispersion of a delay amount by
dispersions of the cable lengths W1, W2, W3 during manufacture of
the coaxial cables has been a problem, but the present invention
obviates a necessity of the coaxial cables, and it is therefore
easy to manage the delay amount. Moreover, in the conventional
constitution it has been general to use a tri-plate structure using
a dielectric substrate in the power distributor, power synthesizer,
and directional coupler, but in the present invention, a conductor
wire in air is disposed in the vicinity, cost reduction is
therefore possible with a simple structure, and additionally the
loss can be reduced by the loss of the dielectric.
[0045] FIG. 3 is a diagram showing a unified structure example of
the strain compensation amplifier according to the first embodiment
of the present invention. Numeral 61 denotes a hollow resonator
filter input terminal, 62 denotes a hollow resonator filter, 63
denotes an insulator, 64, 65 denote terminating resistors, 66
denotes a monitor terminal, 67 denotes an output terminal, 68
denotes an isolator, 69 denotes a shield case, 70 denotes a unified
power synthesizer, 71 denotes a unified directional coupler, and 72
denotes a power synthesizer input terminal.
[0046] In the first embodiment of the present invention, the hollow
resonator filter 62, power synthesizer 70, directional coupler 71,
and isolator 68 are successively connected, connected portions are
insulated by the unified shield case 69 and insulator 63 of Teflon
or the like, and the shield case 69 is structured and unified in
such a manner that chambers divided by functions are disposed to
bring about a shield effect. Therefore, as compared with a
conventional case in which the components are individually
contained in the shield cases, one shield case can be used.
Therefore, for example, when a shield case mold is prepared,
instead of three molds, one mold is sufficient, which can depress a
material cost. The hollow resonator filter for use in the present
invention can be miniaturized with a higher use frequency.
Specifically, a predetermined number of filters are necessary in
order to obtain a constant delay amount, but with a higher
frequency a wavelength becomes shorter, and even with the same
number of filters the miniaturization can be realized. Moreover,
since the terminating resistors 64, 65 are directly fixed to the
shield case with screws, a heat dissipation effect can be
enhanced.
[0047] FIG. 4 is a constitution example diagram showing a second
embodiment of the strain compensation amplifier according to the
present invention. In FIG. 4 the reference numerals 1, 3 to 5, 8 to
10, 20 to 22 are similar to those shown in the conventional
constitution diagram of FIG. 5. Moreover, the reference numerals 51
to 55 are similar to those shown in the constitution example
diagram of the first embodiment of the present invention of FIG. 2.
Numeral 50 denotes a unified second delay filter (delay unit), 56
denotes a unified power distributor, 57 denotes a unified first
delay filter (delay nit), and 58 denotes a unified first power
synthesizer.
[0048] In the second embodiment of the present invention, the power
distributor, first delay unit, first power synthesizer, second
delay unit, second power synthesizer, directional coupler,
isolator, and terminating resistor, which have heretofore been
separate constitutions, are formed in the unified structure, the
connector and coaxial cable for connecting these to one another
become unnecessary, and the miniaturization and cost reduction are
further realized as compared with the first embodiment.
[0049] Additionally, in the constitution of the first embodiment,
the second delay unit, second power synthesizer, directional
coupler, isolator, and terminating resistor are unified, while in
the constitution of the second embodiment, the power distributor,
first delay unit, first power synthesizer, second delay unit,
second power synthesizer, directional coupler, isolator, and
terminating resistor are unified in the shown example. However, in
the present invention, the unification is not necessarily limited
to the aforementioned combinations, and by unifying at least two or
more of the power distributor, first delay unit, first power
synthesizer, second delay unit, second power synthesizer,
directional coupler, isolator, and terminating resistor, the object
of the present invention can be achieved.
[0050] Various unified combinations will concretely be described
hereinafter. To facilitate the description, it is assumed in the
description that the terminating resistor has already been
unified.
[0051] First, with respect to a case in which adjacent two
constitutions of the power distributor, first delay unit, first
power synthesizer, second delay unit, second power synthesizer,
directional coupler and isolator are unified, third to eighth
embodiments will be described with reference to the constitution
example diagrams of FIGS. 7 to 12. Additionally, in FIGS. 7 to 12,
a state is shown in which the terminating resistor is unified, but
the terminating resistor may not be unified.
[0052] For the strain compensation amplifier according to the third
embodiment of the present invention, as shown in FIG. 7, the power
distributor and first delay unit in the strain detection circuit
are unified, the circuit is constituted of the unified power
distributor 56 and unified first delay unit 57, the connector and
coaxial cable for connecting these to each other become
unnecessary, and other constitutions (numerals 1, 3 to 5, 7 to 14,
20 to 22) are also shown in the conventional constitution diagram
of FIG. 5.
[0053] For the strain compensation amplifier according to the
fourth embodiment of the present invention, as shown in FIG. 8, the
first delay unit and first power synthesizer in the strain
detection circuit are unified, the circuit is constituted of the
unified delay unit 57 and unified first power synthesizer 58, the
connector and coaxial cable for connecting these units to each
other become unnecessary, and the other constitutions (numerals 1
to 5, 8 to 14, 20 to 22) are also shown in the conventional
constitution diagram of FIG. 5.
[0054] For the strain compensation amplifier according to the fifth
embodiment of the present invention, as shown in FIG. 9, the power
synthesizer and second delay unit in the strain removal circuit are
unified, the circuit is constituted of the unified first power
synthesizer 58 and unified second delay unit 50, the connector and
coaxial cable for connecting these units to each other become
unnecessary, and the other constitutions (numerals 1 to 6, 8 to 10,
12 to 14, 20 to 22) are also shown in the conventional constitution
diagram of FIG. 5.
[0055] For the strain compensation amplifier according to the sixth
embodiment of the present invention, as shown in FIG. 10, the
second delay unit and second power synthesizer in the strain
removal circuit are unified, the circuit is constituted of the
unified second delay unit 50 and unified second power synthesizer
51, the connector and coaxial cable for connecting these units to
each other become unnecessary, and the other constitutions
(numerals 1 to 10, 13 and 14, 20 to 22) are also shown in the
conventional constitution diagram of FIG. 5.
[0056] For the strain compensation amplifier according to the
seventh embodiment of the present invention, as shown in FIG. 11,
the second power synthesizer and directional coupler in the strain
removal circuit are unified, the circuit is constituted of the
unified second power synthesizer 51 and unified directional coupler
52, the connector and coaxial cable for connecting these units to
each other become unnecessary, and the other constitutions
(numerals 1 to 11, 14, 20 to 22) are also shown in the conventional
constitution diagram of FIG. 5.
[0057] For the strain compensation amplifier according to the
eighth embodiment of the present invention, as shown in FIG. 12,
the directional coupler and isolator in the strain removal circuit
are unified, the circuit is constituted of the unified directional
coupler 52 and unified isolator 53, the connector and coaxial cable
for connecting these units to each other become unnecessary, and
the other constitutions (numerals 1 to 12, 20 to 22) are also shown
in the conventional constitution diagram of FIG. 5.
[0058] Next, with respect to a case in which adjacent three
constitutions of the power distributor, first delay unit, first
power synthesizer, second delay unit, second power synthesizer,
directional coupler, and isolator are unified, ninth to thirteenth
embodiments will be described with reference to the constitution
example diagrams of FIGS. 13 to 17. Additionally, in FIGS. 13 to
17, the state is shown in which the terminating resistor is
unified, but the terminating resistor may not be unified.
[0059] For the strain compensation amplifier according to the ninth
embodiment of the present invention, as shown in FIG. 13, the power
distributor, first delay unit and first power synthesizer in the
strain detection circuit are unified, the circuit is constituted of
the unified power distributor 56, unified first delay unit 57 and
unified first power synthesizer 58, the connector and coaxial cable
for connecting these to one another become unnecessary, and the
other constitutions (numerals 1, 3 to 5, 8 to 14, 20 to 22) are
also shown in the conventional constitution diagram of FIG. 5.
[0060] For the strain compensation amplifier according to the tenth
embodiment of the present invention, as shown in FIG. 14, the first
delay unit and first power synthesizer in the strain detection
circuit and the second delay unit in the strain removal circuit are
unified, the amplifier is constituted of the unified first delay
unit 57, unified first power synthesizer 58 and unified second
delay unit 50, the connector and coaxial cable for connecting these
to one another become unnecessary, and the other constitutions
(numerals 1 to 5, 8 to 10, 12 to 14, 20 to 22) are also shown in
the conventional constitution diagram of FIG. 5.
[0061] For the strain compensation amplifier according to the
eleventh embodiment of the present invention, as shown in FIG. 15,
the first power synthesizer, second delay unit and second power
synthesizer in the strain removal circuit are unified, the circuit
is constituted of the unified first power synthesizer 58, unified
second delay unit 50 and unified second power synthesizer 51, the
connector and coaxial cable for connecting these to one another
become unnecessary, and the other constitutions (numerals 1 to 6, 8
to 10, 13 and 14, 20 to 22) are also shown in the conventional
constitution diagram of FIG. 5.
[0062] For the strain compensation amplifier according to the
twelfth embodiment of the present invention, as shown in FIG. 16,
the second delay unit, second power synthesizer and directional
coupler in the strain removal circuit are unified, the circuit is
constituted of the unified second delay unit 50, unified second
power synthesizer 51 and unified directional coupler 52, the
connector and coaxial cable for connecting these to one another
become unnecessary, and the other constitutions (numerals 1 to 10,
14, 20 to 22) are also shown in the conventional constitution
diagram of FIG. 5.
[0063] For the strain compensation amplifier according to the
thirteenth embodiment of the present invention, as shown in FIG.
17, the second power synthesizer, directional coupler and isolator
in the strain removal circuit are unified, the circuit is
constituted of the unified second power synthesizer 51, unified
directional coupler 52 and unified isolator 53, the connector and
coaxial cable for connecting these to one another become
unnecessary, and the other constitutions (numerals 1 to 11, 20 to
22) are also shown in the conventional constitution diagram of FIG.
5.
[0064] Next, with respect to a case in which adjacent four
constitutions of the power distributor, first delay unit, first
power synthesizer, second delay unit, second power synthesizer,
directional coupler and isolator are unified, fourteenth to
sixteenth embodiments will be described with reference to the
constitution example diagrams of FIGS. 18 to 20. Additionally, in
FIGS. 18 to 20, the state is shown in which the terminating
resistor is unified, but the terminating resistor may not be
unified.
[0065] For the strain compensation amplifier according to the
fourteenth embodiment of the present invention, as shown in FIG.
18, the power distributor, first delay unit and first power
synthesizer in the strain detection circuit and the second delay
unit in the strain removal circuit are unified, the amplifier is
constituted of the unified power distributor 56, unified first
delay unit 57, unified first power synthesizer 58 and unified
second delay unit 50, the connector and coaxial cable for
connecting these to one another become unnecessary, and the other
constitutions (numerals 1, 3 to 5, 8 to 10, 12 to 14, 20 to 22) are
also shown in the conventional constitution diagram of FIG. 5.
[0066] For the strain compensation amplifier according to the
fifteenth embodiment of the present invention, as shown in FIG. 19,
the first delay unit and first power synthesizer in the strain
detection circuit and the second delay unit and second power
synthesizer in the strain removal circuit are unified, the
amplifier is constituted of the unified delay unit 57, unified
first power synthesizer 58, unified second delay unit 50 and
unified second power synthesizer 51, the connector and coaxial
cable for connecting these to one another become unnecessary, and
the other constitutions (numerals 1 to 5, 8 to 10, 13 and 14, 20 to
22) are also shown in the conventional constitution diagram of FIG.
5.
[0067] For the strain compensation amplifier according to the
sixteenth embodiment of the present invention, as shown in FIG. 20,
the first power synthesizer, second delay unit, second power
synthesizer and directional coupler in the strain removal circuit
are unified, the amplifier is constituted of the unified first
power synthesizer 58, unified second delay unit 50, unified second
power synthesizer 51 and unified directional coupler 52, the
connector and coaxial cable for connecting these to one another
become unnecessary, and the other constitutions (numerals 1 to 6, 8
to 10, 14, 20 to 22) are also shown in the conventional
constitution diagram of FIG. 5.
[0068] Additionally, a constitution in which the second delay unit,
second power synthesizer, directional coupler and isolator in the
strain removal circuit are unified corresponds to the first
embodiment shown in FIG. 1.
[0069] Next, with respect to a case in which adjacent five
constitutions of the power distributor, first delay unit, first
power synthesizer, second delay unit, second power synthesizer,
directional coupler and isolator are unified, seventeenth to
nineteenth embodiments will be described with reference to the
constitution example diagrams of FIGS. 21 to 23. Additionally, in
FIGS. 21 to 23, the state is shown in which the terminating
resistor is unified, but the terminating resistor may not be
unified.
[0070] For the strain compensation amplifier according to the
seventeenth embodiment of the present invention, as shown in FIG.
21, the power distributor, first delay unit and first power
synthesizer in the strain detection circuit and the second delay
unit and second power synthesizer in the strain removal circuit are
unified, the amplifier is constituted of the unified power
distributor 56, unified first delay unit 57, unified first power
synthesizer 58, unified second delay unit 50 and unified second
power synthesizer 51, the connector and coaxial cable for
connecting these to one another become unnecessary, and the other
constitutions (numerals 1, 3 to 5, 8 to 10, 13 and 14, 20 to 22)
are also shown in the conventional constitution diagram of FIG.
5.
[0071] For the strain compensation amplifier according to the
eighteenth embodiment of the present invention, as shown in FIG.
22, the first delay unit and first power synthesizer in the strain
detection circuit and the second delay unit, second power
synthesizer and directional coupler in the strain removal circuit
are unified, the amplifier is constituted of the unified first
delay unit 57, unified first power synthesizer 58, unified second
delay unit 50, unified second power synthesizer 51 and unified
directional coupler 52, the connector and coaxial cable for
connecting these to one another become unnecessary, and the other
constitutions (numerals 1 to 5, 8 to 10, 14, 20 to 22) are also
shown in the conventional constitution diagram of FIG. 5.
[0072] For the strain compensation amplifier according to the
nineteenth embodiment of the present invention, as shown in FIG.
23, the first power synthesizer in the strain detection circuit and
the second delay unit, second power synthesizer, directional
coupler and isolator in the strain removal circuit are unified, the
amplifier is constituted of the first delay unit 57, unified first
power synthesizer 58, unified second delay unit 50, unified second
power synthesizer 51, unified directional coupler 52 and unified
isolator 53, the connector and coaxial cable for connecting these
to one another become unnecessary, and the other constitutions
(numerals 1 to 6, 8 to 10, 20 to 22) are also shown in the
conventional constitution diagram of FIG. 5.
[0073] Next, with respect to a case in which adjacent six
constitutions of the power distributor, first delay unit, first
power synthesizer, second delay unit, second power synthesizer,
directional coupler and isolator are unified, twentieth and
twenty-first embodiments will be described with reference to the
constitution example diagrams of FIGS. 24 and 25. Additionally, in
FIGS. 24 and 25, the state is shown in which the terminating
resistor is unified, but the terminating resistor may not be
unified.
[0074] For the strain compensation amplifier according to the
twentieth embodiment of the present invention, as shown in FIG. 24,
the power distributor, first delay unit and first power synthesizer
in the strain detection circuit and the second delay unit, second
power synthesizer and directional coupler in the strain removal
circuit are unified, the amplifier is constituted of the unified
power distributor 56, unified first delay unit 57, unified first
power synthesizer 58, unified second delay unit 50, unified second
power synthesizer 51 and unified directional coupler 52, the
connector and coaxial cable for connecting these to one another
become unnecessary, and the other constitutions (numerals 1, 3 to
5, 8 to 10, 14, 20 to 22) are also shown in the conventional
constitution diagram of FIG. 5.
[0075] For the strain compensation amplifier according to the
twenty-first embodiment of the present invention, as shown in FIG.
25, the first delay unit and first power synthesizer in the strain
detection circuit and the second delay unit, second power
synthesizer, directional coupler and isolator in the strain removal
circuit are unified, the amplifier is constituted of the unified
first delay unit 57, unified first power synthesizer 58, unified
second delay unit 50, unified second power synthesizer 51, unified
directional coupler 52 and unified isolator 53, the connector and
coaxial cable for connecting these to one another become
unnecessary, and the other constitutions (numerals 1 to 5, 8 to 10,
20 to 22) are also shown in the conventional constitution diagram
of FIG. 5.
[0076] Moreover, a constitution in which all the seven
constitutions of the power distributor, first delay unit, first
power synthesizer, second delay unit, second power synthesizer,
directional coupler and isolator are unified corresponds to the
second embodiment shown in FIG. 3.
[0077] As described above, according to the strain compensation
amplifier of the present invention, by unifying at least two or
more of the power distributor, first delay unit, first power
synthesizer, second delay unit, second power synthesizer,
directional coupler, isolator, second power synthesizer terminating
resistor and directional coupler terminating resistor, and
obviating the necessity of the conventional connector and coaxial
cable for connecting the respective components to one another, the
following effects can be obtained.
[0078] Firstly, the power loss by the connector and coaxial cable
can be reduced.
[0079] Secondly, the cost of the connector and coaxial cable can be
reduced.
[0080] Thirdly, the space of the connector and coaxial cable, and
operation space for connecting the connector and coaxial cable
become unnecessary and the simplification and miniaturization of
the structure can be realized.
[0081] Fourthly, because of the unified structure the material cost
and assembly process number can be reduced.
[0082] Fifthly, the power distributor, power synthesizer and
directional coupler can be simple in structure and satisfactory in
properties, and can easily be adjusted.
[0083] Sixthly, the dispersion of delay amount by the dispersion of
coaxial cable length can be depressed.
* * * * *