U.S. patent application number 16/769734 was filed with the patent office on 2021-06-10 for mobile terminal and implementation method for bandwidth extension to lte band b42.
This patent application is currently assigned to JRD Communication (Shenzhen) LTD.. The applicant listed for this patent is JRD Communication (Shenzhen) LTD.. Invention is credited to Yanbo TANG.
Application Number | 20210175909 16/769734 |
Document ID | / |
Family ID | 1000005429336 |
Filed Date | 2021-06-10 |
United States Patent
Application |
20210175909 |
Kind Code |
A1 |
TANG; Yanbo |
June 10, 2021 |
MOBILE TERMINAL AND IMPLEMENTATION METHOD FOR BANDWIDTH EXTENSION
TO LTE BAND B42
Abstract
A mobile terminal and an implementation method for bandwidth
extension to the LTE band B42 is provided. The mobile terminal
includes: an RF circuit configured to incorporate LTE downlink
three-carrier technology in a 1.7 to 2.7 GHz band, a 4*4 multi-mode
multi-band antenna, and a 256 QAM encoding scheme; a B42
transmitting path and a receiving path is located on the RF
circuit. The B42 transmitting path comprises a B42 RF power
amplifier and a B42 power coupler, which are connected to a
transmission terminal of a primary antenna on the RF circuit. The
receiving path comprises a B42 transceiving filter and a diplexer
that are connected to four antennas of the RF circuit.
Inventors: |
TANG; Yanbo; (Shenzhen City,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
JRD Communication (Shenzhen) LTD. |
Shenzhen City |
|
CN |
|
|
Assignee: |
JRD Communication (Shenzhen)
LTD.
Shenzhen City
CN
|
Family ID: |
1000005429336 |
Appl. No.: |
16/769734 |
Filed: |
December 3, 2018 |
PCT Filed: |
December 3, 2018 |
PCT NO: |
PCT/CN2018/118910 |
371 Date: |
June 4, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04B 1/0057 20130101;
H04B 7/0404 20130101; H04B 1/401 20130101 |
International
Class: |
H04B 1/00 20060101
H04B001/00; H04B 7/0404 20060101 H04B007/0404; H04B 1/401 20060101
H04B001/401 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 4, 2017 |
CN |
201711259329.X |
Claims
1. A mobile terminal for bandwidth extension to the LTE band B42
comprising: an RF circuit configured to incorporate LTE downlink
three-carrier technology in a 1.7 to 2.7 GHz band, a 4*4 multi-mode
multi-band antenna, and a 256 QAM encoding scheme; a B42
transmitting path located on the RF circuit; and a receiving path
located on the RF circuit; wherein the B42 transmitting path is
connected to a primary antenna of the RF circuit, and the receiving
path is connected to four antennas of the RF circuit; the B42
transmitting path comprises: a B42 RF power amplifier and a B42
power coupler, which are connected to a transmission terminal of
the primary antenna on the RF circuit; and the receiving path
comprises: a B42 transceiving filter and a diplexer that are
connected to the four antennas of the RF circuit.
2. The mobile terminal for bandwidth extension to the LTE band B42
of claim 1, wherein the receiving path comprises: a first receiving
path connected to a primary antenna circuit of the RF circuit; a
second receiving path connected to a secondary antenna circuit of
the RF circuit; a third receiving path connected to a first MIMO
antenna circuit of the RF circuit; and a fourth receiving path
connected to a second MIMO antenna circuit of the RF circuit.
3. The mobile terminal for bandwidth extension to the LTE band B42
of claim 2, wherein the first receiving path comprises: a first
diplexer and a first B42 transceiving filter, which are connected
to a transmission terminal of the primary antenna of the RF
circuit; wherein the B42 power coupler is connected between the
first diplexer and the first B42 transceiving filter, and a first
transceiver and an RF switch are connected between the first B42
transceiving filter and the B42 RF power amplifier.
4. The mobile terminal for bandwidth extension to the LTE band B42
of claim 3, wherein the B42 power coupler is further connected to a
second transceiving and RF switch, the second transceiving and RF
switch, the B42 power coupler, and the first diplexer form a
coupling path configured to detect transmission.
5. The mobile terminal for bandwidth extension to the LTE band B42
of claim 2, wherein the second receiving path comprises: a second
diplexer and a second B42 transceiving filter, which are mutually
connected, the second diplexer and the second B42 transceiving
filter are connected to a transmission terminal of a secondary
antenna of the RF circuit.
6. The mobile terminal for bandwidth extension to the LTE band B42
of claim 2, wherein the third receiving path comprises: a mutually
connected third diplexer and a third B42 transceiving filter,
wherein the third diplexer and the third B42 transceiving filter
are connected to a transmission terminal of the first MIMO antenna
of the RF circuit.
7. The mobile terminal for bandwidth extension to the LTE band B42
of claim 2, wherein the fourth receiving path comprises: a mutually
connected fourth diplexer and a fourth B42 transceiving filter,
wherein the fourth diplexer and the fourth B42 transceiving filter
are connected to a transmission terminal of the second MIMO antenna
of the RF circuit.
8. The mobile terminal for bandwidth extension to the LTE band B42
of claim 1, wherein a signal of the B42 band output from the B42 RF
power amplifier passes the B42 transceiving filter and the B42
power coupler, and is transmitted by the primary antenna, a signal
of the B42 band received by the four antennas is divided by the
diplexer, filtered by the B42 transceiving filter, and received by
the RF circuit.
9. A mobile terminal for bandwidth extension to the LTE band B42,
comprising: an RF circuit configured to incorporate LTE downstream
three-carrier technology in a 1.7 to 2.7 GHz band, a 4*4 multi-mode
multi-band antenna design, and a 256 QAM encoding scheme; a B42
transmitting path located on the RF circuit; and a receiving path
located on the RF circuit; wherein the B42 transmitting path
comprises: a B42 RF power amplifier and a B42 power coupler, which
are connected to a transmission terminal of a primary antenna on
the RF circuit; and the receiving path comprises: a B42
transceiving filter and a diplexer, which are connected to four
antennas of the RF circuit.
10. The mobile terminal for bandwidth extension to the LTE band B42
of claim 9, wherein the receiving path comprises: a first receiving
path connected to a primary antenna circuit of the RF circuit; a
second receiving path connected to a secondary antenna circuit of
the RF circuit; a third receiving path connected to a first MIMO
antenna circuit of the RF circuit; and a fourth receiving path
connected to a second MIMO antenna circuit of the RF circuit.
11. The mobile terminal for bandwidth extension to the LTE band B42
of claim 10, wherein the first receiving path comprises: a first
diplexer and a first B42 transceiving filter, which are connected
to a transmission terminal of the primary antenna of the RF
circuit; wherein the B42 power coupler is connected between the
first diplexer and the first B42 transceiving filter, and a first
transceiver and an RF switch are connected between the first B42
transceiving filter and the B42 RF power amplifier.
12. The mobile terminal for bandwidth extension to the LTE band B42
of claim 11, wherein the B42 power coupler is further connected to
a second transceiving and RF switch, the second transceiving and RF
switch, the B42 power coupler and the first diplexer form a
coupling path configured to detect transmission.
13. The mobile terminal for bandwidth extension to the LTE band B42
of claim 10, wherein the second receiving path comprises: a second
diplexer and a second B42 transceiving filter, which are mutually
connected, the second diplexer and the second B42 transceiving
filter are connected to a transmission terminal of a secondary
antenna of the RF circuit.
14. The mobile terminal for bandwidth extension to the LTE band B42
of claim 10, wherein the third receiving path comprises: a mutually
connected third diplexer and a third B42 transceiving filter,
wherein the mutually connected third diplexer and the third B42
transceiving filter are connected to a transmission terminal of the
first MIMO antenna of the RF circuit.
15. The mobile terminal for bandwidth extension to the LTE band B42
of claim 10, wherein the fourth receiving path comprises: a
mutually-connected fourth diplexer and a fourth B42 transceiving
filter, wherein the fourth diplexer and the fourth B42 transceiving
filter are connected to a transmission terminal of the second MIMO
antenna of the RF circuit.
16. The mobile terminal for bandwidth extension to the LTE band B42
of claim 9, wherein a signal of the B42 band output from the B42 RF
power amplifier passes the B42 transceiving filter and the B42
power coupler, and is transmitted by the primary antenna on the RF
circuit, and a signal of the B42 band received by the four antennas
on the RF circuit is divided by the diplexer, filtered by the B42
transceiving filter, and received by the RF circuit.
17. A method for realizing a mobile terminal for bandwidth
extension to a LTE band B42, comprising: configuring a B42
transmitting path and a receiving path located on an RF circuit
incorporating LTE downlink three-carrier technology in a 1.7 to 2.7
GHz band, a 4*4 multi-mode multi-band antenna, and a 256 QAM
encoding scheme; wherein the B42 transmitting path comprises: a B42
RF power amplifier and a B42 power coupler, which are connected to
a transmission terminal of a primary antenna on the RF circuit; and
wherein the receiving path comprises: a B42 transceiving filter and
a diplexer which are connected to the four antennas of the RF
circuit.
18. The method for realizing the mobile terminal for bandwidth
extension to the LTE band B42 of claim 17, wherein the receiving
path comprises: a first receiving path connected to the primary
antenna circuit of the RF circuit; a second receiving path
connected to a secondary antenna circuit of the RF circuit; a third
receiving path connected to a first MIMO antenna circuit of the RF
circuit; and a fourth receiving path connected to a second MIMO
antenna circuit of the RF circuit.
19. The method for realizing the mobile terminal for bandwidth
extension to the LTE band B42 of claim 17, wherein, the first
receiving path includes: a first diplexer and a first B42
transceiving filter, which are connected to the transmission
terminal of the primary antenna of the RF circuit; and wherein the
B42 power coupler is connected between a first diplexer and a first
B42 transceiving filter, and a first transceiver and an RF switch
are connected between the first B42 transceiving filter and a B42
RF power amplifier.
20. The method for realizing the mobile terminal for bandwidth
extension to the LTE band B42 of claim 17, wherein a second
receiving path includes: a second diplexer and a second B42
transceiving filter, which are mutually connected, wherein the
second diplexer and the second B42 transceiving filter are
connected to a transmission terminal of a secondary antenna of the
RF circuit; a third receiving path comprises: a mutually connected
third diplexer and a third B42 transceiving filter, wherein the
third diplexer and the third B42 transceiving filter are connected
to a transmission terminal of a first MIMO antenna of the RF
circuit; and a fourth receiving path comprises: a mutually
connected fourth diplexer and a fourth B42 transceiving filter,
wherein the fourth diplexer and the fourth B42 transceiving filter
are connected to a transmission terminal of a second MIMO antenna
of the RF circuit.
Description
BACKGROUND OF INVENTION
[0001] The disclosure claims priority to Chinese patent application
No. 201711259329.X, titled "MOBILE TERMINAL FOR BANDWIDTH EXPANSION
OF LET B42 BAND AND IMPLEMENTATION METHOD THEREOF", filed with the
National Intellectual Property Administration on Dec. 4, 2017,
which is incorporated by reference in the present application in
its entirety.
FIELD OF INVENTION
[0002] The present invention relates to a technical field of
communication technologies, and more particularly, to a mobile
terminal and an implementation method for bandwidth extension to
the LET band B42.
DESCRIPTION OF PRIOR ART
[0003] Among current technologies, multi-mode multi-band terminal
devices operating in a long-term evolution (LTE) 1.7 to 2.7 GHz
band, such as B1/B2/B3/B4/B7/B30/B66/B39/B41, usually use QUALCOMM
MSM8998+WTR5975 platform chips. The platform can achieve a maximum
download link transmission rate of 1 gigabit per second (Gbps)
through an LTE CAT16 downlink triple carrier multi-input
multi-output (MIMO) technology with dual carrier 4.times.4 MIMO
plus carrier 2.times.2 MIMO and a 256 quadrature amplitude
modulation (QAM) encoding scheme. The platform chip, however, does
not support information transmission in the B42 band and cannot
meet the needs of information reception in a wider band.
[0004] Hence, improvement to current technologies is desired.
SUMMARY OF INVENTION
Technical Problems
[0005] The application embodiment provides a mobile terminal and an
implementation method for bandwidth extension to the LET band B42
to support signal transmission on the B42 band.
Technical Solutions
[0006] An embodiment of the application provides
[0007] A first aspect of the application provides a mobile terminal
for bandwidth extension to the LET band B42 comprising: an RF
circuit configured to incorporate LTE downlink three-carrier
technology in an 1.7 to 2.7 GHz band, a 4*4 multi-mode multi-band
antenna, and a 256 QAM encoding scheme, a B42 transmitting path
located on the RF circuit, and a receiving path located on the RF
circuit.
[0008] The B42 transmitting path is connected to a primary antenna
of the RF circuit, and the receiving path is connected to four
antennas of the RF circuit.
[0009] The B42 transmitting path comprises: a B42 RF power
amplifier (PA) and a B42 power coupler, which are connected to a
transmission terminal of the primary antenna on the RF circuit.
[0010] The receiving path comprises: a B42 transceiving (TRX)
filter and a diplexer that are connected to the four antennas of
the RF circuit.
[0011] In some embodiments, the receiving path comprises: a first
receiving path connected to a primary antenna circuit of the RF
circuit, a second receiving path connected to a secondary antenna
circuit of the RF circuit, a third receiving path connected to a
first MIMO antenna circuit of the RF circuit, and a fourth
receiving path connected to a second MIMO antenna circuit of the RF
circuit.
[0012] In some embodiments, the first receiving path includes:
[0013] a first diplexer and a first B42 transceiving filter, which
are connected to a transmission terminal of the primary antenna of
the RF circuit;
[0014] wherein the B42 power coupler is connected between the first
diplexer and the first B42 transceiving filter, and a first
transceiver and an RF switch are connected between the first B42
transceiving filter and the B42 RF power amplifier.
[0015] In some embodiments, the B42 power coupler is further
connected to a second transceiving and RF switch, the second
transceiving and RF switch, the B42 power coupler and the first
diplexer form a coupling path configured to detect
transmission.
[0016] In some embodiments, the second receiving path includes:
[0017] a second diplexer and a second B42 transceiving filter,
which are mutually connected, the second diplexer and the second
B42 transceiving filter are connected to a transmission terminal of
a secondary antenna of the RF circuit.
[0018] In some embodiments, the third receiving path includes:
[0019] a mutually connected third diplexer and a third B42
transceiving filter, wherein the third diplexer and the third B42
transceiving filter are connected to a transmission terminal of the
first MIMO antenna of the RF circuit.
[0020] In some embodiments, the fourth receiving path includes:
[0021] a mutually connected fourth diplexer and a fourth B42
transceiving filter, wherein the fourth diplexer and the fourth B42
transceiving filter are connected to a transmission terminal of the
second MIMO antenna of the RF circuit.
[0022] In some embodiments, a signal of the B42 band output from
the B42 RF power amplifier passes the B42 transceiving filter and
the B42 power coupler, and is transmitted by the primary antenna; a
signal of the B42 band received by the four antennas is divided by
the diplexer, filtered by the B42 transceiving filter, and received
by the RF circuit.
[0023] A second aspect of the application further provides a mobile
terminal for bandwidth extension to the LET band B42,
comprising:
[0024] an RF circuit configured to incorporate LTE downstream
three-carrier technology in an 1.7 to 2.7 GHz band, a 4*4
multi-mode multi-band antenna design, and a 256 QAM encoding
scheme;
[0025] a B42 transmitting path located on the RF circuit; and
[0026] a receiving path located on the RF circuit;
[0027] wherein the B42 transmitting path comprises: a B42 RF power
amplifier and a B42 power coupler, which are connected to a
transmission terminal of a primary antenna on the RF circuit;
[0028] the receiving path comprises: a B42 transceiving filter and
a diplexer, which are connected to four antennas of the RF
circuit.
[0029] In some embodiments, the receiving path comprises: a first
receiving path connected to a primary antenna circuit of the RF
circuit, a second receiving path connected to a secondary antenna
circuit of the RF circuit, a third receiving path connected to a
first MIMO antenna circuit of the RF circuit, and a fourth
receiving path connected to a second MIMO antenna circuit of the RF
circuit.
[0030] In some embodiments, the first receiving path includes:
[0031] a first diplexer and a first B42 transceiving filter, which
are connected to a transmission terminal of the primary antenna of
the RF circuit;
[0032] the B42 power coupler is connected between the first
diplexer and the first B42 transceiving filter, and a first
transceiver and an RF switch are connected between the first B42
transceiving filter and the B42 RF power amplifier.
[0033] In some embodiments, the B42 power coupler is further
connected to a second transceiving and RF switch, the second
transceiving and RF switch, the B42 power coupler and the first
diplexer form a coupling path configured to detect
transmission.
[0034] In some embodiments, the second receiving path includes:
[0035] a second diplexer and a second B42 transceiving filter,
which are mutually connected, the second diplexer and the second
B42 transceiving filter are connected to a transmission terminal of
a secondary antenna of the RF circuit.
[0036] In some embodiments, the third receiving path includes:
[0037] a mutually connected third diplexer and a third B42
transceiving filter, wherein the third diplexer and the third B42
transceiving filter are connected to a transmission terminal of the
first MIMO antenna of the RF circuit.
[0038] In some embodiments, the fourth receiving path includes:
[0039] a mutually connected fourth diplexer and a fourth B42
transceiving filter, wherein the fourth diplexer and the fourth B42
transceiving filter are connected to a transmission terminal of the
second MIMO antenna of the RF circuit.
[0040] The connected fourth diplexer and the fourth B42
transceiving filter, and the fourth diplexer and the fourth B42
transceiving filter are connected to the transmission terminal of
the second MIMO antenna of the RF circuit.
[0041] In some embodiments, the B42 power coupler is further
connected to a second transceiving and RF switch, the second
transceiving and RF switch, the B42 power coupler and the first
diplexer form a coupling path configured to detect
transmission.
[0042] A third aspect of the application further provides a method
for realizing a mobile terminal for bandwidth extension to the LET
band B42, comprising:
[0043] configuring a B42 transmitting path and a receiving (RX)
path located on an RF circuit incorporating LTE downlink
three-carrier technology in an 1.7 to 2.7 GHz band, a 4*4
multi-mode multi-band antenna, and a 256 QAM encoding scheme;
[0044] the B42 transmitting path comprises: a B42 RF power
amplifier and a B42 power coupler, which are connected to a
transmission terminal of a primary antenna on the RF circuit;
[0045] wherein the receiving path comprises: a B42 transceiving
filter and a diplexer that are connected to the four antennas of
the RF circuit.
[0046] In some embodiments, the receiving path comprises: a first
receiving path connected to a primary antenna circuit of the RF
circuit, a second receiving path connected to a secondary antenna
circuit of the RF circuit, a third receiving path connected to a
first MIMO antenna circuit of the RF circuit, and a fourth
receiving path connected to a second MIMO antenna circuit of the RF
circuit.
[0047] In some embodiments, the first receiving path includes:
[0048] a first diplexer and a first B42 transceiving filter, which
are connected to a transmission terminal of the primary antenna of
the RF circuit;
[0049] the B42 power coupler is connected between the first
diplexer and the first B42 transceiving filter, and a first
transceiver and an RF switch are connected between the first B42
transceiving filter and the B42 RF power amplifier.
[0050] In some embodiments, the second receiving path includes:
[0051] a second diplexer and a second B42 transceiving filter,
which are mutually connected, wherein the second diplexer and the
second B42 transceiving filter are connected to a transmission
terminal of a secondary antenna of the RF circuit.
[0052] The third receiving path comprises:
[0053] a mutually connected third diplexer and a third B42
transceiving filter, wherein the third diplexer and the third B42
transceiving filter are connected to a transmission terminal of the
first MIMO antenna of the RF circuit;
[0054] The fourth receiving path comprises:
[0055] a mutually connected fourth diplexer and a fourth B42
transceiving filter, wherein the fourth diplexer and the fourth B42
transceiving filter are connected to a transmission terminal of the
second MIMO antenna of the RF circuit.
[0056] Useful Effects:
[0057] The application provides a mobile terminal for bandwidth
extension to the LET band B42 and an implementation method. The
mobile terminal comprises: an RF circuit incorporating LTE downlink
triple carrier technology in the 1.7 to 2.7 GHz band, a 4.times.4
multi-mode multi-band antenna design, and the 256 QAM encoding
scheme, a B42 transmitting (TX) path located on the RF circuit and
a receiving path located on the RF circuit. The B42 transmitting
path comprises a B42 RF power amplifier and a B42 power coupler,
which are connected to a transmitting end of the primary antenna on
the RF circuit. The receiving path comprises: a B42 transceiving
filter and a diplexer, which are connected to the four antennas on
the RF circuit, respectively. The mobile terminal provided in the
application supports signal transmission on the B42 band and
facilitates information transmission.
BRIEF DESCRIPTION OF DRAWINGS
[0058] FIG. 1 is a schematic diagram showing a structure of a
mobile terminal for bandwidth extension to the LET band B42
provided in an embodiment of the application.
[0059] FIG. 2 is a schematic diagram of an RF circuit in a mobile
terminal for bandwidth extension to the LET band B42 provided in an
embodiment of the application;
[0060] FIG. 3 is a schematic diagram showing a layout of an antenna
module in the mobile terminal provided in an embodiment of the
application.
[0061] FIG. 4 is a schematic diagram showing a flowchart of an
embodiment of an implementation method for a mobile terminal for
bandwidth extension to the LET band B42 provided in an embodiment
of the application.
[0062] FIG. 5 is a table showing test results of an LTE CAT16
provided in an embodiment of the application under different bands
and different frequency division duplex (FDD)/time division duplex
(TDD) formats.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0063] The following is a clear and comprehensive description of
the technical solutions in the embodiments of the application with
reference to the drawings in the embodiments of the application.
Obviously, the embodiments described are only part of the
application, not for exhaustive illustration. Based on the
embodiments of the application, other embodiments which may be
easily obtained by those having ordinary skills in the art without
paying additional creative effort fall within the scope of the
application for protection.
[0064] The application is a further detailed in the following with
reference to the accompanying drawings and embodiments for
clarification and illustration of the purpose, technical scheme,
and advantages of the application. It should be understood that the
specific embodiments described herein are intended to interpret the
application rather than limit the application.
[0065] The method provided in the application to extend bandwidth
of the mobile terminal to the LET B42 band is detailed in the
following. According to the capabilities of a QUALCOMM SNAPDRAGON
MSM8998 chip, a WTR5975 platform, and the devices' status in the
current industry, the downlink 4*4MIMO design of the 3.4-3.6 GHz
band is verified by selecting the 3GPP-compliant 3.4-3.6 GHz band
B42. The mobile device supports the TD-LTE CAT16 standard using
triple carrier aggregation with two carrier 4*4 MIMO in B42 band
and a single carrier 2*2 MIMO in band B41, that is, CA_41A (2*2
MIMO)-42C (4*4 MIMO). The present application is realized by adding
a B42 supportive RF circuit to a 4G 1.7 to 2.7 GHz multi-mode
multi-band terminal with an antenna path being modified.
[0066] A first embodiment provided in the application is a mobile
terminal for bandwidth extension to the LET band B42. As shown in
FIG. 1, the mobile terminal 10 includes: an RF circuit 110
incorporating LTE downlink triple carrier technology in the 1.7 to
2.7 GHz band, a 4.times.4 multi-mode multi-band antenna design, and
a 256 QAM encoding scheme, a B42 transmitting (TX) path 120 located
on the RF circuit, and a receiving (RX) path 130 located on the RF
circuit.
[0067] With cross reference to FIG. 2, the B42 transmitting path
120 comprises a B42 RF power amplifier (PA) and a B42 power
coupler, which are connected to a transmission terminal of a
primary antenna on the RF circuit. The receiving path 130 comprises
a B42 transceiving (TRX) filter and a diplexer, which are connected
to the four antennas of the RF circuit.
[0068] The B42 transmitting path 120 is used to facilitate
information transmission on the B42 band, and the receiving path on
the four antennas is used to facilitate information receiving on
the B42 band. With cross reference to FIG. 2, in some embodiments,
the B42 transmitting path 120 (B42 TX) is connected to the primary
antenna of the RF circuit. The receiving path is located on the
four antennas of the RF circuit. Specifically, the receiving path
comprises a first receiving path (B42 RX0) connected to the primary
antenna circuit of the RF circuit, and a second receiving path (B42
RX1) connected to a secondary antenna circuit of the RF circuit, a
third receiving path (B42 RX2) connected to a first MIMO antenna
circuit of the RF circuit, and a fourth receiving path (B42 RX3)
connected to a second MIMO antenna circuit of the RF circuit.
[0069] A signal in the B42 band output from the B42 RF power
amplifier, after passing through the B42 transceiving (TRX) filter
and the B42 power coupler, is transmitted by the primary antenna.
The signal in the B42 band is received on the four antennas,
divided by the diplexer, and filtered by the B42 transceiving
filter.
[0070] Specifically, the first receiving path (B42 RX0)
comprises:
[0071] a first diplexer and the first B42 transceiving filter,
which are connected to the transmission terminal of the primary
antenna of the RF circuit. As shown in FIG. 2, the first receiving
path further includes the B42 power coupler and a first
transceiving and RF switch.
[0072] The B42 power coupler is connected between the first
diplexer and the first B42 transceiving filter, and the first
transceiving and RF switch is connected between the first B42
transceiving filter and the B42 RF power amplifier.
[0073] In some embodiments, to obtain a better signal transmission
and reception, the B42 power coupler is further connected with a
second transceiving and RF switch. The second transceiving and RF
switching switch, the B42 power coupler, and the first diplexer
form a coupling path, which is used to detect transmission
radiation.
[0074] In some embodiments, the second receiving path includes:
[0075] a mutually-connected second diplexer and a second B42
transceiving filter. The second diplexer and the second B42
transceiving filter are connected to a transmission terminal of a
secondary antenna of the RF circuit.
[0076] In some embodiments, the third receiving path includes:
[0077] a mutually-connected third diplexer and a third B42
transceiving filter. The third diplexer and the third B42
transceiving filter are connected to a transmission terminal of the
first MIMO antenna of the RF circuit.
[0078] In some embodiments, the fourth receiving path includes:
[0079] a mutually-connected fourth diplexer and a fourth B42
transceiving filter. The fourth diplexer and the fourth B42
transceiving filter are connected to a transmission terminal of the
second MIMO antenna of the RF circuit.
[0080] In one specific embodiment, the arrangement of the antennas
associated with the four receiving paths is modified from the
original 4.times.4 MIMO antennas in the 1.7 to 2.7 GHz band. Each
of the four antennas additionally supports the 3.4-3.6 GHz band,
while maintaining performance on other typical bands. As shown in
FIG. 3, the capability of receiving the B42 band signal is achieved
by modifying layout of the four antennas including the first
receiving path 1, the second receiving path 2, the third receiving
path 3, and the fourth receiving path 4, to provide capability that
support the 3.4-3.6 GHz band.
[0081] A second embodiment provided in the application is an
implementation method for realizing a mobile terminal for extending
B42 band bandwidth. As shown in FIG. 4, the implementation method
includes:
[0082] Step S1: configuring a B42 transmitting path located on an
RF circuit incorporating LTE downlink three-carrier technology in a
1.7 to 2.7 GHz band, a 4*4 multi-mode multi-band antenna, and a 256
QAM encoding scheme;
[0083] Step S2: configuring a receiving path located on the RF
circuit incorporating the LTE downlink three-carrier technology in
the 1.7 to 2.7 GHz band, the 4*4 multi-mode multi-band antenna, and
the 256 QAM encoding scheme;
[0084] Specifically, the B42 transmitting path comprises a B42 RF
power amplifier and a B42 power coupler, which are connected to a
transmission terminal of a primary antenna on the RF circuit.
[0085] The receiving path comprises: a B42 transceiving filter and
a diplexer which are connected to the four antennas of the RF
circuit.
[0086] The receiving path comprises: a first receiving path
connected to a primary antenna circuit of the RF circuit, a second
receiving path connected to a secondary antenna circuit of the RF
circuit, a third receiving path connected to a first MIMO antenna
circuit of the RF circuit, and a fourth receiving path connected to
a second MIMO antenna circuit of the RF circuit.
[0087] Specifically, the first receiving path includes:
a first diplexer and a first B42 transceiving filter, which are
connected to a transmission terminal of the primary antenna of the
RF circuit; the B42 power coupler is connected between the first
diplexer and the first B42 transceiving filter, and a first
transceiver and an RF switch are connected between the first B42
transceiving filter and the B42 RF power amplifier.
[0088] The second receiving path comprises:
a second diplexer and a second B42 transceiving filter, which are
mutually connected. The second diplexer and the second B42
transceiving filter are connected to a transmission terminal of a
secondary antenna of the RF circuit.
[0089] The third receiving path comprises:
[0090] a mutually connected third diplexer and a third B42
transceiving filter, wherein the third diplexer and the third B42
transceiving filter are connected to a transmission terminal of the
first MIMO antenna of the RF circuit.
[0091] The fourth receiving path comprises:
[0092] a mutually connected fourth diplexer and a fourth B42
transceiving filter. The fourth diplexer and the fourth B42
transceiving filter are connected to a transmission terminal of the
second MIMO antenna of the RF circuit.
[0093] With reference to FIG. 5, FIG. 5 is a table showing test
results of an LTE CAT16 provided in an embodiment of the
application under different bands and different frequency division
duplex (FDD)/time division duplex (TDD) formats.
[0094] As shown in FIG. 5, the mobile terminal and the
implementation method provided in the application in the FDD band
can easily achieve 1 Gbps throughput. TDD can achieve different
throughput values with different settings, which all meet the
requirements of the terminal supporting B42 band signal
transmission.
[0095] The application provides a mobile terminal and an
implementation method for bandwidth extension to the LET band B42.
The mobile terminal comprises: an RF circuit incorporating LTE
downlink triple carrier technology in the 1.7 to 2.7 GHz band, a
4.times.4 multi-mode multi-band antenna design, and the 256 QAM
encoding scheme, a B42 transmitting path located on the RF circuit
and a receiving path located on the RF circuit. The B42
transmitting path comprises a B42 RF power amplifier and a B42
power coupler, which are connected to a transmitting end of the
primary antenna on the RF circuit. The receiving path comprises: a
B42 transceiving filter and a diplexer, which are connected to the
four antennas on the RF circuit, respectively. The mobile terminal
provided in the application supports signal transmission on the B42
band and can be achieved though improving the current RF circuit,
which is very simple and satisfies the need for users to transmit
information over larger bandwidths, and facilitates information
transmission between mobile terminals for users.
[0096] It can be appreciated that a person of ordinary skill in the
art may equivalently replace or modify the technical solutions of
the application and the concept of the invention. Any equivalent
replacement or modification based on the technical solutions and
the invention are included in the scope of the accompanying claims
of the invention.
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