CN216437156U - Substrate matching circuit, radio frequency power amplifier and radio frequency chip - Google Patents
Substrate matching circuit, radio frequency power amplifier and radio frequency chip Download PDFInfo
- Publication number
- CN216437156U CN216437156U CN202122838800.9U CN202122838800U CN216437156U CN 216437156 U CN216437156 U CN 216437156U CN 202122838800 U CN202122838800 U CN 202122838800U CN 216437156 U CN216437156 U CN 216437156U
- Authority
- CN
- China
- Prior art keywords
- inductor
- capacitor
- matching circuit
- receiving
- ninth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/56—Modifications of input or output impedances, not otherwise provided for
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Transmitters (AREA)
Abstract
The utility model provides a substrate matching circuit, which comprises a transmitting matching circuit, a first receiving matching circuit and a second receiving matching circuit, wherein the first receiving matching circuit is connected with the transmitting matching circuit respectively, and adapts to the isolation degree of a power amplification signal transmitting end and a first receiving signal end; the second receiving matching circuit is adaptive to the isolation between the power amplification signal transmitting end and the second receiving signal end, and the isolation between the power amplification signal transmitting end and the receiving signal is enhanced while the power amplification signal transmitting end is filtered through the substrate, so that the filtering effect, the loss and the isolation of the signal in the substrate matching circuit during transmitting and receiving are balanced, and the reliability is better. The utility model also provides a radio frequency power amplifier and radio frequency chip. Compared with the prior art, the utility model discloses a base plate matching circuit, radio frequency power amplifier and radio frequency chip transmission suitability are good, and is small, low in production cost.
Description
Technical Field
The utility model relates to a wireless communication technology field especially relates to a base plate matching circuit, radio frequency power amplifier and radio frequency chip.
Background
The filtering, the isolation degree and the transmission loss are used as important indexes of a substrate of the CMOS power amplifier, and the linear response capability of the substrate matching circuit to large signals is influenced.
The existing traditional substrate matching circuit design is still fixed for simultaneously considering the three fields, but the performance improvement aspect can not achieve a better effect. Therefore, the effects of signal filtering, isolation and transmission loss need to be improved again.
SUMMERY OF THE UTILITY MODEL
Not enough to above correlation technique, the utility model provides a filtering effect, loss, isolation are more excellent in order to reach balance, transmission suitability is good, small low in production cost's base plate matching circuit, radio frequency power amplifier and radio frequency chip.
In order to solve the above technical problem, an embodiment of the present invention provides a substrate matching circuit, including a transmitting matching circuit, a first receiving matching circuit and a second receiving matching circuit, which are respectively connected to the transmitting matching circuit;
the transmission matching circuit comprises a first inductor, a second inductor, a third inductor, a fourth inductor, a ninth inductor, a tenth inductor, an eleventh inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a fifth capacitor;
the first end of the first inductor is connected to the voltage of a battery, and is connected to the ground after being connected with the first capacitor in series; the second end of the first inductor is used as an input and connected to a power amplification signal transmitting end, and is connected to the first end of the second inductor;
the second end of the second inductor is connected to the first end of the second capacitor and the first end of the third capacitor respectively;
a second end of the second capacitor is connected to ground, and second ends of the third capacitors are respectively connected to a first end of the third inductor and a first end of the fourth inductor;
a first end of the third inductor is connected to ground, and a second end of the fourth inductor is connected to a first end of the ninth inductor;
a second end of the ninth inductor is connected to a first end of the fifth capacitor and a first end of the tenth inductor respectively;
a second end of the fifth capacitor is connected to ground, a second end of the tenth inductor is used as an output for connecting an external antenna, and a second end of the tenth inductor is connected to ground after being connected in series with the eleventh inductor;
the first receiving matching circuit comprises a fifth inductor, a sixth inductor, a seventh inductor, an eighth inductor, a sixth capacitor, a seventh capacitor, an eighth capacitor and a first switch;
the second end of the fifth inductor is connected to the first end of the ninth inductor, and the first end of the fifth inductor is connected in series with the sixth inductor and then serves as a first receiving signal end; the first end of the fifth inductor is connected with the sixth capacitor in series and then is connected to the ground;
a second end of the seventh inductor and a second end of the eighth inductor are both connected to a first end of the fifth inductor; a first end of the seventh inductor is connected in series with the seventh capacitor and then connected to the power amplification signal transmitting end, and a first end of the eighth inductor is connected in series with the eighth capacitor and then connected to the power amplification signal transmitting end;
the first switch is connected between the ground and the second end of the seventh capacitor in series;
the second receiving matching circuit comprises a ninth inductor, a twelfth inductor, a thirteenth inductor, a fourteenth inductor, a fifteenth inductor, a ninth capacitor, a tenth capacitor and a second switch;
a second end of the ninth capacitor is connected to a second end of the ninth inductor, and first ends of the ninth capacitor and the thirteenth inductor are respectively connected to a first end of the twelfth inductor, a first end of the thirteenth inductor, a first end of the fourteenth inductor, and a first end of the fifteenth inductor;
a second end of the twelfth inductor is used as a second receiving signal end, a second end of the thirteenth inductor is connected to ground, a second end of the fourteenth inductor is connected to the power amplification signal transmitting end after being connected in series with the tenth capacitor, and a second end of the fifteenth inductor is connected to a second end of the fourteenth inductor;
the second switch is connected in series between ground and the second end of the tenth capacitor.
Preferably, the substrate matching circuit is formed on a substrate.
Preferably, the fifth inductor and the sixth capacitor constitute a low-pass filter.
Preferably, the thirteenth inductor and the ninth capacitor constitute a high-pass filter.
The embodiment of the utility model provides a still provide a radio frequency power amplifier, include like the embodiment of the utility model provides an above-mentioned base plate matching circuit.
The embodiment of the utility model provides a still provide a radio frequency chip, radio frequency chip includes like the embodiment of the utility model provides an above-mentioned radio frequency power amplifier.
Compared with the prior art, the utility model discloses an among base plate matching circuit, radio frequency power amplifier and the radio frequency chip, by the transmission matching circuit, respectively with the first receiving matching circuit and the second receiving matching circuit that the transmission matching circuit is connected constitute jointly, wherein, the fifth inductance and the sixth electric capacity in the first receiving matching circuit constitute low pass filter, realize the isolation of adaptation power amplification signal transmitting terminal and first received signal end through adjusting the fifth inductance; the thirteenth inductor and the ninth capacitor in the second receiving matching circuit form a high-pass filter, and the ninth capacitor is adjusted to adapt the isolation between the power amplification signal transmitting end and the second receiving signal end, so that the isolation between the power amplification signal transmitting end and the receiving signal is enhanced while the power amplification signal is filtered by the substrate, the isolation between the first receiving signal and the second receiving signal is enhanced, the loss in signal transmitting and receiving is reduced, the filtering effect, the loss and the isolation of the signals in the substrate matching circuit in the signal transmitting and receiving process are balanced, and the reliability is better.
Drawings
The present invention will be described in detail with reference to the accompanying drawings. The foregoing and other aspects of the invention will become more apparent and more readily appreciated from the following detailed description, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 is a schematic diagram of the substrate matching circuit structure provided by the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
The embodiments/examples set forth herein are specific embodiments of the present invention and are presented for illustrative purposes only, and are not intended to be construed as limitations on the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include those which make any obvious replacement or modification of the embodiments described herein, and all of which are within the scope of the present invention.
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. The directional terms used in the present disclosure, such as upper, lower, front, rear, left, right, inner, outer, side, etc., refer only to the directions of the attached drawings. Accordingly, the directional terms used are used for describing and understanding the present invention, and are not used for limiting the present invention.
Referring to fig. 1, an embodiment of the present invention provides a substrate matching circuit 100, which includes a transmitting matching circuit 1, a first receiving matching circuit 2 and a second receiving matching circuit 3 respectively connected to the transmitting matching circuit 1. In this embodiment, the substrate matching circuit 100 is formed on a substrate.
Specifically, the transmission matching circuit 1 includes a first inductor L1, a second inductor L2, a third inductor L3, a fourth inductor L4, a ninth inductor L9, a tenth inductor L10, an eleventh inductor L11, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5.
A first end of the first inductor L1 is connected to the battery voltage Vbatt, and is connected to the ground after being connected in series with the first capacitor C1; a second terminal of the first inductor L1 is connected as an input to a power amplified signal transmitting terminal pa (tx), and is connected to a first terminal of the second inductor L2.
The second end of the second inductor L2 is connected to the first end of the second capacitor C2 and the first end of the third capacitor C3, respectively.
The second terminal of the second capacitor C2 is connected to ground, and the second terminal of the third capacitor C3 is connected to the first terminal of the third inductor L3 and the first terminal of the fourth inductor L4, respectively.
A first terminal of the third inductor L3 is connected to ground, and a second terminal of the fourth inductor L4 is connected to a first terminal of the ninth inductor L9.
A second terminal of the ninth inductor L9 is connected to the first terminal of the fifth capacitor C5 and the first terminal of the tenth inductor L10, respectively.
A second terminal of the fifth capacitor C5 is connected to ground, a second terminal of the tenth inductor L10 is used as an output for connecting an external antenna, and a second terminal of the tenth inductor L10 is connected to ground after being connected in series with the eleventh inductor L11.
The first receiving matching circuit 2 includes a fifth inductor L5, a sixth inductor L6, a seventh inductor L7, an eighth inductor L8, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, and a first switch.
A second end of the fifth inductor L5 is connected to a first end of the ninth inductor L9, and a first end of the fifth inductor L5 is connected in series with the sixth inductor L6 to serve as a first receiving signal end; and the first end of the fifth inductor L5 is connected to ground after being connected in series with the sixth capacitor C6.
A second terminal of the seventh inductor L7 and a second terminal of the eighth inductor L8 are both connected to a first terminal of the fifth inductor L5; a first end of the seventh inductor L7 is connected to the power amplification signal transmitting terminal Pa after being connected in series with the seventh capacitor C7, and a first end of the eighth inductor L8 is connected to the power amplification signal transmitting terminal Pa after being connected in series with the eighth capacitor C8.
The first switch is connected in series between the ground and the second end of the seventh capacitor C7.
The second receiving matching circuit 3 comprises a ninth inductor L9, a twelfth inductor L12, a thirteenth inductor L13, a fourteenth inductor L14, a fifteenth inductor L15, a ninth capacitor C9, a tenth capacitor C10 and a second switch;
a second end of the ninth capacitor C9 is connected to a second end of the ninth inductor L9, and first ends of the ninth capacitor C9 are respectively connected to a first end of the twelfth inductor L12, a first end of the thirteenth inductor L13, a first end of the fourteenth inductor L14, and a first end of the fifteenth inductor L15;
a second end of the twelfth inductor L12 is used as a second receiving signal end, a second end of the thirteenth inductor L13 is connected to ground, a second end of the fourteenth inductor L14 is connected in series with the tenth capacitor C10 and then connected to the power amplification signal transmitting end Pa, and a second end of the fifteenth inductor L15 is connected to a second end of the fourteenth inductor L14.
The second switch is connected in series between ground and the second end of the tenth capacitor C10.
The fifth inductor L5 and the sixth capacitor C6 form a low-pass filter. The thirteenth inductor L13 and the ninth capacitor C9 constitute a high-pass filter.
The utility model discloses an among the base plate matching circuit 100, when input/output signal transmission, fifth inductance L5 constitutes low pass filter with sixth electric capacity C6 to can go the transmission signal Tx of adaptation power amplification signal transmission end Pa and the first received signal Rx 1's of first received signal end Rx1 PIN signal isolation degree through adjusting fifth inductance L5. The thirteenth inductor L13 and the ninth capacitor C9 form a high-pass filter, and the ninth capacitor C9 is adjusted to adapt the signal isolation between the transmission signal Tx at the power amplification signal transmission end Pa and the second reception signal Rx2 at the first reception signal end Rx1 PIN. The input and output impedance is controlled at 50 omega by adjusting the step-by-step LC matching unit to change the frequency, so that the transmission loss is reduced.
When the ANT signal at the antenna end reaches the first receiving signal end Rx1, the fifth inductor L5 and the sixth capacitor C6 form a low-pass filter to filter high frequency, and the seventh inductor L7 and the seventh capacitor C7, and the eighth inductor L8 and the eighth capacitor C8 form resonance to filter a specific frequency point.
When the ANT signal at the antenna end reaches the second receiving signal end Rx2, the ninth capacitor C9, the twelfth inductor L12 and the thirteenth inductor L13 form a high-pass filter to filter low frequencies, and the fourteenth inductor L14, the fifteenth inductor L15 and the tenth capacitor C10 form resonance to filter specific frequency points.
Therefore, the signal process the utility model discloses an strengthen the isolation of power amplification signal Tx and received signal (Rx1 Rx1) in the time of above-mentioned base plate matching circuit 100 to and the isolation between first received signal Rx1 and the second received signal Rx2, loss when reducing signal transmission and receiving, make the signal when transmission and receiving filter effect in base plate matching circuit, loss, isolation reach a balance, the reliability is more excellent, the transmission suitability is good, small low in production cost.
The substrate matching circuit solves the problems of signal filtering, isolation between signal transmission and signal reception, signal transmission loss and signal transmission adaptation faced by the signal during transmission and reception. Meanwhile, the transmission adaptation problem of the signal transmission and reception in the substrate matching circuit is obviously improved while the substrate area is greatly reduced and the production cost is reduced.
The embodiment of the utility model provides a still provide a radio frequency power amplifier, include like the embodiment of the utility model provides an above-mentioned base plate matching circuit.
The embodiment of the utility model provides a still provide a radio frequency chip, radio frequency chip includes like the embodiment of the utility model provides an above-mentioned radio frequency power amplifier.
Compared with the prior art, the utility model discloses an among base plate matching circuit, radio frequency power amplifier and the radio frequency chip, by the transmission matching circuit, respectively with the first receiving matching circuit and the second receiving matching circuit that transmission matching circuit is connected constitute jointly, wherein, fifth inductance L5 and sixth electric capacity C6 among the first receiving matching circuit constitute low pass filter, realize the isolation of adaptation power amplification signal transmitting terminal and first received signal end through adjusting fifth inductance L5; the thirteenth inductor L13 and the ninth capacitor C9 in the second receiving matching circuit form a high-pass filter, and the isolation between the power amplification signal transmitting end and the second receiving signal end is adapted by adjusting the ninth capacitor C9, so that the isolation between the power amplification signal transmitting end and the receiving signal is enhanced while the power amplification signal transmitting signal is filtered by the substrate, and the isolation between the first receiving signal and the second receiving signal is enhanced, the loss during signal transmitting and receiving is reduced, the filtering effect, the loss and the isolation of the signal in the substrate matching circuit during transmitting and receiving are balanced, and the reliability is better.
It should be noted that the above-mentioned embodiments described with reference to the drawings are only intended to illustrate the present invention and not to limit the scope of the present invention, and those skilled in the art should understand that modifications or equivalent substitutions made on the present invention without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, unless the context indicates otherwise, words that appear in the singular include the plural and vice versa. Additionally, all or a portion of any embodiment may be utilized with all or a portion of any other embodiment, unless stated otherwise.
Claims (6)
1. A substrate matching circuit is characterized by comprising a transmitting matching circuit, a first receiving matching circuit and a second receiving matching circuit, wherein the first receiving matching circuit and the second receiving matching circuit are respectively connected with the transmitting matching circuit;
the transmitting matching circuit comprises a first inductor, a second inductor, a third inductor, a fourth inductor, a ninth inductor, a tenth inductor, an eleventh inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a fifth capacitor;
the first end of the first inductor is connected to the voltage of a battery, and is connected to the ground after being connected with the first capacitor in series; the second end of the first inductor is used as an input and connected to a power amplification signal transmitting end, and is connected to the first end of the second inductor;
the second end of the second inductor is connected to the first end of the second capacitor and the first end of the third capacitor respectively;
a second end of the second capacitor is connected to ground, and second ends of the third capacitors are respectively connected to a first end of the third inductor and a first end of the fourth inductor;
a first end of the third inductor is connected to the ground, and a second end of the fourth inductor is connected to a first end of the ninth inductor;
a second end of the ninth inductor is connected to a first end of the fifth capacitor and a first end of the tenth inductor respectively;
a second end of the fifth capacitor is connected to ground, a second end of the tenth inductor is used as an output for connecting an external antenna, and a second end of the tenth inductor is connected to ground after being connected in series with the eleventh inductor;
the first receiving matching circuit comprises a fifth inductor, a sixth inductor, a seventh inductor, an eighth inductor, a sixth capacitor, a seventh capacitor, an eighth capacitor and a first switch;
the second end of the fifth inductor is connected to the first end of the ninth inductor, and the first end of the fifth inductor is connected in series with the sixth inductor and then serves as a first receiving signal end; the first end of the fifth inductor is connected with the sixth capacitor in series and then is connected to the ground;
a second end of the seventh inductor and a second end of the eighth inductor are both connected to a first end of the fifth inductor; a first end of the seventh inductor is connected in series with the seventh capacitor and then connected to the power amplification signal transmitting end, and a first end of the eighth inductor is connected in series with the eighth capacitor and then connected to the power amplification signal transmitting end;
the first switch is connected between the ground and the second end of the seventh capacitor in series;
the second receiving matching circuit comprises a ninth inductor, a twelfth inductor, a thirteenth inductor, a fourteenth inductor, a fifteenth inductor, a ninth capacitor, a tenth capacitor and a second switch;
a second end of the ninth capacitor is connected to a second end of the ninth inductor, and first ends of the ninth capacitor and the thirteenth inductor are respectively connected to a first end of the twelfth inductor, a first end of the thirteenth inductor, a first end of the fourteenth inductor, and a first end of the fifteenth inductor;
a second end of the twelfth inductor is used as a second receiving signal end, a second end of the thirteenth inductor is connected to ground, a second end of the fourteenth inductor is connected to the power amplification signal transmitting end after being connected in series with the tenth capacitor, and a second end of the fifteenth inductor is connected to a second end of the fourteenth inductor;
the second switch is connected in series between ground and the second end of the tenth capacitor.
2. The substrate matching circuit of claim 1, wherein the substrate matching circuit is formed on a substrate.
3. The substrate matching circuit of claim 1, wherein the fifth inductor and the sixth capacitor comprise a low pass filter.
4. The substrate matching circuit of claim 1, wherein the thirteenth inductor and the ninth capacitor constitute a high pass filter.
5. A radio frequency power amplifier comprising the substrate matching circuit of any of claims 1-4.
6. A radio-frequency chip, characterized in that the radio-frequency chip comprises the radio-frequency power amplifier according to any one of claim 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122838800.9U CN216437156U (en) | 2021-11-18 | 2021-11-18 | Substrate matching circuit, radio frequency power amplifier and radio frequency chip |
| PCT/CN2022/125448 WO2023088002A1 (en) | 2021-11-18 | 2022-10-14 | Substrate matching circuit, radio frequency power amplifier, and radio frequency chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122838800.9U CN216437156U (en) | 2021-11-18 | 2021-11-18 | Substrate matching circuit, radio frequency power amplifier and radio frequency chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216437156U true CN216437156U (en) | 2022-05-03 |
Family
ID=81339735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122838800.9U Active CN216437156U (en) | 2021-11-18 | 2021-11-18 | Substrate matching circuit, radio frequency power amplifier and radio frequency chip |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN216437156U (en) |
| WO (1) | WO2023088002A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023088002A1 (en) * | 2021-11-18 | 2023-05-25 | 深圳飞骧科技股份有限公司 | Substrate matching circuit, radio frequency power amplifier, and radio frequency chip |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002271104A (en) * | 2001-03-12 | 2002-09-20 | Tdk Corp | High-frequency signal switching device and antenna multicoupler using the same |
| US8073401B2 (en) * | 2009-02-17 | 2011-12-06 | Rfaxis, Inc. | Multi mode radio frequency transceiver front end circuit with inter-stage matching circuit |
| US9923530B2 (en) * | 2015-11-25 | 2018-03-20 | Mediatek Inc. | Matching network circuit and radio-frequency power amplifier with odd harmonic rejection and even harmonic rejection and method of adjusting symmetry of differential signals |
| CN110784185B (en) * | 2019-11-11 | 2023-08-01 | 北京普能微电子科技有限公司 | Power amplifier, output matching circuit and radio frequency module |
| CN110932747B (en) * | 2019-12-02 | 2020-08-21 | 翱捷智能科技(上海)有限公司 | Integrated high-performance radio frequency transmit-receive switch |
| CN216437156U (en) * | 2021-11-18 | 2022-05-03 | 深圳飞骧科技股份有限公司 | Substrate matching circuit, radio frequency power amplifier and radio frequency chip |
-
2021
- 2021-11-18 CN CN202122838800.9U patent/CN216437156U/en active Active
-
2022
- 2022-10-14 WO PCT/CN2022/125448 patent/WO2023088002A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023088002A1 (en) * | 2021-11-18 | 2023-05-25 | 深圳飞骧科技股份有限公司 | Substrate matching circuit, radio frequency power amplifier, and radio frequency chip |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023088002A1 (en) | 2023-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101673865B (en) | A barron device manufactured by using integrated passive component process | |
| CN107017913B (en) | A kind of RF transmit-receive circuit | |
| US11121694B2 (en) | Multiplexer | |
| CN101882941A (en) | Device and equipment for quadruple-frequency transceiving of global mobile communication system | |
| CN105428808A (en) | Antenna and terminal for transmitting and/or receiving multi-frequency-range wireless signals | |
| CN113872532B (en) | Coupling circuit applied to 4G full-band power amplifier and electronic equipment | |
| CN216437156U (en) | Substrate matching circuit, radio frequency power amplifier and radio frequency chip | |
| WO2023040475A1 (en) | Dual-microstrip-line coupler, power amplifier, related device and chip | |
| CN107257016A (en) | A kind of terminal multi-antenna structure and mobile terminal | |
| CN210780743U (en) | Radio frequency circuit for solving 2.4G interference 5G wireless performance | |
| CN105656436A (en) | CMOS power amplifier matching circuit | |
| CN208939929U (en) | RF front end structure and mobile terminal | |
| CN219041780U (en) | Matching circuit of NFC antenna | |
| CN210469352U (en) | Signal processing device and antenna equipment | |
| CN108172956A (en) | A kind of microwave combiner | |
| CN107293832A (en) | A kind of four-port microstrip line duplexer | |
| CN102570065B (en) | Dual-station multiplexing Balen antenna | |
| CN109167605A (en) | RF front end structure and mobile terminal | |
| CN206272580U (en) | Directive overrurrent relay coupler and RF front-end module | |
| CN213905562U (en) | Cavity duplexer with additional zero point introduced | |
| CN102412859B (en) | Mixed radio-frequency duplexer based on discrete device | |
| CN210274079U (en) | Miniaturized multifrequency section LTE 4G antenna | |
| JP2005503710A (en) | RF signal switch for wireless communication device | |
| CN209517079U (en) | A kind of VHF-UHF duplexer | |
| CN107078369A (en) | Front-end circuit and communicator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |