CN114337710A - Gain switching circuit for receiving radio frequency signal and radio frequency receiver - Google Patents
Gain switching circuit for receiving radio frequency signal and radio frequency receiver Download PDFInfo
- Publication number
- CN114337710A CN114337710A CN202210217842.7A CN202210217842A CN114337710A CN 114337710 A CN114337710 A CN 114337710A CN 202210217842 A CN202210217842 A CN 202210217842A CN 114337710 A CN114337710 A CN 114337710A
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistor
- gain
- switch
- connecting end
- 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.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The application discloses a gain switching circuit and a radio frequency receiver for receiving radio frequency signals. The gain circuit comprises a first connection end, a second connection end, a third connection end, a fourth connection end, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6. Because the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5 and the resistor R6 are connected in series and parallel to form a four-port network, the four-port network replaces an SPDT switch of a gain switching circuit in the prior art, and switching control of radio frequency gain can be realized. The gain switching circuit has the advantages of simple circuit structure, high circuit stability, good port standing wave, high fault tolerance rate and low cost, and is beneficial to large-scale production.
Description
Technical Field
The invention relates to the technical field of communication test instruments and meters, in particular to a gain switching circuit and a radio frequency receiver for receiving radio frequency signals.
Background
The vector network analyzer is used as a universal S parameter testing instrument, is widely applied to various scientific research institutions, laboratories and production lines for S parameter measurement, and is applied to various antenna tests, cavity filter tests, dielectric filter tests, circulator tests, coupler tests, splitter combiner tests and the like. The cavity filter has high requirements on indexes such as a dynamic range, trace noise and the like of the vector network analyzer, and particularly under the condition of small signal measurement, the accuracy of a measurement result is greatly influenced by the dynamic range and the trace noise indexes of the vector network analyzer. The output power of the port of the vector network analyzer generally has a wider range, such as-50 dBm- +10dBm, when the output power of the port of the vector network analyzer is set to-30 dBm or even-50 dBm, the dynamic range of the vector network analyzer becomes smaller, and the trace noise becomes very jittering, so that the out-band rejection and in-band insertion loss indexes of the cavity filter cannot be accurately measured. To improve the dynamic range, instrumentation companies often adopt a method of adding a gain control circuit to the if signal link so that the if signal amplitude reaching the ADC is increased to the maximum range of the ADC at best without overflowing. The radio frequency gain switching circuit is used for meeting the requirement that radio frequency signals of different working frequency bands need different gain values, and the background noise, the dynamic precision, the power precision and the compression level of a circuit system are improved through the gain control of the radio frequency signals. Referring to fig. 1, a conventional rf gain switching circuit samples an intermediate frequency main signal through a power divider or a coupler to obtain a small signal, a detector detects the small signal and converts the small signal into a digital signal, and the digital signal is compared with a preset value by a comparator, and the attenuation amplitude of an attenuator or the gain of an amplifier is controlled by the comparison result, so as to change the amplitude of the intermediate frequency signal. The method has the disadvantages that the circuit is large, the control process is complex, the circuit comprises an analog circuit and a digital circuit, and new interference is easily introduced to the intermediate frequency signal.
Disclosure of Invention
The application provides a gain switching circuit for receiving radio frequency signals, which aims to solve the technical problems that a circuit for switching radio frequency gains in the prior art is complex and new interference is easily introduced.
In a first aspect, an embodiment provides a gain switching circuit for radio frequency signal reception, including a gain circuit and a first switch circuit;
the gain circuit comprises a first connecting end, a second connecting end, a third connecting end, a fourth connecting end, a node Q, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6;
the first connection end of the gain circuit is used for inputting radio frequency signals; the second connection end of the gain circuit is used for connecting a load circuit; the third connecting end and the fourth connecting end of the gain circuit are used for being connected with the first switch circuit;
one end of the resistor R1 is connected with the first connection end of the gain circuit, and the other end of the resistor R1 is connected with the third connection end of the gain circuit; one end of the resistor R2 is connected with the third connecting end of the gain circuit, and the other end of the resistor R2 is connected with the node Q; one end of the resistor R3 is connected with the first connection end of the gain circuit, and the other end of the resistor R3 is connected with the node Q; one end of the resistor R4 is connected with the second connection end of the gain circuit, and the other end of the resistor R4 is connected with the node Q; one end of the resistor R5 is connected with the fourth connection end of the gain circuit, and the other end of the resistor R5 is connected with the node Q; one end of the resistor R6 is connected with the second connection end of the gain circuit, and the other end of the resistor R6 is connected with the fourth connection end of the gain circuit;
the first switch circuit comprises a first connecting end, a second connecting end and a third connecting end, the first connecting end of the first switch circuit is connected with the third connecting end of the gain circuit, the second connecting end of the first switch circuit is connected with the fourth connecting end of the gain circuit, and the third connecting end of the first switch circuit is used for outputting radio frequency signals; the first switch circuit is used for communicating the fourth connecting end of the gain circuit with the third connecting end of the first switch circuit, or communicating the third connecting end of the gain circuit with the third connecting end of the first switch circuit.
In one embodiment, the gain switching circuit further includes an ADSP circuit, and the ADSP circuit is connected to the first switch circuit; the ADSP circuit is used for sending a switch control signal to the first switch circuit according to the power setting value of the received radio frequency signal, and the first switch circuit responds to the switch control signal to communicate the fourth connecting end of the gain circuit with the third connecting end of the first switch circuit or communicate the third connecting end of the gain circuit with the third connecting end of the first switch circuit.
In one embodiment, the switch control signal comprises a first switch signal and a second switch signal;
when the power setting value of the received radio frequency signal is greater than a first preset value, the ADSP circuit sends the first switching signal to the first switching circuit, and the first switching circuit responds to the first switching signal and is connected with the fourth connecting end of the gain circuit and the third connecting end of the first switching circuit;
when the power setting value of the received radio frequency signal is not greater than a first preset value, the ADSP circuit sends the second switch signal to the first switch circuit, and the first switch circuit responds to the second switch signal and is connected with the third connecting end of the gain circuit and the third connecting end of the first switch circuit.
In one embodiment, the gain switching circuit further includes a circuit board, and the gain circuit and the first switch circuit are disposed on the circuit board.
In one embodiment, the resistor R1, the resistor R2 and the resistor R3 are arranged on the circuit board in a triangular shape, and the triangle formed by the resistor R1, the resistor R2 and the resistor R3 is an equilateral triangle;
and/or the resistor R4, the resistor R5 and the resistor R6 are arranged on the circuit board in a triangular shape, and the triangular shape formed by the resistor R4, the resistor R5 and the resistor R6 is an equilateral triangle.
In an embodiment, the connecting line on the circuit board is a microstrip line.
In an embodiment, on the circuit board, a length of a microstrip line used for electrical connection between the first connection end of the gain circuit and the fourth connection end of the first switch circuit is the same as a length of a microstrip line used for electrical connection between the first connection end of the gain circuit and the third connection end of the first switch circuit.
In one embodiment, at least one metal via is disposed on the circuit board at the periphery of the first switch circuit, and the metal via is used for increasing the isolation between the connection terminals in the gain switching circuit; each of the connection terminals includes a first connection terminal, a second connection terminal, a third connection terminal and/or a fourth connection terminal of the gain circuit 10.
In one embodiment, the first switching circuit includes an electronic switching chip.
In a second aspect, an embodiment provides a radio frequency receiver, including the gain switching circuit according to the first aspect.
According to the gain switching circuit of the above embodiment, the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5 and the resistor R6 are connected in series and in parallel to form a four-port network, so as to replace an SPDT switch of the gain switching circuit in the prior art, and realize the switching control of the radio frequency gain. The gain switching circuit is simple in circuit structure, high in circuit stability, good in port standing wave, high in fault tolerance rate and low in cost, can realize gain switching by only one SPDT switch, and is beneficial to large-scale production.
Drawings
FIG. 1 is a block diagram of a gain control of a prior art network analyzer;
FIG. 2 is a schematic diagram of an embodiment of an RF gain switching circuit;
FIG. 3 is a circuit diagram of a gain switching circuit in an embodiment;
fig. 4 is a circuit board connection diagram of the gain switching circuit in an embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
It should be noted that, for the convenience of description and to make the technical solutions of the present application more clearly understood by those skilled in the art, the node Q introduced in the present application identifies the relevant part of the circuit structure, and cannot be regarded as an additionally introduced terminal in the circuit.
At the present stage, the radio frequency gain switching circuit utilizes two SPDT switches to realize gain control of signals in different working frequency bands by controlling pin levels. Referring to fig. 2, a schematic structural diagram of an embodiment of a radio frequency gain switching circuit is shown, where the radio frequency gain switching circuit includes a first-stage attenuation network, a second-stage attenuation network, a third-stage attenuation network, an amplifier, and two SPDT switches, the first-stage attenuation network includes two attenuators with different attenuation amounts, and is respectively connected between the SPDT switches, the second-stage attenuation network is connected to the SPDT switch at an output end of the first-stage attenuation network, and the amplifier is connected between the second-stage attenuation network and the third-stage attenuation network. The radio frequency gain switching circuit is suitable for a circuit structure for realizing automatic radio frequency gain switching control at a receiving end of a vector network analyzer, and performs gain control processing on a radio frequency signal of a receiver of the vector network analyzer. The radio frequency gain switching circuit adopts two SPDT switches to realize the automatic switching of the radio frequency gain, and different attenuation networks are selected through the two SPDT switches to carry out gain control processing on radio frequency signals. The power compensation is carried out on the radio frequency small signal under the condition of not changing the index of the large signal, the amplitude of the corresponding intermediate frequency signal in the small signal is improved, so that the dynamic range in the small signal state is improved, the trace noise can be improved, the automatic switching of the radio frequency gain is further realized, and the automatic switching circuit of the radio frequency gain is completed (see the circuit structure with the application number of 202011467020.1-suitable for realizing the automatic switching control of the radio frequency gain at the receiving end of a vector network analyzer). However, the radio frequency gain switching circuit is limited by the working frequency band, is expensive in design cost, occupies a large PCB space, and is not beneficial to enterprise production, because the performance index for realizing the automatic switching of the radio frequency gain is closely related to the SPDT switching device, and the working frequency band of a common switch is 9KHz-13GHz or 9KHz-30 GHz. With the improvement of the working frequency band, the requirement on the indexes of the switch is more and more strict, the price of the high-performance index SPDT switch is dozens of times of that of the low-performance index SPDT switch, and the pin design, the bias power supply design, the pin filter circuit design and the like of the high-performance index SPDT switch are more complex than those of the common SPDT switch. The automatic switching circuit has the advantages of wide form and application range and relatively simple design. However, the SPDT switch used for its operation needs to occupy a certain space of the PCB, and its operating bandwidth is limited, and is greatly affected by the operating frequency band, and the SPDT switch with different performances needs to be selected according to different operating frequency bands, so the design cost will be continuously increased.
In the embodiment of the application, in order to enable the radio frequency gain switching circuit to not only normally provide gain compensation for radio frequency signals, but also not improve the design cost and the complex circuit system due to a high-performance SPDT switch, a radio frequency gain switching circuit is provided, wherein a four-port network is formed at one end of a radio frequency line by using resistors, one port is connected with a radio frequency input, the other port is connected with a load, and the other two ports are respectively controlled by two different gains; and then a single SPDT switch is used for connecting the gain control port to receive different radio frequency gain signals. And finally, the radio frequency gain automatic switching circuit can be realized only by controlling the level of a single SPDT switch pin.
Example one
Referring to fig. 3, a circuit diagram of a gain switching circuit for receiving an rf signal according to an embodiment of the invention includes a gain circuit 10 and a first switch circuit 20. The gain circuit 10 includes a first connection terminal IN, a second connection terminal Load, a third connection terminal P2, a fourth connection terminal P1, a node Q, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, and a resistor R6. The first connection IN of the gain circuit 10 is used for inputting the rf signal, and the second connection Load of the gain circuit 10 is used for connecting the Load circuit. The third connection P2 and the fourth connection P1 of the gain circuit 10 are used for connecting to the first switch circuit 20. One end of the resistor R1 is connected to the first connection terminal IN of the gain circuit 10, and the other end is connected to the third connection terminal P2 of the gain circuit 10. One end of the resistor R2 is connected to the third connection terminal P2 of the gain circuit 10, and the other end is connected to the node Q. One end of the resistor R3 is connected to the first connection terminal IN of the gain circuit 10, and the other end is connected to the node Q. One end of the resistor R4 is connected to the second connection terminal Load of the gain circuit 10, and the other end is connected to the node Q. One end of the resistor R5 is connected to the fourth connection terminal P1 of the gain circuit 10, and the other end is connected to the node Q. One end of the resistor R6 is connected to the second connection terminal Load of the gain circuit 10, and the other end is connected to the fourth connection terminal P1 of the gain circuit. The first switch circuit 20 includes a first connection terminal 1, a second connection terminal 2 and a third connection terminal 3, the first connection terminal 1 of the first switch circuit 20 is connected to the third connection terminal P2 of the gain circuit 10, the second connection terminal 2 of the first switch circuit 20 is connected to the fourth connection terminal P1 of the gain circuit 10, and the third connection terminal 3 of the first switch circuit 20 is used for outputting the radio frequency signal. The first switch circuit 20 is used to connect the fourth connection terminal P1 of the gain circuit 10 to the third connection terminal 3 of the first switch circuit 20, or to connect the third connection terminal P2 of the gain circuit 10 to the third connection terminal 3 of the first switch circuit 20.
In one embodiment, the gain switching circuit further includes an ADSP circuit 30, and the ADSP circuit 30 is connected to the first switch circuit 20. The ADSP circuit 30 is configured to transmit a switching control signal to the first switching circuit 20 according to a power setting value of the received radio frequency signal, and the first switching circuit 20 connects the fourth connection terminal P1 of the gain circuit 10 and the third connection terminal 3 of the first switching circuit 20 in response to the switching control signal, or connects the third connection terminal P2 of the gain circuit 10 and the third connection terminal 3 of the first switching circuit 20. In one embodiment, the switch control signal includes a first switch signal and a second switch signal. When the power setting value of the received radio frequency signal is greater than the first preset value, the ADSP circuit 30 sends a first switching signal to the first switching circuit 20, and the first switching circuit 20 connects the fourth connection terminal P1 of the gain circuit 10 and the third connection terminal 3 of the first switching circuit 20 in response to the first switching signal. When the power setting value of the received radio frequency signal is not greater than the first preset value, the ADSP circuit 30 sends a second switching signal to the first switching circuit 20, and the first switching circuit 20 connects the third connection terminal P2 of the gain circuit 10 and the third connection terminal 3 of the first switching circuit 20 in response to the second switching signal.
Referring to fig. 4, a circuit board connection diagram of the gain switching circuit in an embodiment is shown, in an embodiment, the gain switching circuit further includes a circuit board, and the gain circuit 10 and the first switch circuit 20 are disposed on the circuit board. In one embodiment, the resistor R1, the resistor R2, and the resistor R3 are disposed on the circuit board in a triangular shape, and the triangle formed by the resistor R1, the resistor R2, and the resistor R3 is an equilateral triangle. In one embodiment, the resistor R4, the resistor R5, and the resistor R6 are disposed on the circuit board in a triangular shape, and the triangle formed by the resistor R4, the resistor R5, and the resistor R6 is an equilateral triangle. In one embodiment, the connecting line on the circuit board is a microstrip line.
In an embodiment, on the circuit board, the length of the microstrip line for electrical connection between the first connection end 80 of the gain circuit 10 and the fourth connection end of the first switch circuit 20 is the same as the length of the microstrip line for electrical connection between the first connection end 80 of the gain circuit 10 and the third connection end of the first switch circuit 20. That is, the lengths of the microstrip line 61, the microstrip line 90 to the microstrip line 52 are the same as the lengths of the microstrip line 61, the microstrip line 90 to the microstrip line 62. In one embodiment, at least one metal via is disposed on the circuit board at the periphery of the first switch circuit 20, and the metal via is used to increase the isolation between the connection terminals in the gain switching circuit. In one embodiment, each of the connection terminals includes the first connection terminal 80, the second connection terminal 70, the third connection terminal and/or the fourth connection terminal of the gain circuit 10. In one embodiment, the first switching circuit 20 includes an electronic switching chip.
In one embodiment of the application, the resistors are symmetrically arranged in a triangular mode, electromagnetic interference when the resistors work at high frequency is reduced, the distance between every two resistors is uniformly distributed, and parasitic parameters generated by welding can be effectively reduced. The standing wave parameters of four ports of the radio frequency gain network formed by the resistors are good, the loads are matched, and the insertion loss of the circuit is greatly reduced. In one embodiment, the first switch circuit and the gain circuit are arranged in parallel, so that electromagnetic interference of a bias circuit on a switch pin to the resistor gain network can be effectively reduced. The electric length and the position layout of the microstrip line on the circuit board are precisely designed, so that the position symmetry and the electric length are kept to be equal. The lengths of the microstrip line 61, the microstrip line 90 to the microstrip line 52 are the same as the lengths of the microstrip line 61, the microstrip line 90 to the microstrip line 62, so that the phase angles of the first connection end and the second connection end of the radio frequency signal reaching the first switch circuit 20 are equal, and phase distortion and interference on the signal in the transmission process can be effectively avoided. The metal via holes are arranged around the first switch circuit 20, so that the isolation between the radio frequency ports can be effectively increased. The radio frequency gain switching circuit has the advantages of small PCB area, simple design and good isolation. The radio frequency gain switching circuit is suitable for working frequency band range of 9KHz-40GHz, insertion loss is small, and port standing wave is good. The gain value of the radio frequency gain switching circuit is simple to control, and only the resistance values of the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5 and the resistor R6 need to be changed. The radio frequency gain switching circuit omits an SPDT switch, has low cost, small occupied PCB space, easy integration, high system fault tolerance rate, large-scale production and wide application range.
In an embodiment of the present application, a radio frequency receiver is further disclosed, which includes the gain switching circuit as described above.
The gain switching circuit disclosed in the embodiments of the application includes a gain circuit and a first switch circuit. The gain circuit comprises a first connection end, a second connection end, a third connection end, a fourth connection end, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6. Because the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5 and the resistor R6 are connected in series and parallel to form a four-port network, the four-port network replaces an SPDT switch of a gain switching circuit in the prior art, and switching control of radio frequency gain can be realized. The gain switching circuit has the advantages of simple circuit structure, high circuit stability, good port standing wave, high fault tolerance rate and low cost, and is beneficial to large-scale production.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (10)
1. A gain switching circuit for radio frequency signal reception, comprising a gain circuit and a first switch circuit;
the gain circuit comprises a first connecting end, a second connecting end, a third connecting end, a fourth connecting end, a node Q, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6;
the first connection end of the gain circuit is used for inputting radio frequency signals; the second connection end of the gain circuit is used for connecting a load circuit; the third connecting end and the fourth connecting end of the gain circuit are used for being connected with the first switch circuit;
one end of the resistor R1 is connected with the first connection end of the gain circuit, and the other end of the resistor R1 is connected with the third connection end of the gain circuit; one end of the resistor R2 is connected with the third connecting end of the gain circuit, and the other end of the resistor R2 is connected with the node Q; one end of the resistor R3 is connected with the first connection end of the gain circuit, and the other end of the resistor R3 is connected with the node Q; one end of the resistor R4 is connected with the second connection end of the gain circuit, and the other end of the resistor R4 is connected with the node Q; one end of the resistor R5 is connected with the fourth connection end of the gain circuit, and the other end of the resistor R5 is connected with the node Q; one end of the resistor R6 is connected with the second connection end of the gain circuit, and the other end of the resistor R6 is connected with the fourth connection end of the gain circuit;
the first switch circuit comprises a first connecting end, a second connecting end and a third connecting end, the first connecting end of the first switch circuit is connected with the third connecting end of the gain circuit, the second connecting end of the first switch circuit is connected with the fourth connecting end of the gain circuit, and the third connecting end of the first switch circuit is used for outputting radio frequency signals; the first switch circuit is used for communicating the fourth connecting end of the gain circuit with the third connecting end of the first switch circuit, or communicating the third connecting end of the gain circuit with the third connecting end of the first switch circuit.
2. The gain switching circuit of claim 1, further comprising an ADSP circuit connected to the first switch circuit; the ADSP circuit is used for sending a switch control signal to the first switch circuit according to the power setting value of the received radio frequency signal, and the first switch circuit responds to the switch control signal to communicate the fourth connecting end of the gain circuit with the third connecting end of the first switch circuit or communicate the third connecting end of the gain circuit with the third connecting end of the first switch circuit.
3. The gain switching circuit of claim 2, wherein the switch control signal comprises a first switch signal and a second switch signal;
when the power setting value of the received radio frequency signal is greater than a first preset value, the ADSP circuit sends the first switching signal to the first switching circuit, and the first switching circuit responds to the first switching signal and is connected with the fourth connecting end of the gain circuit and the third connecting end of the first switching circuit;
when the power setting value of the received radio frequency signal is not greater than a first preset value, the ADSP circuit sends the second switch signal to the first switch circuit, and the first switch circuit responds to the second switch signal and is connected with the third connecting end of the gain circuit and the third connecting end of the first switch circuit.
4. The gain switching circuit of claim 1, further comprising a circuit board, the gain circuit and the first switch circuit being disposed on the circuit board.
5. The gain switching circuit according to claim 4, wherein the resistor R1, the resistor R2 and the resistor R3 are disposed on the circuit board in a triangular shape, and the triangle formed by the resistor R1, the resistor R2 and the resistor R3 is an equilateral triangle;
and/or the resistor R4, the resistor R5 and the resistor R6 are arranged on the circuit board in a triangular shape, and the triangular shape formed by the resistor R4, the resistor R5 and the resistor R6 is an equilateral triangle.
6. The gain switching circuit of claim 5, wherein the connection lines on the circuit board are microstrip lines.
7. The gain switching circuit according to claim 6, wherein a length of the microstrip line for electrical connection between the first connection terminal of the gain circuit and the fourth connection terminal of the first switch circuit is the same as a length of the microstrip line for electrical connection between the first connection terminal of the gain circuit and the third connection terminal of the first switch circuit on the circuit board.
8. The gain switching circuit according to claim 4, wherein at least one metal via is disposed on the circuit board at the periphery of the first switch circuit, and the metal via is used for increasing the isolation between the connection terminals in the gain switching circuit; each connection end comprises a first connection end, a second connection end, a third connection end and/or a fourth connection end of the gain circuit.
9. The gain switching circuit of claim 1, wherein the first switching circuit comprises an electronic switching chip.
10. A radio frequency receiver comprising the gain switching circuit of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210217842.7A CN114337710B (en) | 2022-03-08 | 2022-03-08 | Gain switching circuit for receiving radio frequency signal and radio frequency receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210217842.7A CN114337710B (en) | 2022-03-08 | 2022-03-08 | Gain switching circuit for receiving radio frequency signal and radio frequency receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114337710A true CN114337710A (en) | 2022-04-12 |
| CN114337710B CN114337710B (en) | 2022-06-03 |
Family
ID=81031631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210217842.7A Active CN114337710B (en) | 2022-03-08 | 2022-03-08 | Gain switching circuit for receiving radio frequency signal and radio frequency receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114337710B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614784A (en) * | 2022-05-11 | 2022-06-10 | 深圳市鼎阳科技股份有限公司 | Ultra-wideband adjustable amplitude limiter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08116224A (en) * | 1994-10-19 | 1996-05-07 | Nippondenso Co Ltd | Gain variable amplifier |
| EP1309083A1 (en) * | 2001-11-06 | 2003-05-07 | Siemens Aktiengesellschaft | Method for switching the gain of an amplifier and a switched gain low noise amplifier |
| CN102916666A (en) * | 2011-08-02 | 2013-02-06 | 中国科学院微电子研究所 | Broadband programmable gain amplifier |
| CN103954956A (en) * | 2014-05-21 | 2014-07-30 | 西安空间无线电技术研究所 | Self-adaptation four-port cancellation network structure and self-adaptation cancellation method |
| CN110828956A (en) * | 2018-08-08 | 2020-02-21 | 上海华为技术有限公司 | Reconfigurable cross coupler |
| CN112152661A (en) * | 2020-09-07 | 2020-12-29 | Oppo广东移动通信有限公司 | Antenna assembly, radio frequency system and customer premises equipment |
| CN112636713A (en) * | 2020-12-14 | 2021-04-09 | 上海创远仪器技术股份有限公司 | Circuit structure suitable for realizing radio frequency gain automatic switching control at receiving end of vector network analyzer |
-
2022
- 2022-03-08 CN CN202210217842.7A patent/CN114337710B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08116224A (en) * | 1994-10-19 | 1996-05-07 | Nippondenso Co Ltd | Gain variable amplifier |
| EP1309083A1 (en) * | 2001-11-06 | 2003-05-07 | Siemens Aktiengesellschaft | Method for switching the gain of an amplifier and a switched gain low noise amplifier |
| CN102916666A (en) * | 2011-08-02 | 2013-02-06 | 中国科学院微电子研究所 | Broadband programmable gain amplifier |
| CN103954956A (en) * | 2014-05-21 | 2014-07-30 | 西安空间无线电技术研究所 | Self-adaptation four-port cancellation network structure and self-adaptation cancellation method |
| CN110828956A (en) * | 2018-08-08 | 2020-02-21 | 上海华为技术有限公司 | Reconfigurable cross coupler |
| CN112152661A (en) * | 2020-09-07 | 2020-12-29 | Oppo广东移动通信有限公司 | Antenna assembly, radio frequency system and customer premises equipment |
| CN112636713A (en) * | 2020-12-14 | 2021-04-09 | 上海创远仪器技术股份有限公司 | Circuit structure suitable for realizing radio frequency gain automatic switching control at receiving end of vector network analyzer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614784A (en) * | 2022-05-11 | 2022-06-10 | 深圳市鼎阳科技股份有限公司 | Ultra-wideband adjustable amplitude limiter |
| CN114614784B (en) * | 2022-05-11 | 2022-08-02 | 深圳市鼎阳科技股份有限公司 | Ultra-wideband adjustable amplitude limiter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114337710B (en) | 2022-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101164243B1 (en) | Distributing apparatus and method for communication using the same | |
| KR0164368B1 (en) | Rf power combiner | |
| CN108886190B (en) | Testboard for the filter of RF signal and for measuring passive intermodulation PIM | |
| US7321276B2 (en) | Independently adjustable combined harmonic rejection filter and power sampler | |
| CN110286347B (en) | Electronic calibration piece, calibration system, method, device and storage medium | |
| CN114337710B (en) | Gain switching circuit for receiving radio frequency signal and radio frequency receiver | |
| Chung et al. | A Packaged 0.01–26-GHz single-chip SiGe reflectometer for two-port vector network analyzers | |
| CN114628876A (en) | Microstrip line directional coupler, radio frequency transceiver and vector network analyzer | |
| CN114497954A (en) | Power divider and system | |
| US10041986B2 (en) | Balanced bridge | |
| CN216904882U (en) | Radio frequency receiver | |
| Umar et al. | 60 GHz double edge coupled Marchand balun for PCB implementation | |
| CN112636713A (en) | Circuit structure suitable for realizing radio frequency gain automatic switching control at receiving end of vector network analyzer | |
| CN113381779B (en) | Ultra wideband receiver | |
| CN107546454B (en) | Coupler and signal processing method | |
| CN104683041A (en) | Radio frequency element testing method | |
| EP3549258B1 (en) | Rf module and method for testing an rf module | |
| CN112881790A (en) | 77GHz power monitoring circuit based on wave detector | |
| CN215498936U (en) | Frequency conversion receiving device | |
| CN110988548A (en) | Test method and platform of microwave frequency converter | |
| CN213960031U (en) | Circuit structure suitable for realizing radio frequency gain automatic switching control at receiving end of vector network analyzer | |
| KR100322477B1 (en) | Intermodulation Distortion Measurement System | |
| CN219122317U (en) | Radio frequency device detection system | |
| CN218679071U (en) | Radio frequency transceiver for vector network analyzer and vector network analyzer | |
| CN117543181A (en) | Ultra-wideband directional coupler, radio frequency transceiver and vector network analyzer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |