A five-channel frequency conversion module

Abstract

The present application discloses a five-channel frequency conversion module, which realizes channel isolation by means of a first circuit board and a second circuit board which are spatially isolated from each other; the first circuit board is divided into a first region, a second region and a third region which are partially connected in sequence in the length direction by means of a first dividing groove and a second dividing groove; the third region is a first sub-region and a second sub-region which are partially connected by the third dividing groove; fourth to eighth dividing grooves are provided at intervals in the width direction of the second circuit board, and the second circuit board is divided into a fourth region to a ninth region in sequence in the length direction; the surfaces of the first region to the ninth region are respectively provided with a frequency selection circuit, a differential circuit, a first mixing and filtering circuit, a second mixing and filtering circuit, a mode selection circuit, a gain adjustment circuit, a first radio frequency switch sub-circuit, a second radio frequency switch sub-circuit and an output circuit, so as to solve the problems of spatial isolation and channel isolation of each circuit, and the channel isolation degree of the circuit meets the requirements.

Description

Technical Field

[0001] The present application relates to the field of frequency conversion circuits, and in particular to a five-channel frequency conversion module. Background Art

[0002] In the field of aerospace measurement and control, frequency conversion circuits are very important. The function of frequency conversion circuits is to down-convert the received signal into the target signal for the receiver to extract. In order to extract the target signal from many signals, a high-quality multi-channel frequency conversion module is required.

[0003] During the production and development of five-channel inverters, it is very difficult to control the spurious, noise, channel isolation and other indicators of the inverter module. In particular, channel isolation is a critical indicator. The channel isolation of the multi-channel inverter module mainly depends on the isolation of the RF switch and the spatial radiation. The channel isolation of the existing inverter modules is generally less than 70dB, which cannot meet the design requirements. Summary of the invention

[0004] The main purpose of the present application is to provide a five-channel frequency conversion module, aiming to solve the technical problem that the channel isolation of the existing frequency converter module is generally less than 70dB and cannot meet the design requirements.

[0005] To achieve the above-mentioned purpose, the present application provides a five-channel frequency conversion module, a first circuit board and a second circuit board; a first dividing groove and a second dividing groove are provided at intervals in the width direction of the first circuit board, the first dividing groove and the second dividing groove divide the first circuit board into a first area, a second area and a third area which are partially connected in sequence in the length direction, and the third area is a first sub-area and a second sub-area which are partially connected by the third dividing groove; the second circuit board is provided with fourth to eighth dividing grooves at intervals in the width direction, the fourth to eighth dividing grooves divide the second circuit board into a fourth area to a ninth area in sequence in the length direction; the surface layers of the first area to the ninth area are respectively provided with a frequency selection circuit, a differential circuit, a first mixing filter circuit, a second mixing filter circuit, a mode selection circuit, a gain adjustment circuit, a first radio frequency switch sub-circuit, a second radio frequency switch sub-circuit, and an output circuit.

[0006] Optionally, the frequency selection circuit includes: an input signal line, which is arranged in the length direction of the first circuit board; a limiter circuit, which is connected in series with the input signal line in the length direction of the first circuit; a first radio frequency switch circuit, which is connected in series with the limiter circuit in the length direction of the first circuit board; a second radio frequency switch circuit, which is connected to the first radio frequency switch circuit through parallel wires and a first amplifier circuit in the width direction of the first circuit board; a third radio frequency switch circuit, which is connected to the second radio frequency switch circuit in the length direction of the first circuit board; a fourth radio frequency switch circuit, which is connected to the third radio frequency switch circuit through parallel first branch circuits to fourth branch circuits in the length direction of the first circuit board; wherein the first branch to the fourth branch respectively include a first filter circuit group to a fourth filter circuit group arranged in the length direction of the first circuit board; a fifth radio frequency switch circuit, which is arranged near the bottom of the first dividing groove. The input end of the fifth RF switch circuit is connected to the output end of the fourth RF switch circuit and the output end of the third RF switch circuit respectively through the fifth branch and the first serial-parallel branch; wherein the first serial-parallel branch includes: a first differential circuit, connected to the output end of the third RF switch circuit through the input end; two second amplifier circuits, each input end is connected to the two output ends of the first differential circuit respectively; a balun circuit, two input ends are respectively connected to the output ends of the two second amplifier circuits; a first filter circuit, the input end is connected to the output end of the balun circuit, and the output end of the first filter circuit is connected to the input end of the fifth RF switch circuit; the fifth branch includes: a third amplifier circuit, the input end is connected to the output end of the fourth RF switch circuit; a second filter circuit, the input end is connected to the output end of the third amplifier circuit, and the output end of the second filter circuit is connected to the fifth RF switch circuit.

[0007] Optionally, the differential circuit includes: a first attenuator circuit, a third filter circuit and a second differential circuit connected in series in sequence; the first attenuator circuit is arranged near the bottom of the first dividing groove, and the third filter circuit and the second differential circuit are arranged in sequence in the length direction of the first circuit board; wherein the input end of the first attenuator circuit is connected to the output end of the fifth RF switch circuit, and the output end of the second differential circuit is connected to the first mixing filter circuit.

[0008] Optionally, the first frequency mixing and filtering circuit includes: a first mixer, arranged near the bottom of the second dividing groove, the two first input ends of the first mixer are respectively connected to the two output ends of the second differential circuit; a first signal generating circuit, including a fourth filter circuit, a fourth amplifier circuit, and a fifth filter circuit connected in series in sequence, one end of the first signal generating circuit is connected to the signal input end of the first circuit board, and the output end of the first signal generating circuit is connected to the second input end of the first mixer; a seventh filter circuit, located in the second sub-region of the first circuit board, the input end is connected to the output end of the first mixer; a sixth amplifier circuit, located in the second sub-region of the first circuit board, the input end is connected to the output end of the seventh filter circuit, and the sixth amplifier circuit is connected to the second frequency mixing and filtering circuit. Optionally, the second frequency mixing and filtering circuit is arranged in the width direction of the fourth region, and the second frequency mixing and filtering circuit includes: a seventh amplifier circuit, the input end of which receives the second local oscillator signal; an eighth filter circuit, the input end of which is connected to the output end of the seventh amplifier circuit; a second mixer, the first input end of which is connected to the output end of the eighth filter circuit, the second input end of the second mixer is connected to the output end of the sixth amplifier circuit, and the output end of the second mixer is connected to the mode selection circuit.

[0009] Optionally, the mode selection circuit is arranged in the width direction of the fifth region, and the mode selection circuit includes: a ninth filter circuit, which is arranged near the bottom of the fourth dividing groove, and the input end of the ninth filter circuit is connected to the output end of the second mixer; a sixth RF switch, whose input end is connected to the output end of the ninth filter circuit; a seventh RF switch, whose input end is connected to the output end of the sixth RF switch through an eighth amplifier circuit and a wire, and the output end of the seventh RF switch is connected to the gain adjustment circuit.

[0010] Optionally, the gain adjustment circuit is arranged in the width direction of the sixth region, and the gain adjustment circuit includes: a first digitally controlled attenuator circuit, whose input end is connected to the output end of the seventh RF switch; a ninth amplifier circuit, whose input end is connected to the output end of the first digitally controlled attenuator circuit; a second digitally controlled attenuator circuit, whose input end is connected to the output end of the ninth amplifier circuit, and whose output end is connected to the first RF switch sub-circuit.

[0011] Optionally, the first RF switch sub-circuit is arranged in the width direction of the seventh region, and the first RF switch sub-circuit includes: an eighth RF switch, whose input end is connected to the output end of the second digitally controlled attenuator circuit, and the output end of the eighth RF switch is connected to the second RF switch sub-circuit.

[0012] Optionally, the second RF switch sub-circuit is arranged in the width direction of the eighth region, and the second RF switch sub-circuit includes: a ninth RF switch, whose input end is connected to the output end of the eighth RF switch through the first bandwidth selection circuit to the fourth bandwidth selection circuit respectively, and the output end of the ninth RF switch is connected to the output circuit, wherein the first bandwidth selection circuit is arranged close to the bottom of the seventh dividing groove, and the second bandwidth selection circuit to the fourth bandwidth selection circuit are located in the seventh dividing groove.

[0013] Optionally, the output circuit is arranged in the width direction of the ninth region, and the output circuit includes: a tenth amplifier circuit, whose input end is connected to the output end of the ninth RF switch; an eleventh amplifier circuit, whose input end is connected to the output end of the tenth amplifier circuit, and the output end of the eleventh amplifier circuit outputs a frequency conversion signal.

[0014] A five-channel frequency conversion module proposed in an embodiment of the present application realizes channel isolation through a first circuit board and a second circuit board that are spatially isolated from each other, and the first circuit board is divided into a first area, a second area and a third area that are partially connected in sequence in the length direction by a first dividing groove and a second dividing groove, and the third area is a first sub-area and a second sub-area that are partially connected by the third dividing groove; fourth to eighth dividing grooves are arranged at intervals in the width direction of the second circuit board, and the second circuit board is divided into a fourth area to a ninth area in sequence in the length direction; the surface layers of the first area to the ninth area are respectively provided with a frequency selection circuit, a differential circuit, a first mixing and filtering circuit, a second mixing and filtering circuit, a mode selection circuit, a gain adjustment circuit, a first radio frequency switch sub-circuit, a second radio frequency switch sub-circuit, and an output circuit, which solves the problems of spatial isolation and channel isolation of each circuit, and the channel isolation degree of the circuit meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a first circuit structure of a five-channel frequency conversion module submodule provided in an embodiment of the present application;

[0016] Figure 2 This is a schematic diagram of a second circuit structure of a five-channel frequency conversion module submodule provided in an embodiment of the present application.

[0017] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0019] The five-channel frequency conversion module can include five independent frequency conversion sub-modules. Figure 1This is a schematic diagram of a first circuit structure of a five-channel frequency conversion module submodule provided in an embodiment of the present application. Figure 2 A second circuit structure diagram of a five-channel frequency conversion module submodule provided in an embodiment of the present application, referring to Figure 1-Figure 2 Each frequency conversion submodule includes: a first circuit board 100 and a second circuit board 200, wherein a first dividing groove 101 and a second dividing groove 102 are provided in the width direction of the first circuit board 100, and the first dividing groove 101 and the second dividing groove 102 divide the first circuit board 100 into a first area 104, a second area 105 and a third area 106 which are partially connected in sequence in the length direction, and the third area 106 is partially connected to a first sub-area 1061 and a second sub-area 1062 by the third dividing groove 103; the second circuit board 200 is provided with a first dividing groove 101 and a second dividing groove 102 in the width direction. The fourth to eighth dividing grooves 207 to 211 are arranged at intervals, and the fourth to eighth dividing grooves 207 to 211 divide the second circuit board 200 into a fourth area 212 to a ninth area 217 in the length direction; the surface layers of the first area 104 to the ninth area 217 are respectively provided with a frequency selection circuit 107, a differential circuit 108, a first mixing filter circuit 109, a second mixing filter circuit 201, a mode selection circuit 202, a gain adjustment circuit 203, a first RF switch sub-circuit 204, a second RF switch sub-circuit 205, and an output circuit 206.

[0020] Specifically, the first dividing groove 101 and the second dividing groove 102 extending in the width direction are staggered in the length direction of the first circuit board 100, and the openings of the first dividing groove 101 and the second dividing groove 102 are respectively connected to the two side surfaces of the first circuit board 100. The first dividing groove 101 and the second dividing groove 102 divide the first circuit board 100 into the first area 104 to the third area 106, and the third dividing groove 103 is arranged on the third area 106. The third dividing groove 103 divides the third area 106 into the first sub-area 1061 and the second sub-area 1062 in the width direction of the first circuit board 100, and one end of the third dividing groove 103 is connected to the outer side wall of the third area 106. The fourth dividing groove 207 to the eighth dividing groove 211 extending in the width direction are staggered in sequence in the length direction of the second circuit board 200, wherein one end of the fourth dividing groove 207 to the eighth dividing groove 211 are all connected to a side wall of the second circuit board 200. The fourth dividing groove 207 to the eighth dividing groove 211 divide the second circuit board 200 into the fourth area 212 to the ninth area 217 which are connected to each other. The surface layers of the first area 104 to the ninth area 217 are respectively provided with a frequency selection circuit 107, a differential circuit 108, a first mixing filter circuit 109, a second mixing filter circuit 201, a mode selection circuit 202, a gain adjustment circuit 203, a first RF switch subcircuit 204, a second RF switch subcircuit 205, and an output circuit 206. The embodiment of the utility model can realize channel isolation through the spatial isolation of the first circuit board 100 and the second circuit board 200, so the target channel isolation index can be preliminarily achieved.

[0021] In an embodiment of the present application, the frequency selection circuit 107 may include an input signal line 1071, a limiter circuit 1072, a first RF switch circuit 1073, a second RF switch circuit 1074, a third RF switch circuit 1075, a fourth RF switch circuit 1076, and a fifth RF switch circuit 1077, wherein the input signal line 1071 is arranged in the length direction of the first circuit board 100; the limiter circuit 1072 is connected in series with the input signal line 1071 in the length direction of the first circuit board 100; the first RF switch circuit 1073 is connected in series with the limiter circuit 1072 in the length direction of the first circuit board 100; the second RF switch circuit 1074 is connected to the first amplifier circuit 10711 through parallel wires in the width direction of the first circuit board 100. The first RF switch circuit 1073; the third RF switch circuit 1075 is connected to the second RF switch circuit 1074 in the length direction of the first circuit board 100; the fourth RF switch circuit 1076 is connected to the third RF switch circuit 1075 through the first branch circuit to the fourth branch circuit in parallel in the length direction of the first circuit board 100; wherein the first branch to the fourth branch respectively include the first filter circuit group to the fourth filter circuit group arranged in the length direction of the first circuit board 100; the fifth RF switch circuit 1077 is arranged near the bottom of the first dividing groove 101, and the input end of the fifth RF switch circuit 1077 is respectively connected to the output end of the fourth RF switch circuit 1076 and the output end of the third RF switch circuit 1075 through the fifth branch and the first series-parallel branch.

[0022] The limiter circuit 1072 is used to limit the amplitude of the input voltage, the first RF switch circuit 1073 and the second RF switch circuit 1074 are used to select the wire path or the path of the first amplifier circuit 10711 under the control of the control circuit, so as to select different working modes. The third RF switch circuit 1075 and the fourth RF switch circuit 1076 are used to select one of the first branch to the fourth branch for output under the control of the control circuit, so as to achieve the selection of different frequency bands, wherein the first branch to the fourth branch respectively include the first filter circuit group to the fourth filter circuit group arranged in the length direction of the first circuit board 100, the first branch is used to output the signal of the 800MHz to 1300MHz frequency band, the second branch is used to output the signal of the 1300MHz to 1800MHz frequency band, the third branch is used to output the signal of the 1800MHz to 3000MHz frequency band, and the fourth branch is used to output the signal of the 500MHz to 800MHz frequency band. The input end of the fifth RF switch circuit 1077 is connected to the output end of the fourth RF switch circuit 1076 and the output end of the third RF switch circuit 1075 through the fifth branch and the first series-parallel branch. The first RF switch circuit 1073 to the fifth RF switch circuit 1077 can further achieve channel isolation through spatial isolation.

[0023] In an embodiment of the present application, the first series-parallel branch may include a first differential circuit 10710, two second amplifier circuits 10712, a balun circuit 10712 and a first filter circuit 1079, wherein the input end of the first differential circuit 10710 is connected to the output end of the third RF switch circuit 1075; each input end of the two second amplifier circuits 10712 is respectively connected to the two output ends of the first differential circuit 10710; the two input ends of the balun circuit 10712 are respectively connected to the output ends of the two first amplifier circuits 10711; the first filter circuit The input end of 1079 is connected to the output end of the balun circuit 10712, and the output end of the first filter circuit 1079 is connected to the input end of the fifth RF switch circuit 1077; the fifth branch may include a third amplifier circuit 10713 and a second filter circuit 10714, wherein the input end of the third amplifier circuit 10713 is connected to the output end of the fourth RF switch circuit 1076; the input end of the second filter circuit 10714 is connected to the output end of the third amplifier circuit 10713, and the output end of the second filter circuit 10714 is connected to the fifth RF switch circuit 1077.

[0024] Specifically, the first serial-parallel branch is used to generate an output signal that is phase-cancelled with the signal output from any one of the first branch to the fourth branch. The first differential circuit 10710 is used to generate two differential signals from the signal output by the third RF switch, and the two differential signals are respectively amplified by two first amplifiers, synthesized by the balun circuit 10712 and processed by the first filter circuit 1079 to obtain the first output signal, and the output of the fourth RF switch circuit 1076 is processed by the third amplifier circuit 10713 and the second filter circuit 10714 to obtain the second output signal, and the first output signal and the second output signal are processed by the fifth RF switch circuit 1077 to obtain a frequency-selective signal with phase cancellation. The first serial-parallel branch is arranged along the length direction of the first circuit board 100.

[0025] In an embodiment of the present application, the differential circuit 108 may include a first attenuator circuit 1081, a third filter circuit 1082 and a second differential circuit 1083 which are connected in series in sequence, the first attenuator circuit 1081 is arranged near the bottom of the first dividing slot 101, and the third filter circuit 1082 and the second differential circuit 1083 are arranged in sequence in the length direction of the first circuit board 100; wherein the input end of the first attenuator circuit 1081 is connected to the output end of the fifth RF switch circuit 1077, and the output end of the second differential circuit 1083 is connected to the first mixing filter circuit 109.

[0026] Specifically, the differential circuit 108 is used to attenuate the frequency-selective signal to a suitable multiple through the first attenuator circuit 1081 , and then output two differential signals through the third filter circuit 1082 and the second differential circuit 1083 .

[0027] In an embodiment of the present application, the first frequency mixing and filtering circuit 109 may include a first mixer 1091, a first signal generating circuit, a fourth filter circuit 1093, a fourth amplifier circuit 1092, a fifth filter circuit 1094, a sixth amplifier circuit 1095 and a seventh filter circuit 1096, wherein the first mixer 1091 is arranged near the bottom of the second dividing slot 102, and the two first input terminals of the first mixer 1091 are respectively connected to the two output terminals of the first differential circuit 10710; the first signal generating circuit includes the fourth filter circuit 1093, the fourth amplifier circuit 1092 which are sequentially connected in series. and the fifth filter circuit 1094, one end of the first signal generating circuit is connected to the signal input end of the first circuit board 100, and the output end of the first signal generating circuit is connected to the second input end of the first mixer 1091; the input end of the fourth amplifier circuit 1092 is connected to the output end of the fifth filter circuit 1094, and the output end is connected to the second input end of the first mixer 1091; the input end of the seventh filter circuit 1096 is connected to the output end of the first mixer 1091; the input end of the sixth amplifier circuit 1095 is connected to the output end of the seventh filter circuit 1096, and the sixth amplifier circuit 1095 is connected to the second mixing filter circuit 201.

[0028] Specifically, the third dividing groove 103 may be L-shaped, one end of the L-shaped third dividing groove 103 is connected to the side wall of the first circuit board 100, and the other end is deep into the third area 106. The first mixing filter circuit 109 is arranged near the tail end of the L-shaped third dividing groove 103. The input end of the fourth filter circuit 1093 is connected to the first local oscillator signal input end of the third area 106. After the first local oscillator signal input end receives the first local oscillator signal, it is filtered and amplified by the fourth filter circuit 1093, the fourth amplifier circuit 1092 and the fifth filter circuit 1094 in sequence to obtain the input signal of the first mixer 1091. After the input signal of the first mixer 1091 and the two differential signals are mixed by the first mixer 1091, a first-order mixing signal is obtained. The first-order mixing signal is processed by the filter amplifier circuit composed of the seventh filter circuit 1096 and the sixth amplifier circuit 1095 to obtain a first-order mixing output signal.

[0029] In an embodiment of the present application, the second mixing and filtering circuit 201 is arranged in the width direction of the fourth area 212, and the second mixing and filtering circuit 201 may include a seventh amplifier circuit 2011, an eighth filter circuit 2012 and a second mixer 2013, wherein the input end of the seventh amplifier circuit 2011 receives a first-stage mixing output signal; the input end of the eighth filter circuit 2012 is connected to the output end of the seventh amplifier circuit 2011; the first input end of the second mixer 2013 is connected to the output end of the eighth filter circuit 2012, the second input end of the second mixer 2013 receives the first-stage mixing output signal, and the output end of the second mixer 2013 is connected to the mode selection circuit 202.

[0030] Specifically, one end of the seventh amplifier circuit 2011 is connected to the sixth amplifier circuit 1095 and receives the first-stage mixing output signal, and the first-stage mixing output signal is processed by the filter amplifier circuit composed of the seventh amplifier circuit 2011 and the eighth filter circuit 2012 to obtain the second input signal. The second mixer 2013 receives the second local oscillator signal as the first input signal. After the second input signal and the first input signal are mixed by the second mixer 2013, the second-stage mixing signal is output to the mode selection circuit 202.

[0031] In an embodiment of the present application, the mode selection circuit 202 is arranged in the width direction of the fifth region 213, and the mode selection circuit 202 may include a ninth filter circuit 2021, a sixth RF switch 2022 and a seventh RF switch 2023, wherein the ninth filter circuit 2021 is arranged near the bottom of the fourth dividing groove 207, and the input end of the ninth filter circuit 2021 is connected to the output end of the second mixer 2013; the input end of the sixth RF switch 2022 is connected to the output end of the ninth filter circuit 2021; the input end of the seventh RF switch 2023 is connected to the output end of the sixth RF switch 2022 through the eighth amplifier circuit 2024 and the wire in parallel, and the output end of the seventh RF switch 2023 is connected to the gain adjustment circuit 203.

[0032] Specifically, the secondary mixing signal is processed by the ninth filter circuit 2021 and the mode selection circuit 202 to output a signal to be selected. In addition to mode selection, the sixth RF switch 2022 and the seventh RF switch 2023 can also be spatially isolated from the seventh RF switch 2023 by the eighth amplifier circuit 2024 and the wire, thereby further realizing channel isolation and further achieving the target channel isolation index.

[0033] In an embodiment of the present application, the gain adjustment circuit 203 is arranged in the width direction of the sixth region 214, and the gain adjustment circuit 203 may include a first digitally controlled attenuator circuit 2031, a ninth amplifier circuit 2032 and a second digitally controlled attenuator circuit 2033, wherein the input end of the first digitally controlled attenuator circuit 2031 is connected to the output end of the seventh RF switch 2023 and receives the signal to be selected; the input end of the ninth amplifier circuit 2032 is connected to the output end of the first digitally controlled attenuator circuit 2031; the input end of the second digitally controlled attenuator circuit 2033 is connected to the output end of the ninth amplifier circuit 2032, and the output end of the second digitally controlled attenuator circuit 2033 is connected to the first RF switch sub-circuit 204.

[0034] Specifically, the digitally controlled gain adjustment circuit 203 is formed by using the first digitally controlled attenuator circuit 2031, the ninth amplifier circuit 2032 and the second digitally controlled attenuator circuit 2033. The digitally controlled gain adjustment circuit 203 can provide a flexible gain adjustment range, and the adjustment process of the digitally controlled gain adjustment circuit 203 can be automatically controlled to meet different application requirements. After processing the signal to be selected, the gain adjustment circuit outputs the signal to be selected whose gain meets the requirements.

[0035] In an embodiment of the present application, the first RF switch sub-circuit 204 is arranged in the width direction of the seventh region 215, the input end of the first RF switch sub-circuit 204 is connected to the output end of the second digitally controlled attenuator circuit 2033, and the output end of the first RF switch sub-circuit 204 is connected to the input end of the second RF switch sub-circuit 205.

[0036] Specifically, the first RF switch sub-circuit 204 is disposed in the seventh region 215 , and the seventh region 215 is isolated from the sixth region 214 by the sixth separation groove 209 , thereby further achieving spatial isolation.

[0037] In the embodiment of the present application, the second RF switch subcircuit 205 is arranged in the width direction of the eighth region 216, and the input end of the second RF switch subcircuit 205 is connected to the output end of the first RF switch subcircuit 204 through the first bandwidth selection circuit to the fourth bandwidth selection circuit, respectively, and the output end of the second RF switch subcircuit 205 is connected to the output circuit 206, wherein the first bandwidth selection circuit is arranged near the bottom of the seventh dividing groove 210, and the second bandwidth selection circuit to the fourth bandwidth selection circuit are located in the seventh dividing groove 210. The first bandwidth selection circuit to the fourth bandwidth selection circuit are all bandwidth filter circuits.

[0038] Specifically, there is a wide seventh dividing slot 210 between the second RF switch subcircuit 205 and the first RF switch subcircuit 204, which further realizes the channel isolation of the RF switch. The second RF switch subcircuit 205 and the first RF switch subcircuit 204 select a signal to be selected from the first bandwidth selection circuit to the fourth bandwidth selection circuit whose processing gain meets the requirements, and obtains the output signal after bandwidth selection, wherein the first bandwidth selection circuit to the fourth bandwidth selection circuit can be a bandpass filter circuit with different filtering parameters.

[0039] In an embodiment of the present application, the output circuit 206 is arranged in the width direction of the ninth region 217, and the output circuit 206 may include a tenth amplifier circuit 2061 and an eleventh amplifier circuit 2062, wherein the input end of the tenth amplifier circuit 2061 is connected to the output end of the second RF switch sub-circuit 205; the input end of the eleventh amplifier circuit 2062 is connected to the output end of the tenth amplifier circuit 2061, and the output end of the eleventh amplifier circuit 2062 outputs a frequency conversion signal.

[0040] Specifically, the first amplifier circuit 10711 to the eleventh amplifier circuit 2062 all use low-noise amplifiers, and the low-noise amplifiers all use linear regulators to reduce power supply noise. The target frequency conversion signal is obtained after the output signal after bandwidth selection is processed by the tenth amplifier circuit 2061 and the eleventh amplifier circuit 2062.

[0041] In the embodiment of the utility model, the five-channel frequency conversion module can achieve the following technical indicators: false and clutter level in the output band: ≤-60dBm; (at full gain); output spurious suppression: ≥60dBc test condition 0dBm; channel isolation: ≥70dB; input port standing wave ratio: ≤1.5:1; noise figure: ≤15dB normal mode; noise figure: ≤6.5dB low noise mode; output intermediate frequency band fluctuation: ≤±1dB.

[0042] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A five-channel frequency conversion module, characterized in that: include: Five independent sub-frequency conversion modules, each of which comprises: a first circuit board (100) and a second circuit board (200); A first dividing groove (101) and a second dividing groove (102) are provided in a width direction of the first circuit board (100) at intervals, the first dividing groove (101) and the second dividing groove (102) dividing the first circuit board (100) in a length direction into a first area (104), a second area (105) and a third area (106) which are partially connected in sequence, the third area (106) being divided by the third dividing groove (103) into a first sub-area (1061) and a second sub-area (1062) which are partially connected; The second circuit board (200) is provided with fourth to eighth dividing grooves (207) to (211) at intervals in the width direction, and the fourth to (207) to (211) dividing the second circuit board (200) into fourth areas (212) to ninth areas (217) in sequence in the length direction; The surfaces of the first region (104) to the ninth region (217) are respectively provided with a frequency selection circuit (107), a differential circuit (108), a first mixing filter circuit (109), a second mixing filter circuit (201), a mode selection circuit (202), a gain adjustment circuit (203), a first radio frequency switch sub-circuit (204), a second radio frequency switch sub-circuit (205), and an output circuit (206).

2. The five-channel frequency conversion module according to claim 1, characterized in that: The frequency selection circuit (107) comprises: An input signal line (1071) is arranged in the length direction of the first circuit board (100); A limiter circuit (1072) connected in series with the input signal line (1071) in the length direction of the first circuit board (100); A first radio frequency switch circuit (1073) connected in series with the limiter circuit (1072) in the length direction of the first circuit board (100); A second radio frequency switch circuit (1074) connected to the first radio frequency switch circuit (1073) in the width direction of the first circuit board (100) via parallel wires and a first amplifier circuit (10711); a third radio frequency switch circuit (1075), connected to the second radio frequency switch circuit (1074) in the length direction of the first circuit board (100); a fourth radio frequency switch circuit (1076) connected to the third radio frequency switch circuit (1075) in the length direction of the first circuit board (100) through a first branch circuit to a fourth branch circuit connected in parallel; wherein the first branch to the fourth branch respectively include a first filter circuit group to a fourth filter circuit group arranged in the length direction of the first circuit board (100); a fifth radio frequency switch circuit (1077), arranged near the bottom of the first dividing slot (101), wherein an input end of the fifth radio frequency switch circuit (1077) is respectively connected to an output end of the fourth radio frequency switch circuit (1076) and an output end of the third radio frequency switch circuit (1075) through a fifth branch and a first series-parallel branch; Wherein, the first series-parallel branch includes: A first differential circuit (10710), an input end of which is connected to an output end of the third radio frequency switch circuit (1075); two second amplifier circuits (10712), each input end of which is respectively connected to two output ends of the first differential circuit (10710); A balun circuit (10715), two input ends of which are respectively connected to the output ends of the two second amplifier circuits (10712); A first filter circuit (1079), the input end of which is connected to the output end of the balun circuit (10715), and the output end of the first filter circuit (1079) is connected to the input end of the fifth radio frequency switch circuit (1077); The fifth branch includes: A third amplifier circuit (10713), an input end of which is connected to an output end of the fourth radio frequency switch circuit (1076); The second filter circuit (10714) has an input end connected to the output end of the third amplifier circuit (10713), and an output end of the second filter circuit (10714) is connected to the input end of the fifth radio frequency switch circuit (1077).

3. The five-channel frequency conversion module according to claim 2, characterized in that: The differential circuit (108) comprises: a first attenuator circuit (1081), a third filter circuit (1082) and a second differential circuit (1083) which are sequentially connected in series; The first attenuator circuit (1081) is arranged close to the bottom of the first dividing slot (101), and the third filter circuit (1082) and the second differential circuit (1083) are arranged in sequence in the length direction of the first circuit board (100); The input end of the first attenuator circuit (1081) is connected to the output end of the fifth radio frequency switch circuit (1077), and the two output ends of the second differential circuit (1083) are connected to the input end of the first mixing filter circuit (109).

4. The five-channel frequency conversion module according to claim 3, characterized in that: The first mixing and filtering circuit (109) comprises: A first mixer (1091) is arranged near the bottom of the second dividing slot (102), and two first input terminals of the first mixer (1091) are respectively connected to two output terminals of the second differential circuit (1083); A first signal generating circuit comprises a fourth filter circuit (1093), a fourth amplifier circuit (1092), and a fifth filter circuit (1094) which are connected in series in sequence, one end of the first signal generating circuit is connected to a signal input end of the first circuit board (100), and an output end of the first signal generating circuit is connected to a second input end of the first mixer (1091); a seventh filter circuit (1096), located in the second sub-region (1062) of the first circuit board (100), the input end of the seventh filter circuit (1096) being connected to the output end of the first mixer (1091); A sixth amplifier circuit (1095) is located in the second sub-area (1062) of the first circuit board (100), the input end of the sixth amplifier circuit (1095) is connected to the output end of the seventh filter circuit (1096), and the output end of the sixth amplifier circuit (1095) is connected to the input end of the second mixing filter circuit (201).

5. The five-channel frequency conversion module according to claim 4, characterized in that: The second frequency mixing and filtering circuit (201) is arranged in the width direction of the fourth area (212), and the second frequency mixing and filtering circuit (201) comprises: a seventh amplifier circuit (2011), connected to the output end of the sixth amplifier circuit (1095); an eighth filter circuit (2012), the input end of which is connected to the output end of the seventh amplifier circuit (2011); A second mixer (2013), wherein a first input end is connected to the output end of the eighth filter circuit (2012), a second input end of the second mixer (2013) receives a second local oscillator signal, and an output end of the second mixer (2013) is connected to an input end of the mode selection circuit (202).

6. The five-channel frequency conversion module according to claim 5, characterized in that: The mode selection circuit (202) is arranged in the width direction of the fifth area (213), and the mode selection circuit (202) comprises: a ninth filter circuit (2021), arranged near the bottom of the fourth dividing slot (207), the input end of the ninth filter circuit (2021) being connected to the output end of the second mixer (2013); a sixth radio frequency switch (2022), an input end of which is connected to the output end of the ninth filter circuit (2021); The seventh radio frequency switch (2023) has an input end connected to the output end of the sixth radio frequency switch (2022) via an eighth amplifier circuit (2024) and a wire, and the output end of the seventh radio frequency switch (2023) is connected to the gain adjustment circuit (203).

7. The five-channel frequency conversion module according to claim 6, characterized in that: The gain adjustment circuit (203) is arranged in the width direction of the sixth area (214), and the gain adjustment circuit (203) comprises: A first digitally controlled attenuator circuit (2031), an input end of which is connected to the output end of the seventh radio frequency switch (2023); a ninth amplifier circuit (2032), the input end of which is connected to the output end of the first digitally controlled attenuator circuit (2031); The second digitally controlled attenuator circuit (2033) has an input end connected to the output end of the ninth amplifier circuit (2032), and an output end of the second digitally controlled attenuator circuit (2033) connected to the input end of the first radio frequency switch sub-circuit (204).

8. The five-channel frequency conversion module according to claim 7, characterized in that: The first radio frequency switch sub-circuit (204) is arranged in the width direction of the seventh region (215), the input end of the first radio frequency switch sub-circuit (204) is connected to the output end of the second digitally controlled attenuator circuit (2033), and the output end of the first radio frequency switch sub-circuit (204) is connected to the input end of the second radio frequency switch sub-circuit (205).

9. The five-channel frequency conversion module according to claim 8, characterized in that: The second radio frequency switch sub-circuit (205) is arranged in the width direction of the eighth region (216); the input end of the second radio frequency switch sub-circuit (205) is connected to the output end of the first radio frequency switch sub-circuit (204) through the first bandwidth selection circuit to the fourth bandwidth selection circuit respectively; the output end of the second radio frequency switch sub-circuit (205) is connected to the output circuit (206); wherein the first bandwidth selection circuit is arranged close to the bottom of the seventh dividing groove (210), and the second bandwidth selection circuit to the fourth bandwidth selection circuit are located in the seventh dividing groove (210).

10. The five-channel frequency conversion module according to claim 9, characterized in that: The output circuit (206) is arranged in the width direction of the ninth region (217), and the output circuit (206) comprises: a tenth amplifier circuit (2061), the input end of which is connected to the output end of the second radio frequency switch sub-circuit (205); The eleventh amplifier circuit (2062) has an input end connected to the output end of the tenth amplifier circuit (2061), and the output end of the eleventh amplifier circuit (2062) outputs a frequency conversion signal.

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