A multi-channel up-down converter with a switching network

Abstract

The present invention discloses a multi-channel up-down converter with a switch network, which relates to the field of microwave radio frequency circuit technology. The present invention includes a first group of switches to an eighth group of switches, a first down-converter to an eighth down-converter, a first up-converter, and a second up-converter. In the first group of switches to the seventh group of switches, a plurality of single-pole double-throw switches are designed to select a plurality of radio frequency input signals and output them to the first down-converter to the eighth down-converter; in the fifth group of switches and the eighth group of switches, a plurality of single-pole double-throw switches and power dividers are designed to select two channels of radio frequency signals for output. The present invention uses a switch network composed of a plurality of groups of switches to enable the multi-channel up-down converter to support a greater variety and quantity of radio frequency signals without increasing the number of channels, and to flexibly select among different types of signals by switching between different states of each group of switches.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave radio frequency circuits, and in particular to a multi-channel up / down converter with a switch network. Background Art

[0002] Multichannel up / down converters are essential components of RF transceiver systems, performing frequency conversion, gain amplification, and signal filtering for multiple signals. Typically, these converters must maintain amplitude and phase consistency across channels. Traditional multichannel up / down converters offer limited functionality, capable of up / down conversion for a limited number of signals. To accommodate a wider variety and number of signals, more up / down converters are required, increasing system size, weight, and cost. Summary of the Invention

[0003] In light of this, the present invention proposes a multi-channel up / down converter with a switch network. This method enables the multi-channel up / down converter to support a wider variety and number of RF signals without increasing the number of channels. By switching between different states of each switch group, it can flexibly select among different signal types, enabling the system to achieve multiple operating modes.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A multi-channel up-down converter with a switch network, comprising a first to an eighth group of switches 1-8, a first to an eighth down-converter 9-16, a first up-converter 17, and a second up-converter 18;

[0006] In the down-conversion process, the first group of switches 1 and the second group of switches 2 each receive 8 RF signals and output 4 RF signals respectively; the fifth group of switches 5 receives 16 RF signals and outputs 8 RF signals to the sixth group of switches 6 and the seventh group of switches 7 respectively, and the sixth group of switches 6 and the seventh group of switches 7 respectively output 4 RF signals; the third group of switches 3 is used to receive the 16 RF signals output by the first group of switches 1, the second group of switches 2, the sixth group of switches 6 and the seventh group of switches 7, and output 8 of them; the fourth group of switches 4 is used to output the 8 RF signals output by the third group of switches 3 in a corresponding or staggered manner to the first down-converter to the eighth down-converter 9-16; the first down-converter to the eighth down-converter 9-16 are used to down-convert the 8 RF signals output by the fourth group of switches 4 to obtain 8 intermediate frequency signals;

[0007] During the up-conversion process, the first up-converter 17 and the second up-converter 18 respectively receive one intermediate frequency signal, up-convert it into one radio frequency signal, and then output it to the eighth group of switches 8; the eighth group of switches 8 outputs two radio frequency signals to the fifth group of switches 5, and outputs them to the external device through the fifth group of switches 5.

[0008] Furthermore, the fifth switch group 5 includes 16 single-pole double-throw switches;

[0009] During the down-conversion process, the common ports of the 16 single-pole double-throw switches of the fifth switch group 5 each receive one RF signal input from the outside, and the first ports of eight of the single-pole double-throw switches of the fifth switch group 5 each output one RF signal to the sixth switch group 6; the first ports of the remaining eight single-pole double-throw switches each output one RF signal to the seventh switch group 7;

[0010] During the up-conversion process, the second ports of the two single-pole double-throw switches respectively receive one channel of RF signal output by the eighth group of switches 8 and output it to the outside through the corresponding common port;

[0011] Furthermore, for the 16 single-pole double-throw switches of the fifth switch group (5), the gating state of the first port or the second port remains consistent.

[0012] Furthermore, the first switch group 1, the second switch group 2, the sixth switch group 6 and the seventh switch group 7 each include four single-pole double-throw switches;

[0013] During the down-conversion process, for each single-pole double-throw switch in the first group of switches 1 and the second group of switches 2, the first port and the second port respectively receive a radio frequency signal of the first frequency band input from the outside, and the common port outputs the radio frequency signal of the first port or the second port;

[0014] For each single-pole double-throw switch in the sixth group of switches 6 and the seventh group of switches 7, its first port and second port are respectively connected to the first port of a single-pole double-throw switch in the fifth group of switches 5, receiving one RF signal, and its common port outputs one RF signal from the first port or the second port.

[0015] Furthermore, the third switch group 3 includes 8 single-pole double-throw switches;

[0016] During the down-conversion process, for each single-pole double-throw switch in the third group of switches 3, its first port is connected to a common port in the first group of switches 1 or the second group of switches 2, respectively, to receive a radio frequency signal output by the first group of switches 1 or the second group of switches 2; its second port is connected to a common port in the sixth group of switches 6 or the seventh group of switches 7, respectively, to receive a radio frequency signal input by the sixth group of switches 6 or the seventh group of switches 7; the common port of the eight single-pole double-throw switches outputs one radio frequency signal from the first port or the second port.

[0017] Furthermore, the fourth switch group 4 includes two columns of switch groups, each column of switch groups includes 8 single-pole double-throw switches;

[0018] During the down-conversion process, for each single-pole double-throw switch in the first column of the switch group of the fourth group of switches 4, its common port is respectively connected to one common port in the third group of switches 3 to receive one RF signal output by the third group of switches 3; for the first four single-pole double-throw switches in the first column of the switch group, its first port is connected to the first port of the first four single-pole double-throw switches in the second column of the switch group, and its second port is connected to the second port of the last four single-pole double-throw switches in the second column of the switch group; for the last four single-pole double-throw switches in the first column of the switch group, its first port is connected to the first port of the last four single-pole double-throw switches in the second column of the switch group, and its second port is connected to the second port of the first four single-pole double-throw switches in the second column of the switch group;

[0019] For each single-pole double-throw switch in the second column of switch groups of the fourth group of switches 4, its common port outputs one RF signal in the first port or the second port; and for the two columns of switch groups of the fourth group of switches 4, the selection state of the single-pole double-throw switches for selecting the first port or the second port remains consistent.

[0020] Furthermore, the first to eighth down-converters 9-16 respectively receive one channel of radio frequency signals inputted by the fourth group of switches 4 and down-convert them to obtain eight channels of intermediate frequency signals.

[0021] Among them, the first down-converter to the eighth down-converter 9-16 all include a first RF digitally controlled attenuator, a first RF amplifier, a first RF filter, a first mixer, a first intermediate frequency filter, a first intermediate frequency amplifier, a first intermediate frequency digitally controlled attenuator, a second intermediate frequency filter and a second intermediate frequency amplifier connected in sequence, and the first mixer also receives a down-converted local oscillator signal; the first RF digitally controlled attenuator is connected to the common port of one single-pole double-throw switch in the second column switch group of the fourth group of switches 4, receives one RF signal output by the fourth group of switches 4, and the second intermediate frequency amplifier outputs one intermediate frequency signal respectively.

[0022] Furthermore, the first up-converter 17 and the second up-converter 18 respectively receive one channel of intermediate frequency signal, up-convert it into one channel of radio frequency signal and then output it to the eighth group of switches 8;

[0023] Among them, the first up-converter 17 and the second up-converter 18 both include a third intermediate frequency filter, a second mixer, a second radio frequency filter, a second radio frequency amplifier, a second radio frequency digitally controlled attenuator, a third radio frequency amplifier and a third radio frequency filter connected in sequence, and the second mixer also receives the up-converted local oscillator signal; the third intermediate frequency filter receives one intermediate frequency signal input from the outside, and the third radio frequency filter outputs one radio frequency signal to the eighth group of switches 8 respectively.

[0024] Furthermore, the eighth switch group 8 includes two columns of switch groups and eight 1-to-2 power dividers, the first column of switch groups includes two single-pole double-throw switches, and the second column of switch groups includes four single-pole double-throw switches;

[0025] During the up-conversion process, for each single-pole double-throw switch in the first column switch group of the eighth group of switches 8, its common port is connected to one of the third RF filters to receive a RF signal output by the third RF filter, and its first port and second port are respectively connected to the common port of a single-pole double-throw switch in the second column switch group; for each single-pole double-throw switch in the second column switch group, its first port and second port are respectively connected to the signal input port of a 1-to-2 power splitter; and the two signal output ports of the 1-to-2 power splitter are respectively connected to the second port of a single-pole double-throw switch in the fifth group of switches 5.

[0026] Furthermore, the single-pole double-throw switches in the fifth switch group 5 are controlled by external monitoring using differential levels, and the single-pole double-throw switches in the remaining switch groups are controlled by external monitoring serial port commands.

[0027] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0028] The present invention enables the multi-channel up-down converter to support a wider variety and number of RF signals without increasing the number of channels. By switching between different states of each group of switches, it can flexibly select among different types of signals and cooperate with the system to realize multiple operating modes. Regardless of the state of the switch network, the channels have amplitude and phase consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The figure is an overall principle block diagram of a multi-channel up-down converter with a switch network in an embodiment of the present invention.

[0030] Figure 2 This is a principle block diagram of the first group of switches in an embodiment of the present invention.

[0031] Figure 3 This is a principle block diagram of the second group of switches in the present invention.

[0032] Figure 4 This is a principle block diagram of the third group of switches in the present invention.

[0033] Figure 5 This is a principle block diagram of the fourth group of switches in the present invention.

[0034] Figure 6 This is a principle block diagram of the fifth group of switches in the present invention.

[0035] Figure 7 This is a principle block diagram of the sixth group of switches in the present invention.

[0036] Figure 8 This is a principle block diagram of the seventh switch group in the present invention.

[0037] Figure 9 This is a principle block diagram of the eighth group of switches in the present invention.

[0038] Figure 10 This is a principle block diagram of eight down converters in the present invention.

[0039] Figure 11 It is a principle block diagram of two up-converters in the present invention. DETAILED DESCRIPTION

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] A multi-channel up-down converter with a switching network, such as Figure 1 As shown, it includes the first to eighth switch groups 1-8, the first to eighth down converters 9-16, the first up converter 17 and the second up converter 18;

[0042] In the down-conversion process, the first group of switches 1 and the second group of switches 2 each receive 8 RF signals and output 4 RF signals respectively; the fifth group of switches 5 receives 16 RF signals and outputs 8 RF signals to the sixth group of switches 6 and the seventh group of switches 7 respectively, and the sixth group of switches 6 and the seventh group of switches 7 respectively output 4 RF signals; the third group of switches 3 is used to receive the 16 RF signals output by the first group of switches 1, the second group of switches 2, the sixth group of switches 6 and the seventh group of switches 7, and output 8 of them; the fourth group of switches 4 is used to output the 8 RF signals output by the third group of switches 3 in a corresponding or staggered manner to the first down-converter to the eighth down-converter 9-16; the first down-converter to the eighth down-converter 9-16 are used to down-convert the 8 RF signals output by the fourth group of switches 4 to obtain 8 intermediate frequency signals;

[0043] Specifically, in this embodiment, the radio frequency signals received by the first group of switches 1 and the second group of switches 2 belong to the first frequency band, and the radio frequency signals received by the fifth group of switches 5 belong to the second frequency band;

[0044] During the up-conversion process, the first up-converter 17 and the second up-converter 18 respectively receive one intermediate frequency signal, up-convert it into one radio frequency signal, and then output it to the eighth group of switches 8; the eighth group of switches 8 outputs two radio frequency signals to the fifth group of switches 5, and outputs them to the external device through the fifth group of switches 5.

[0045] Further, if Figure 6 As shown, the fifth switch group 5 includes 16 single-pole double-throw switches;

[0046] During the down-conversion process, the common ports of the 16 single-pole double-throw switches of the fifth switch group 5 each receive one RF signal input from the outside, and the first ports of eight of the single-pole double-throw switches of the fifth switch group 5 each output one RF signal to the sixth switch group 6; the first ports of the remaining eight single-pole double-throw switches each output one RF signal to the seventh switch group 7;

[0047] During the up-conversion process, the second ports of the two single-pole double-throw switches respectively receive one channel of RF signal output by the eighth group of switches 8 and output it to the outside through the corresponding common port;

[0048] Furthermore, for the 16 single-pole double-throw switches of the fifth switch group (5), the gating state of the first port or the second port remains consistent.

[0049] Furthermore, the first switch group 1, the second switch group 2, the sixth switch group 6 and the seventh switch group 7 each include four single-pole double-throw switches;

[0050] During the down-conversion process, Figure 2 、 Figure 3 As shown, for each single-pole double-throw switch in the first group of switches 1 and the second group of switches 2, the first port and the second port respectively receive a radio frequency signal of the first frequency band input from the outside, and the common port outputs the radio frequency signal of the first port or the second port;

[0051] Specifically, in this embodiment, the gating state of each single-pole double-throw switch in the first group of switches 1 and the second group of switches 2 for gating the first port or the second port is consistent;

[0052] like Figure 7 、 Figure 8 As shown, for each single-pole double-throw switch in the sixth group of switches 6 and the seventh group of switches 7, its first port and second port are respectively connected to the first port of a single-pole double-throw switch in the fifth group of switches 5, receiving one RF signal, and its common port outputs one RF signal from the first port or the second port.

[0053] Specifically, in this embodiment, the gating state of each single-pole double-throw switch in the sixth group of switches 6 and the seventh group of switches 7 for gating the first port or the second port is consistent;

[0054] Further, if Figure 4 As shown, the third switch group 3 includes 8 single-pole double-throw switches;

[0055] During the down-conversion process, for each single-pole double-throw switch in the third group of switches 3, its first port is connected to a common port in the first group of switches 1 or the second group of switches 2, respectively, to receive a radio frequency signal output by the first group of switches 1 or the second group of switches 2; its second port is connected to a common port in the sixth group of switches 6 or the seventh group of switches 7, respectively, to receive a radio frequency signal input by the sixth group of switches 6 or the seventh group of switches 7; the common port of the eight single-pole double-throw switches outputs one radio frequency signal from the first port or the second port.

[0056] Specifically, in this embodiment, the gating state of each single-pole double-throw switch in the third switch group 3 for gating the first port or the second port remains consistent; by switching the gating state, 8 radio frequency signals of the first frequency band or 8 radio frequency signals of the second frequency band are output;

[0057] Further, if Figure 5 As shown, the fourth switch group 4 includes two columns of switch groups, and each column of switch groups includes 8 single-pole double-throw switches;

[0058] During the down-conversion process, for each single-pole double-throw switch in the first column of the switch group of the fourth group of switches 4, its common port is respectively connected to one common port in the third group of switches 3 to receive one RF signal output by the third group of switches 3; for the first four single-pole double-throw switches in the first column of the switch group, its first port is connected to the first port of the first four single-pole double-throw switches in the second column of the switch group, and its second port is connected to the second port of the last four single-pole double-throw switches in the second column of the switch group; for the last four single-pole double-throw switches in the first column of the switch group, its first port is connected to the first port of the last four single-pole double-throw switches in the second column of the switch group, and its second port is connected to the second port of the first four single-pole double-throw switches in the second column of the switch group;

[0059] For each single-pole double-throw switch in the second column of switch groups of the fourth group of switches 4, its common port outputs one RF signal in the first port or the second port; and for the two columns of switch groups of the fourth group of switches 4, the selection state of the single-pole double-throw switches for selecting the first port or the second port remains consistent.

[0060] Furthermore, the first to eighth down-converters 9-16 respectively receive one channel of radio frequency signals inputted by the fourth group of switches 4 and down-convert them to obtain eight channels of intermediate frequency signals.

[0061] Among them, Figure 10As shown, the first down-converter to the eighth down-converter 9-16 all include a first RF digitally controlled attenuator, a first RF amplifier, a first RF filter, a first mixer, a first intermediate frequency filter, a first intermediate frequency amplifier, a first intermediate frequency digitally controlled attenuator, a second intermediate frequency filter and a second intermediate frequency amplifier connected in sequence, and the first mixer also receives a down-converted local oscillator signal; the first RF digitally controlled attenuator is connected to the common port of one single-pole double-throw switch in the second column switch group of the fourth group of switches 4, receives one RF signal output by the fourth group of switches 4, and the second intermediate frequency amplifier outputs one intermediate frequency signal respectively.

[0062] Furthermore, the first up-converter 17 and the second up-converter 18 respectively receive one channel of intermediate frequency signal, up-convert it into one channel of radio frequency signal and then output it to the eighth group of switches 8;

[0063] Among them, Figure 11 As shown, the first up-converter 17 and the second up-converter 18 both include a third intermediate frequency filter, a second mixer, a second radio frequency filter, a second radio frequency amplifier, a second radio frequency digitally controlled attenuator, a third radio frequency amplifier and a third radio frequency filter connected in sequence, and the second mixer also receives an up-converted local oscillator signal; the third intermediate frequency filter receives one intermediate frequency signal input from the outside, and the third radio frequency filter outputs one radio frequency signal to the eighth group of switches 8 respectively.

[0064] Further, if Figure 9 As shown, the eighth switch group 8 includes two columns of switch groups and eight 1-to-2 power dividers, the first column of switch groups includes two single-pole double-throw switches, and the second column of switch groups includes four single-pole double-throw switches;

[0065] During the up-conversion process, for each single-pole double-throw switch in the first column switch group of the eighth group of switches 8, its common port is connected to one of the third RF filters to receive a RF signal output by the third RF filter, and its first port and second port are respectively connected to the common port of a single-pole double-throw switch in the second column switch group; for each single-pole double-throw switch in the second column switch group, its first port and second port are respectively connected to the signal input port of a 1-to-2 power splitter; and the two signal output ports of the 1-to-2 power splitter are respectively connected to the second port of a single-pole double-throw switch in the fifth group of switches 5.

[0066] Furthermore, the single-pole double-throw switches in the fifth switch group (5) are controlled by externally monitored differential voltage levels, with a response time in the nanosecond order. The single-pole double-throw switches in the remaining switch groups are controlled by externally monitored serial port commands, with a response time in the millisecond order. Regardless of the state of the switch network, the amplitude and phase of all receive channels remain consistent, and the amplitude and phase of all transmit channels remain consistent.

[0067] Specifically, in this embodiment, the single-pole double-throw switches are of models VD7526 and HGC1015LP3; by switching the selection state, two channel states between the common port and the first port and between the common port and the second port are realized. In the downconverter, the mixer model is HGC536H, the RF digitally controlled attenuator model is VD74167, the intermediate frequency digitally controlled attenuator model is VD74171, the RF amplifier model is HGC444, the intermediate frequency amplifier models are HGC301-2 and HGC301-1, and the local oscillator phase-locked loop model is GM4704B; in the upconverter, the mixer model is HGC536HMLP3, the digitally controlled attenuator model is SIAT082SP4, the amplifier models are ILA-0112E-PQ3 and IPA-0612D-CQ5, and the local oscillator phase-locked loop model is XND704MQI.

[0068] After the design and processing of this example were completed, the switches in the measured switching network switched normally, and all functional performance indicators met system requirements. The amplitude consistency between channels was better than ±1dB, and the phase consistency was better than ±10°. The device operated normally in the system and was stable and reliable.

[0069] In summary, the present invention enables the multi-channel up-down converter to support a wider variety and number of RF signals without increasing the number of channels. By switching between different states of each group of switches, it can flexibly select among different types of signals and cooperate with the system to realize multiple working modes.

[0070] Those skilled in the art will appreciate that the embodiments described are intended to help readers understand the principles of the present invention and should be understood that the scope of protection of the present invention is not limited to the embodiments described. It will be apparent to those skilled in the art that various modifications and variations are possible in the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A multi-channel up-down converter with a switching network, characterized in that: It includes a first group of switches to an eighth group of switches (1-8), a first down-converter to an eighth down-converter (9-16), a first up-converter (17) and a second up-converter (18); In the down-conversion process, the first group of switches (1) and the second group of switches (2) each receive 8-channel radio frequency signals and output 4-channel radio frequency signals respectively; the fifth group of switches (5) receives 16-channel radio frequency signals and outputs 8-channel radio frequency signals to the sixth group of switches (6) and the seventh group of switches (7), and the sixth group of switches (6) and the seventh group of switches (7) output 4-channel radio frequency signals respectively; the third group of switches (3) is used to receive 16-channel radio frequency signals output by the first group of switches (1), the second group of switches (2), the sixth group of switches (6) and the seventh group of switches (7), and output 8-channel radio frequency signals; the fourth group of switches (4) is used to output the 8-channel radio frequency signals output by the third group of switches (3) to the first down-converter to the eighth down-converter (9-16) in a corresponding or staggered manner; the first down-converter to the eighth down-converter (9-16) are used to down-convert the 8-channel radio frequency signals output by the fourth group of switches (4) to obtain 8-channel intermediate frequency signals; The fifth switch group (5) includes 16 single-pole double-throw switches; During the down-conversion process, the common ports of the 16 single-pole double-throw switches of the fifth switch group (5) each receive one channel of radio frequency signal input from the outside, and the first ports of eight of the single-pole double-throw switches of the fifth switch group (5) each output one channel of radio frequency signal to the sixth switch group (6); and the first ports of the remaining eight single-pole double-throw switches each output one channel of radio frequency signal to the seventh switch group (7); During the up-conversion process, the second ports of the two single-pole double-throw switches respectively receive a radio frequency signal output by the eighth group of switches (8), and output it to the outside through the corresponding common port; And for the 16 single-pole double-throw switches of the fifth switch group (5), the gating state of the first port or the second port remains consistent; The fourth switch group (4) includes two columns of switch groups, each column of switch groups includes 8 single-pole double-throw switches; During the down-conversion process, for each single-pole double-throw switch in the first column switch group of the fourth switch group (4), its common port is respectively connected to one common port in the third group of switches (3) to receive one channel of radio frequency signal output by the third group of switches (3); for the first four single-pole double-throw switches in the first column switch group, its first port is connected to the first port of the first four single-pole double-throw switches in the second column switch group, and its second port is connected to the second port of the last four single-pole double-throw switches in the second column switch group; for the last four single-pole double-throw switches in the first column switch group, its first port is connected to the first port of the last four single-pole double-throw switches in the second column switch group, and its second port is connected to the second port of the first four single-pole double-throw switches in the second column switch group; For each single-pole double-throw switch in the second column of the switch group of the fourth switch group (4), the common port thereof outputs one RF signal in the first port or the second port; and for the two columns of the switch groups of the fourth switch group (4), the gating state of the single-pole double-throw switches in the first port or the second port remains consistent; During the up-conversion process, the first up-converter (17) and the second up-converter (18) respectively receive one intermediate frequency signal, up-convert it into one radio frequency signal, and then output it to the eighth group of switches (8); the eighth group of switches (8) outputs the two radio frequency signals to the fifth group of switches (5), and outputs them to the external device through the fifth group of switches (5).

2. The multi-channel up-down converter with a switch network according to claim 1, characterized in that: The first switch group (1), the second switch group (2), the sixth switch group (6) and the seventh switch group (7) each include four single-pole double-throw switches; During the down-conversion process, for each single-pole double-throw switch in the first group of switches (1) and the second group of switches (2), the first port and the second port respectively receive one channel of radio frequency signal input from the outside, and the common port outputs one channel of radio frequency signal from the first port or the second port; For each single-pole double-throw switch in the sixth group of switches (6) and the seventh group of switches (7), the first port and the second port thereof are respectively connected to the first port of a single-pole double-throw switch in the fifth group of switches (5), receive one channel of radio frequency signal, and the common port thereof outputs one channel of radio frequency signal from the first port or the second port.

3. The multi-channel up-down converter with a switch network according to claim 2, characterized in that: The third switch group (3) includes 8 single-pole double-throw switches; During the down-conversion process, for each single-pole double-throw switch in the third group of switches (3), its first port is respectively connected to a common port in the first group of switches (1) or the second group of switches (2), and receives a radio frequency signal output by the first group of switches (1) or the second group of switches (2); its second port is respectively connected to a common port in the sixth group of switches (6) or the seventh group of switches (7), and receives a radio frequency signal input by the sixth group of switches (6) or the seventh group of switches (7); and the common ports of the eight single-pole double-throw switches output the radio frequency signal in the first port or the second port.

4. The multi-channel up-down converter with a switch network according to claim 3, characterized in that: The first to eighth down-converters (9-16) respectively receive one channel of radio frequency signals inputted by the fourth group of switches (4), and down-convert them to obtain eight channels of intermediate frequency signals; Among them, the first down-converter to the eighth down-converter (9-16) all include a first RF digitally controlled attenuator, a first RF amplifier, a first RF filter, a first mixer, a first intermediate frequency filter, a first intermediate frequency amplifier, a first intermediate frequency digitally controlled attenuator, a second intermediate frequency filter and a second intermediate frequency amplifier connected in sequence, and the first mixer also receives a down-converted local oscillator signal; the first RF digitally controlled attenuator is connected to the common port of one single-pole double-throw switch in the second column switch group of the fourth group of switches (4), receives one RF signal output by the fourth group of switches (4), and the second intermediate frequency amplifier outputs one intermediate frequency signal correspondingly.

5. The multi-channel up-down converter with a switch network according to claim 4, characterized in that: The first up-converter (17) and the second up-converter (18) respectively receive one intermediate frequency signal, up-convert it into one radio frequency signal, and then output it to the eighth group of switches (8); The first up-converter (17) and the second up-converter (18) each include a third intermediate frequency filter, a second mixer, a second radio frequency filter, a second radio frequency amplifier, a second radio frequency digitally controlled attenuator, a third radio frequency amplifier and a third radio frequency filter connected in sequence, and the second mixer also receives an up-converted local oscillator signal; the third intermediate frequency filter receives one intermediate frequency signal input from the outside, and the third radio frequency filter outputs one radio frequency signal to the eighth group of switches (8) respectively.

6. The multi-channel up-down converter with a switch network according to claim 5, characterized in that: The eighth switch group (8) includes two switch groups and eight 1-to-2 power dividers, the first switch group includes two single-pole double-throw switches, and the second switch group includes four single-pole double-throw switches; During the up-conversion process, for each single-pole double-throw switch in the first column switch group of the eighth group of switches (8), its common port is connected to one of the third radio frequency filters to receive a radio frequency signal output by the third radio frequency filter, and its first port and second port are respectively connected to the common port of one single-pole double-throw switch in the second column switch group; for each single-pole double-throw switch in the second column switch group, its first port and second port are respectively connected to the signal input port of a 1-to-2 power splitter; and the two signal output ports of the 1-to-2 power splitter are respectively connected to the second port of one single-pole double-throw switch in the fifth group of switches (5).

7. The multi-channel up-down converter with a switch network according to claim 6, characterized in that: The single-pole double-throw switches in the fifth switch group (5) are controlled by external monitoring using differential level, and the single-pole double-throw switches in the remaining switch groups are controlled by external monitoring serial port commands.

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