CN215072329U - Multichannel intermediate frequency pretreatment system - Google Patents
Multichannel intermediate frequency pretreatment system Download PDFInfo
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- CN215072329U CN215072329U CN202120923083.7U CN202120923083U CN215072329U CN 215072329 U CN215072329 U CN 215072329U CN 202120923083 U CN202120923083 U CN 202120923083U CN 215072329 U CN215072329 U CN 215072329U
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Abstract
The utility model provides a multi-channel intermediate frequency pretreatment system, which comprises a control power supply module, a VPX interface board, a radio frequency front end module, a frequency source module and a plurality of frequency conversion modules, wherein the control power supply module is respectively connected with the radio frequency front end module, the frequency source module, the VPX interface board and the plurality of frequency conversion modules, the radio frequency front end module is respectively connected with the plurality of frequency conversion modules and is used for providing radio frequency signals for the frequency conversion modules, the frequency source module is used for providing local oscillator signals for the frequency conversion modules, the frequency conversion modules are used for sequentially carrying out frequency conversion twice on input radio frequency signals to obtain intermediate frequency signals, the VPX interface board is provided with a radio frequency input interface which is connected with the radio frequency front end module and is used for radio frequency input, the frequency conversion module is connected with a plurality of intermediate frequency output interfaces for intermediate frequency output, and the frequency source module is connected with a reference signal input interface for reference signal input and a clock signal output interface for clock signal output; the utility model discloses have a plurality of frequency conversion passageways, simple structure, convenient to use.
Description
Technical Field
The utility model relates to a radio frequency communication technical field particularly, relates to a multichannel intermediate frequency pretreatment systems.
Background
The frequency conversion is divided into up-conversion and down-conversion, the main function is to convert a low-frequency signal into a high-frequency signal or convert a high-frequency signal into a low-frequency signal, and simultaneously amplify, filter and gain control the signal, and the frequency conversion processing is an indispensable part of system equipment such as modern radar, electronic countermeasure, remote measurement, remote control and the like. Along with the development of technology, for the needs of quick measurement, can use a plurality of signals simultaneously usually, just at this moment need a plurality of frequency conversion channels to use simultaneously, but frequency conversion equipment adopts the single channel mode more, when needs use a plurality of frequency conversion channels, only need purchase a plurality of solitary frequency conversion equipment, purchase with high costs, occupation space is big, the consumption is high, it is inconvenient to use.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a multichannel intermediate frequency pretreatment systems, it includes many frequency conversion passageways, many frequency conversion passageways independent output, simple structure, convenient to use.
The embodiment of the utility model discloses a realize through following technical scheme:
a multichannel intermediate frequency preprocessing system comprises a control power module, a radio frequency front end module, a frequency source module and a plurality of frequency conversion modules, wherein the control power module is respectively connected with the radio frequency front end module, the frequency source module and the frequency conversion modules, the radio frequency front end module is respectively connected with the frequency conversion modules, and the frequency source module is respectively connected with the frequency conversion modules.
Preferably, the multichannel intermediate frequency preprocessing system further includes a VPX interface board, the VPX interface board is provided with a plurality of interfaces, and the control power supply module, the radio frequency front end module, the frequency source module, and the plurality of frequency conversion modules are respectively connected to the VPX interface board.
Preferably, the plurality of interfaces include a radio frequency input interface, a reference signal input interface, a clock signal output interface, and a plurality of intermediate frequency output interfaces, and the number of intermediate frequency output interfaces is the same as the number of frequency conversion modules.
Preferably, the radio frequency front end module includes a first band-pass filter, a limiter, a first low-noise amplifier, a first numerical control attenuator, a second low-noise amplifier, a first low-pass filter, an equalizer, and a multi-path power divider, which are connected in sequence, an input end of the first band-pass filter is connected to the radio frequency input interface, and a plurality of output ends of the multi-path power divider are correspondingly connected to input ends of the plurality of frequency conversion modules.
Preferably, the frequency conversion module includes a first attenuator, a first mixer, a second attenuator, a second band-pass filter, a first amplifier, a third band-pass filter, a third attenuator, a second mixer, a fourth attenuator, a second low-pass filter, a second amplifier, a second digitally-controlled attenuator, a third amplifier, a pre-selection switch filter bank, a coupler, and a third low-pass filter, which are connected in sequence, an input end of the first attenuator is connected to one of output ends of the multi-path power divider, an output end of the third low-pass filter is connected to the intermediate frequency output interface, and the first mixer and the second mixer are connected to the frequency source module respectively.
Preferably, the output end of the coupler is also connected with a detector.
Preferably, the control power supply module comprises an FPGA chip, a FLASH memory, a crystal oscillator, a temperature detection module and a JTAG module, and the FPGA chip is connected with the FLASH memory, the crystal oscillator temperature detection module and the JTAG module respectively.
Preferably, the crystal oscillator is 100 MHz.
Preferably, the number of the frequency conversion modules is four, and the multi-path power divider is a four-path power divider.
Preferably, the plurality of interfaces further comprise a control interface, and the control power supply module is connected with the control interface.
The utility model discloses technical scheme has following advantage and beneficial effect at least:
the utility model has a plurality of frequency conversion modules and a plurality of frequency conversion channels, can simultaneously complete independent output of a plurality of intermediate frequency signals, and has simple structure and low cost;
the utility model relates to a rationally, simple structure, the practicality is strong.
Drawings
Fig. 1 is a schematic structural diagram of a multi-channel intermediate frequency pretreatment system provided in embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a radio frequency front end module provided in embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of a frequency conversion module provided in embodiment 1 of the present invention;
icon: 1-a first band-pass filter, 2-a limiter, 3-a first low-noise amplifier, 4-a first digitally controlled attenuator, 5-a second low-noise amplifier, 6-a first low-pass filter, 7-an equalizer, 8-a multi-way power divider, 9-a first attenuator, 10-a first mixer, 11-a second attenuator, 12-a second band-pass filter, 13-a first amplifier, 14-a third band-pass filter, 15-a third attenuator, 16-a second mixer, 17-a fourth attenuator, 18-a second low-pass filter, 19-a second amplifier, 20-a second digitally controlled attenuator, 21-a third amplifier, 22-a bank of switching filters, 23-a coupler, 24-a third low-pass filter, 25-a detector.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Example 1
As shown in fig. 1-3, a multi-channel intermediate frequency preprocessing system includes a control power module, a radio frequency front end module, a frequency source module, and a plurality of frequency conversion modules, wherein the control power module is respectively connected to the radio frequency front end module, the frequency source module, and the plurality of frequency conversion modules, the radio frequency front end module is respectively connected to the plurality of frequency conversion modules, and the frequency source is respectively connected to the plurality of frequency conversion modules. The control power module is used for respectively providing power for the radio frequency front end module, the frequency source module and the plurality of frequency conversion modules and controlling or debugging components in each module, the radio frequency front end module provides radio frequency signals for the plurality of frequency conversion modules, the frequency conversion modules are used for carrying out down-conversion processing on the radio frequency signals into intermediate frequency signals, and the frequency source module respectively provides local oscillation signals for the plurality of frequency conversion modules and participates in frequency mixing processing in the frequency conversion modules. In this embodiment, the number of the frequency conversion modules is 4, and the system is a 4-channel intermediate frequency preprocessing system.
The multi-channel intermediate frequency preprocessing system further comprises a VPX interface board, wherein a plurality of interfaces are arranged on the VPX interface board, and the control power supply module, the radio frequency front-end module, the frequency source module and the frequency conversion modules are respectively connected with the VPX interface board.
The plurality of interfaces comprise a radio frequency input interface, a reference signal input interface, a clock signal output interface and a plurality of intermediate frequency output interfaces, and the number of the intermediate frequency output interfaces is the same as that of the frequency conversion modules. The specific radio frequency input interface is connected with the input end of the radio frequency front-end module, the reference signal input interface is connected with the input end of the frequency source module, and the clock signal output interface is connected with the output end of the frequency source module, correspondingly, in this embodiment, the sum of the number of the intermediate frequency output interfaces is 4, and the intermediate frequency output interface is connected with the output end of the frequency conversion module.
The radio frequency front end module comprises a first band-pass filter 1, an amplitude limiter 2, a first low-noise amplifier 3, a first numerical control attenuator 4, a second low-noise amplifier 5, a first low-pass filter 6, an equalizer 7 and a multi-path power divider 8 which are connected in sequence, the input end of the first band-pass filter 1 is connected with the radio frequency input interface, and a plurality of output ends of the multi-path power divider 8 are correspondingly connected with the input end of the frequency conversion module. In this embodiment, the multi-path power divider 8 is matched with the number of the plurality of frequency conversion modules, the multi-path power divider 8 is a 4-path power divider, a 950MHz-2150MHz radio frequency signal enters the radio frequency front end module from the radio frequency input interface, and is distributed into 4 paths of radio frequency signals by the 4-path power divider after passing through the amplification and filtering functions of the first band-pass filter 1, the amplitude limiter 2, the first low noise amplifier 3, the first numerical control attenuator 4, the second low noise amplifier 5, the first low pass filter 6 and the equalizer in sequence, each 1 path of radio frequency signal is input into 1 frequency conversion module respectively, and a 300MHz intermediate frequency signal is obtained through frequency conversion processing by the frequency conversion modules.
The frequency conversion module comprises a first attenuator 9, a first mixer 10, a second attenuator 11, a second band-pass filter 12, a first amplifier 13, a third band-pass filter 14, a third attenuator 15, a second mixer 16, a fourth attenuator 17, a second low-pass filter 18, a second amplifier 19, a second digital attenuator 20, a third amplifier 21, a preselection switch filter bank 22, a coupler 23 and a third low-pass filter 24 which are connected in sequence, wherein the input end of the first attenuator 9 is connected with one of the output ends of the multi-path power divider 8, the output end of the third low-pass filter 24 is connected with the intermediate frequency output interface, and the first mixer 10 and the second mixer 16 are respectively connected with the frequency source module. The first mixer 10 is connected to the frequency source module, receives a first local oscillation LO1 from the frequency source module, and performs primary frequency conversion with an input radio frequency signal, the second mixer 16 is also connected to the frequency source module, receives a second local oscillation LO2 from the frequency source, and performs secondary frequency conversion with the radio frequency signal after the primary frequency conversion, and the intermediate frequency signal after the secondary frequency conversion is filtered by the preselection switch filter bank 22 after being sequentially used by the fourth attenuator 17, the second low pass filter 18, the second amplifier 19, the second digital controlled attenuator 20, and the third amplifier 21, and is finally output by the coupler 23, the third low pass filter 24, and the intermediate frequency output interface.
The output end of the coupler 23 is also connected with a detector 25. The detector 25 detects the intermediate frequency signal coupled by the coupler 23.
The control power supply module comprises an FPGA chip, a FLASH memory, a crystal oscillator, a temperature detection module and a JTAG module, wherein the FPGA chip is respectively connected with the FLASH memory, the crystal oscillator temperature detection module and the JTAG module. The FPFA chip is used for controlling and debugging components in the radio frequency front-end module, the frequency source module and the frequency conversion module, the temperature detection module is used for constantly monitoring the temperature of a circuit in the multi-channel intermediate frequency preprocessing system and communicating with the FPGA chip, the crystal oscillator provides clock frequency for the FPGA chip, the FPGA chip is tested through the JTAG module, and the JTAG module can be a JTAG test chip and can also be pins on the FPGA chip. The FPGA chip carries out control signal communication through a control interface of the VPX interface board.
In this embodiment, the crystal oscillator is 100 MHz.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The multichannel intermediate frequency preprocessing system is characterized by comprising a control power supply module, a radio frequency front end module, a frequency source module and a plurality of frequency conversion modules, wherein the control power supply module is respectively connected with the radio frequency front end module, the frequency source module and the frequency conversion modules, the radio frequency front end module is respectively connected with the frequency conversion modules, and the frequency source module is respectively connected with the frequency conversion modules.
2. The multi-channel intermediate frequency preprocessing system of claim 1, further comprising a VPX interface board, wherein the VPX interface board is provided with a plurality of interfaces, and the control power module, the rf front-end module, the frequency source module and the plurality of frequency conversion modules are respectively connected to the VPX interface board.
3. The multi-channel IF preprocessing system of claim 2 wherein the plurality of interfaces includes RF input interfaces, reference signal input interfaces, clock signal output interfaces, and a plurality of IF output interfaces, the number of IF output interfaces being the same as the number of frequency conversion modules.
4. The multichannel intermediate frequency preprocessing system according to claim 3, wherein the radio frequency front end module includes a first band pass filter (1), a limiter (2), a first low noise amplifier (3), a first digitally controlled attenuator (4), a second low noise amplifier (5), a first low pass filter (6), an equalizer (7) and a multi-path power divider (8) connected in sequence, an input end of the first band pass filter (1) is connected to the radio frequency input interface, and a plurality of output ends of the multi-path power divider (8) are correspondingly connected to input ends of the plurality of frequency conversion modules.
5. A multi-channel IF pre-processing system as claimed in claim 4, wherein the frequency conversion module comprises a first attenuator (9), a first mixer (10), a second attenuator (11), a second bandpass filter (12), a first amplifier (13), a third bandpass filter (14), a third attenuator (15), a second mixer (16), a fourth attenuator (17), a second low pass filter (18), a second amplifier (19), a second digitally controlled attenuator (20), a third amplifier (21), a pre-selection switch filter bank (22), a coupler (23) and a third low pass filter (24) connected in sequence, wherein an input of the first attenuator (9) is connected to one of the outputs of the multi-path power divider (8), and an output of the third low pass filter (24) is connected to the IF output interface, the first mixer (10) and the second mixer (16) are respectively connected with the frequency source module.
6. A multichannel IF pre-processing system according to claim 5 characterised in that a detector (25) is further connected to the output of the coupler (23).
7. The multi-channel intermediate frequency preprocessing system of claim 1, wherein the control power module comprises an FPGA chip, a FLASH memory, a crystal oscillator, a temperature detection module and a JTAG module, and the FPGA chip is connected with the FLASH memory, the crystal oscillator temperature detection module and the JTAG module respectively.
8. A multichannel IF pre-processing system according to claim 7 characterised in that the crystal oscillator is 100 MHz.
9. A multichannel IF pre-processing system according to claim 4 characterised in that said number of frequency conversion modules is four and said multi-path power divider (8) is a four-path power divider.
10. The multi-channel if pre-processing system of claim 2, wherein the plurality of interfaces further comprises a control interface, and the control power module is connected to the control interface.
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| CN202120923083.7U CN215072329U (en) | 2021-04-29 | 2021-04-29 | Multichannel intermediate frequency pretreatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115459802A (en) * | 2022-08-24 | 2022-12-09 | 中国电子科技集团公司第十三研究所 | Millimeter wave frequency conversion multifunctional chip and chip testing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115459802A (en) * | 2022-08-24 | 2022-12-09 | 中国电子科技集团公司第十三研究所 | Millimeter wave frequency conversion multifunctional chip and chip testing method |
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Denomination of utility model: A multi-channel intermediate frequency preprocessing system Effective date of registration: 20220829 Granted publication date: 20211207 Pledgee: Bank of China Limited Chengdu Jinniu sub branch Pledgor: CHENGDU PHASE LOCK ELECTRONIC TECHNOLOGY Co.,Ltd. Registration number: Y2022510000256 |
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