CN118282479A - Satellite-borne link multiplexing multi-band radio frequency receiving measurement and control communication machine system and control method - Google Patents
Satellite-borne link multiplexing multi-band radio frequency receiving measurement and control communication machine system and control method Download PDFInfo
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Abstract
The invention provides a satellite-borne link multiplexing multi-frequency band radio frequency receiving measurement and control communication system and a control method, and relates to the technical field of satellite data transmission communication. The invention realizes the compatible receiving of a set of system multi-frequency bands and the link multiplexing of down-conversion of frequency band signals, and can greatly meet the miniaturization and portability design purposes of the satellite-borne equipment.
Description
Technical Field
The invention relates to the technical field of satellite data transmission communication, in particular to a satellite-borne link multiplexing multi-band radio frequency receiving measurement and control communication system.
Background
At present, frequency transmission signals of Ka frequency bands, X frequency bands and S frequency bands are mainly adopted by domestic and foreign low-orbit remote sensing satellites, in the prior art, single frequency band satellite-borne processing equipment is adopted for different frequency band integration, and therefore the design requirements of equipment miniaturization and portability are not met.
Disclosure of Invention
The invention provides the invention for further improving the miniaturization and portability of the satellite-borne link multiplexing multi-band radio frequency receiving measurement and control communication system, reducing the satellite quality and the receiving cost.
In order to achieve the above-mentioned objective, the first aspect of the present invention provides a satellite-borne link multiplexing multiband radio frequency receiving measurement and control communication system, which includes a radio frequency board and a digital board, where the digital board has a receiving processing unit, the radio frequency board includes a first frequency conversion selecting unit and a second frequency conversion selecting unit, the first frequency conversion selecting unit includes a first channel selecting unit and a first down-conversion unit, the second frequency conversion selecting unit includes a second channel selecting unit and a second down-conversion unit, the first frequency band signal received by the second frequency conversion selecting unit is down-converted into a second frequency band signal in the second down-conversion unit, then is input into the first frequency conversion selecting unit through the second channel selecting unit, and is input into the receiving processing unit through the first channel selecting unit after being down-converted into a third frequency band signal in the first frequency conversion unit, and the second frequency band signal received by the second frequency conversion selecting unit is input into the first frequency band selecting unit through the second channel selecting unit, and is further input into the receiving processing unit through the first frequency band selecting unit after being down-converted into the third frequency band signal in the first frequency conversion selecting unit.
In some embodiments, the first channel selection unit and the second channel selection unit each have an output, a first input, and a second input, wherein the first input is an end communicatively connected to the first down conversion unit or the second down conversion unit.
In some embodiments of the present invention, in some embodiments,
The third frequency band signal is an S frequency band signal of 2-2.4 Ghz;
the second frequency band signal is an X frequency band signal of 7-9 GHz;
the first frequency band signal is a Ka frequency band signal of 27-31 GHz.
In some embodiments, the first down-conversion unit includes:
The first high-pass filter is used for filtering the received second frequency band signal;
A first amplifier for amplifying the second frequency band signal filtered by the first high-pass filter;
a first low-pass filter for filtering the second frequency band signal amplified by the first amplifier;
The first mixer is used for down-converting the second frequency band signal into the third frequency band signal after mixing with the local oscillation signal;
the second low-pass filter is used for filtering the third frequency band signal formed by conversion;
the first numerical control attenuator is used for providing a dynamic range of 31db for the third frequency band signal after filtering;
the second amplifier is used for amplifying the third frequency band signal by 25 db;
a third amplifier, configured to amplify the third frequency band signal by 25db again;
and the band-pass filter is used for filtering the amplified third frequency band signal.
In some embodiments of the present invention, in some embodiments,
The second amplifier has a bypass function and the insertion loss during bypass is 1.4db.
In some embodiments of the present invention, in some embodiments,
The third amplifier has a bypass function and the insertion loss during bypass is 1.4db.
In some embodiments, the second down-conversion unit includes:
the second high-pass filter is used for filtering the received first frequency band signal;
A fourth amplifier, configured to amplify the filtered first frequency band signal;
a fifth amplifier for amplifying the first frequency band signal amplified via the fourth amplifier again;
the second mixer is used for down-converting the first frequency band signal into the second frequency band signal after mixing with the local oscillation signal;
a second digital attenuator for providing a dynamic range of 45db for the second frequency band signal deformed downward;
A sixth amplifier for amplifying the second frequency band signal;
And the third low-pass filter is used for filtering the second frequency band signal amplified by the sixth amplifier.
The second aspect of the present invention also provides a control method of the satellite-borne link multiplexing multiband radio frequency receiving measurement and control communication system, which includes:
When the system receives a third frequency band signal, the output end of the first channel selection unit is controlled to be conducted with the second input end of the first channel selection unit;
When the system receives a second frequency band signal, the output end of the first channel selection unit is controlled to be conducted with the first input end of the first channel selection unit, and the output end of the second channel selection unit is controlled to be conducted with the second input end of the second channel selection unit;
when the system receives the third frequency band signal, the output end of the first channel selection unit is controlled to be conducted with the first input end of the first channel selection unit, and the output end of the second channel selection unit is controlled to be conducted with the first input end of the second channel selection unit.
The invention has the advantages that:
The receiving processing unit of the digital board can receive the third frequency band signal from communication with the ground station or the satellite, the second frequency band signal and the first frequency band signal under the processing of the first frequency conversion selection unit and/or the second frequency conversion selection unit or the signal selection, so that the multi-frequency band compatible receiving of a set of communication machine system is realized, meanwhile, the link multiplexing of down-conversion of the frequency band signal can be realized through the control switching of the first channel selection unit and the second channel selection unit, the miniaturization and portability design purposes of the satellite-borne equipment can be met to a great extent, and the volume and the quality of the satellite-borne equipment are reduced. It is emphasized that, because of multiplexing the signal links in the invention, the system for realizing the invention can realize the receiving processing of a plurality of signals with different frequency bands by only adopting one set of digital board, and parts such as a power supply and a processor are not needed to be matched for each frequency band signal, so that the interactive control among different processors is avoided, the structure and control of the satellite-borne equipment are greatly simplified, and the volume and quality of the equipment are reduced.
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The above and other objects, features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are only some embodiments of the present application and other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic block diagram of a system of a satellite-borne link multiplexing multi-band radio frequency reception measurement and control communication system according to an embodiment of the invention;
fig. 2 schematically shows a block diagram of the first down-conversion unit of fig. 1 (with noise figure and link gain values);
Fig. 3 schematically shows a block diagram of the second down-conversion unit of fig. 1 (noise figure and link gain values);
Fig. 4 shows a waveform simulation diagram of a third frequency band signal (i.e. an S-band signal) formed by processing a first frequency band signal (i.e. a Ka-band signal) received by the satellite-borne link multiplexing multi-band radio frequency receiving measurement and control communication system according to the present invention by the second down-conversion unit and the first down-conversion unit.
The reference numerals are expressed as:
1. A radio frequency board; 11. a first frequency conversion selection unit; 111. a first channel selection unit; 112. a first down-conversion unit; 1121. a first high pass filter; 1122. a first amplifier; 1123. a first low pass filter; 1124. a first mixer; 1125. a second low pass filter; 1126. a first digitally controlled attenuator; 1127. a second amplifier; 1128. a third amplifier; 1129. a band-pass filter; 113. a second low frequency connector; 12. a second frequency conversion selection unit; 121. a second channel selection unit; 122. a second down-conversion unit; 1221. a second high pass filter; 1222. a fourth amplifier; 1223. a fifth amplifier; 1224. a second mixer; 1225. a second digital attenuator; 1226. a sixth amplifier; 1227. a third low pass filter; 2. a digital board; 21. a reception processing unit; 22. a first low frequency connector; 3. a radio frequency connecting wire; 4. and a low-frequency connecting wire.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the application may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.
The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one element from another element. Accordingly, a first component discussed below could be termed a second component without departing from the teachings of the present inventive concept. As used herein, the term "and/or" includes any one of the associated listed items and all combinations of one or more.
Those skilled in the art will appreciate that the drawings are schematic representations of example embodiments and that the modules or flows in the drawings are not necessarily required to practice the application and therefore should not be taken to limit the scope of the application.
According to an embodiment of the present invention, referring to fig. 1 to 4 in combination, the present invention provides a satellite-borne link multiplexing multiband radio frequency receiving measurement and control communication system, which includes a radio frequency board 1 and a digital board 2 (i.e., digital board FPGA, field programmable gate array), the digital board 2 has a receiving processing unit 21 therein, the radio frequency board 1 includes a first frequency conversion selecting unit 11 and a second frequency conversion selecting unit 12, the first frequency conversion selecting unit 11 includes a first channel selecting unit 111 and a first frequency conversion unit 112, the second frequency conversion selecting unit 12 includes a second channel selecting unit 121 and a second frequency conversion unit 122, a first frequency band signal received by the second frequency conversion selecting unit 12 is down-converted into a second frequency band signal in the second frequency conversion unit 122, then inputted into the first frequency conversion selecting unit 11 through the second channel selecting unit 121, and inputted into the receiving processing unit 21 through the first channel selecting unit 111 after being down-converted into a third frequency conversion signal in the first frequency conversion unit 112, the second frequency band signal received by the second frequency conversion selecting unit 12 also can be inputted into the receiving processing unit 21 through the first frequency conversion selecting unit 111 after being down-converted into the second frequency band signal through the first frequency conversion selecting unit 21. Referring specifically to fig. 1, the first low-frequency connector 22 in the digital board 2 is in communication connection with the second low-frequency connector 113 in the first frequency conversion selecting unit 11 through the low-frequency connection line 4, so as to realize transmission of power and control signals of the digital board 2 to the radio frequency board 1. Between each down-conversion unit and each channel selection unit, the receiving processing unit 21 and the first channel selection unit 111, and at the signal input end of each channel selection unit, all form a communication connection via the radio frequency connection line 3.
In this technical solution, the receiving processing unit 21 of the digital board 2 can receive the third frequency band signal from the ground station or the inter-satellite communication, the second frequency band signal and the first frequency band signal under the processing or signal selection of the first frequency conversion selecting unit 11 and/or the second frequency conversion selecting unit 12, so as to realize the multi-frequency band compatible receiving of a set of communication machine system, and meanwhile, the link multiplexing of the down-conversion of the frequency band signal can be realized through the control switching of the first channel selecting unit 111 and the second channel selecting unit 121, so that the design purposes of miniaturization and portability of the satellite-borne equipment can be met to a great extent, and the volume and quality of the satellite-borne equipment are reduced. It is emphasized that, because of multiplexing the signal links in the invention, the system for realizing the invention can realize the receiving processing of the signals with different frequency bands by only adopting one set of digital board 2, thereby greatly simplifying the structure of the satellite-borne equipment and reducing the volume and quality of the equipment.
It can be appreciated that the aforementioned digital board 2, upon receiving the corresponding signal, performs digital-to-analog conversion on the signal and demodulates the communication information.
In some embodiments, the first channel selection unit 111 and the second channel selection unit 121 each have an output, a first input, and a second input, where the first input is an end communicatively connected to the first down conversion unit 112 or the second down conversion unit 122. Specifically, the first channel selecting unit 111 and the second channel selecting unit 121 may be implemented by single pole double throw switches, respectively.
In some embodiments, the third frequency band signal is an S-band signal of 2-2.4 Ghz; the second frequency band signal is an X frequency band signal of 7-9 GHz; the first frequency band signal is a Ka frequency band signal of 27-31GHz, so that the frequency band bandwidths of the signals which can be received by the invention are 2GHz and 4GHz, namely the input signal frequency band bandwidth which can be processed by the invention is wider.
Referring specifically to fig. 2, in some embodiments, the first down-conversion unit 112 includes: a first high-pass filter 1121 for filtering the received second frequency band signal; a first amplifier 1122 for amplifying the second band signal filtered by the first high-pass filter 1121; a first low-pass filter 1123 for filtering the second frequency band signal amplified by the first amplifier 1122; the first mixer 1124 is configured to mix with a local oscillation signal and then down-convert the second frequency band signal into the third frequency band signal; a second low-pass filter 1125, configured to filter the third frequency band signal formed by conversion; a first digitally controlled attenuator 1126 for providing a dynamic range of 31db for the filtered third frequency band signal; a second amplifier 1127, configured to amplify the third frequency band signal by 25 db; a third amplifier 1128, configured to amplify the third frequency band signal by 25db again; a band-pass filter 1129, configured to filter the amplified third frequency band signal, where the second amplifier 1127 has a bypass function and a bypass insertion loss is 1.4db; the third amplifier 1128 has a bypass function and has a bypass-time insertion loss of 1.4db.
In the technical scheme, the first down-conversion unit 112 sequentially performs high-pass filtering, amplifying, low-pass filtering, mixing, low-pass filtering, numerical control attenuation, amplifying and band-pass filtering on the second frequency band signal input into the first frequency band signal, then down-converts the input X frequency band signal into the S frequency band signal, and inputs the S frequency band signal into the subsequent receiving and processing unit 21.
Referring further to FIG. 2, in one particular embodiment, the first high pass filter 1121 is model HFCN +, the first amplifier 1122 is model PMA-183PLN+, the first low pass filter 1123 is model LFCN-9170+, the first mixer 1124 is model LTC5549, the second low pass filter 1125 is model LFCG-4800+, the first digitally controlled attenuator 1126 is model HMC1119, the second amplifier 1127 is model QPL9096 with bypass capability for 25db amplification of the S band signal, and the bypass insertion loss is 1.4db; the model of the third amplifier 1128 is QPL9096, and the third amplifier has a bypass function, and is used for amplifying an S frequency band signal by 25db, and the insertion loss is 1.4db when in bypass; the band-pass filter 1129 is of the model BFCN-2275+, thereby meeting the design requirements of high gain, high dynamics and low spurious of the first downconverting unit 112.
Referring specifically to fig. 3, in some embodiments, the second down-conversion unit 122 includes: a second high-pass filter 1221, configured to filter the received first frequency band signal; a fourth amplifier 1222 for amplifying the filtered first frequency band signal; a fifth amplifier 1223 for re-amplifying the first frequency band signal amplified via the fourth amplifier 1222; a second mixer 1224, configured to mix with a local oscillation signal and then down-convert the first frequency band signal into the second frequency band signal; a second digital attenuator 1225 for providing a dynamic range of 45db for the second frequency band signal as down-converted; a sixth amplifier 1226, configured to amplify the second frequency band signal; a third low-pass filter 1227, configured to filter the second frequency band signal amplified by the sixth amplifier 1226.
In this technical solution, the second down-conversion unit 122 sequentially performs high-pass filtering, two-stage amplification, mixing, digital control attenuation, amplification, and low-pass filtering on the received first frequency band signal, and then converts the received Ka frequency band signal into an X frequency band signal for output, which has the effects of high gain, high dynamic and low spurious. It should be noted that, the gain and output power can be significantly improved by performing the two-stage amplification processing on the high-pass filtered first frequency band signal.
Referring specifically to FIG. 3, in one particular embodiment, the second high pass filter 1221 is model XHF2-153+, the fourth amplifier 1222 is model PMA3-34GLN+, the fifth amplifier 1223 is model PMA3-34GLN+, the second mixer 1224 is model HMC774ALC3B, the second digital attenuator 1225 is model HMC629A, the sixth amplifier 1226 is model PMA-183PLN+, and the third low pass filter 1227 is model LFCN-9170+, thereby meeting the high gain high dynamic low spurious design requirements of the first downconverting unit 112.
Specifically, due to the component design of each down-conversion unit, the maximum gain of the X-S frequency conversion link (i.e. the first down-conversion unit 112) is 41.45Db, the maximum gain of the ka-X frequency conversion link (i.e. the second down-conversion unit 122) is 60.45Db, and the total link maximum gain is 101.9Db, i.e. the high gain of the link is realized; the Ka-X frequency conversion link has a 45db dynamic range provided by a numerical control attenuator (namely the second numerical control attenuator 1225), the X-S frequency conversion link has a 31db dynamic range provided by a numerical control attenuator (namely the first numerical control attenuator 1126) and a dynamic range of each 26.4db provided by an amplifier with a bypass function (namely the second amplifier 1127 and the third amplifier 1128) which are 52.8db in total, and a dynamic range of 128.8db in total, namely the high dynamic of the system is realized; due to the adoption of the active mixer, the spurious caused by the overhigh driving power is reduced, and the filter is used for filtering after the input and output and amplification, so that the link spurious is reduced, and the low spurious design of the system is realized.
Referring to fig. 4, the waveform simulation diagram of the third frequency band signal (i.e., the S-band signal) formed by converting the first frequency band signal (i.e., the Ka-band signal) after being processed by the second down-conversion unit 122 and the first down-conversion unit 112 sequentially has phase noise smaller than-100 dbc/Hz at the bandwidth of 100 Hz-100 MHz offset, and good radio frequency index, which accords with the design expectations.
It can be understood that, referring to fig. 2 to 4, each component in each down-conversion unit is electrically connected according to the sequence before and after the signal processing.
The system operation and signal link selection of the present invention are further described in conjunction with fig. 1:
(1) When receiving the S-band signal, the digital board 2 controls the output end of the first channel selection unit 111 to be conducted with the second input section thereof, and the S-band signal received by the RFin-S connector enters the receiving processing unit 21 for processing;
(2) When receiving the X-band signal, the X-band signal enters the second input end of the second channel selection unit 121 through a port (i.e., an RFin-X connector), the digital board 2 controls the second input end of the second channel selection unit 121 to be conducted with the output end thereof, after passing through the first down-conversion unit 112, the X-band signal is converted into an S-band signal, and the digital board 2 controls the first input end of the first channel selection unit 111 to be conducted with the output end thereof and then enters the receiving processing unit 21 for processing;
(3) When receiving the Ka band signal, the Ka band signal enters the second down-conversion unit 122 through a port (i.e. an RFin-Ka connector), is converted into an X band signal after being processed, and then enters the first input end of the second channel selection unit 121, and the digital board 2 controls the first input end of the second channel selection unit 121 to be conducted with the output end thereof; the X-band signal enters the first down-conversion unit 112 and is converted into an S-band signal after being processed, and enters the first input end of the first channel selection unit 111, the digital board 2 controls the first input end of the first channel selection unit 111 to be conducted with the output end thereof, and the S-band signal obtained by being processed by the first down-conversion unit 112 enters the receiving processing unit 21 of the digital board 2 for processing.
Namely, according to an embodiment of the present invention, there is also provided a control method of the above-mentioned satellite-borne link multiplexing multiband radio frequency receiving measurement and control communication system, including:
When the system receives the third frequency band signal, the output end of the first channel selection unit 111 is controlled to be conducted with the second input end of the first channel selection unit;
When the system receives the second frequency band signal, the output end of the first channel selection unit 111 is controlled to be conducted with the first input end of the first channel selection unit, and the output end of the second channel selection unit 121 is controlled to be conducted with the second input end of the second channel selection unit;
when the system receives the third frequency band signal, the output terminal of the first channel selection unit 111 is controlled to be conducted with the first input terminal thereof, and the output terminal of the second channel selection unit 121 is controlled to be conducted with the first input terminal thereof.
In particular, in the present system, the local oscillation signal of the first down-conversion unit 112 is provided by the pll chip LMX2594 of the TI company, and the local oscillation signal of the second down-conversion unit 122 is provided by the pll chip LMX2594 of the TI company after frequency multiplication, which is not the important content of the present invention and will not be described herein.
In conclusion, the equipment and the system can process Ka, X and S multi-band signals, and can effectively reduce the volume and the quality of the equipment and the complexity of the whole system when the equipment and the system are used as satellite-borne products.
From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software in combination with hardware.
The exemplary embodiments of the present invention have been particularly shown and described above. It is to be understood that this invention is not limited to the precise arrangements, instrumentalities and instrumentalities described herein; on the contrary, the invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (8)
1. The satellite-borne link multiplexing multi-band radio frequency receiving measurement and control communication machine system comprises a radio frequency board (1) and a digital board (2), and is characterized in that the digital board (2) is internally provided with a receiving processing unit (21), the radio frequency board (1) comprises a first frequency conversion selecting unit (11) and a second frequency conversion selecting unit (12), the first frequency conversion selecting unit (11) comprises a first channel selecting unit (111) and a first down-conversion unit (112), the second frequency conversion selecting unit (12) comprises a second channel selecting unit (121) and a second down-conversion unit (122), a first frequency band signal received by the second frequency conversion selecting unit (12) is input into the first frequency conversion selecting unit (11) through the second channel selecting unit (121) after being down-converted into a second frequency band signal in the second frequency conversion unit (122), and is input into the receiving processing unit (21) through the first channel selecting unit (111) after being down-converted into a third frequency conversion signal in the first frequency conversion unit (112), the second frequency conversion selecting unit (12) receives a second frequency band signal through the second frequency conversion selecting unit (121), and after being down-converted into a third frequency conversion signal in the first down-conversion unit (112), the third frequency band signal received by the first frequency conversion selection unit (11) is input into the receiving processing unit (21) through the first channel selection unit (111), and the third frequency band signal received by the first frequency conversion selection unit (11) can also be input into the receiving processing unit (21) through the first channel selection unit (111).
2. The satellite-borne link multiplexing multi-band radio frequency receiving measurement and control communication system according to claim 1, wherein the first channel selection unit (111) and the second channel selection unit (121) each have an output end, a first input end and a second input end, wherein the first input end is an end communicatively connected to the first down-conversion unit (112) or the second down-conversion unit (122).
3. The satellite-borne link multiplexing multi-band radio frequency receiving measurement and control communication system according to claim 2, wherein,
The third frequency band signal is an S frequency band signal of 2-2.4 Ghz;
the second frequency band signal is an X frequency band signal of 7-9 GHz;
the first frequency band signal is a Ka frequency band signal of 27-31 GHz.
4. A satellite-borne link multiplexing multi-band radio frequency reception measurement and control communicator system according to claim 3 and wherein said first down-conversion unit (112) comprises:
-a first high pass filter (1121) for filtering said received second frequency band signal;
A first amplifier (1122) for amplifying the second band signal filtered by the first high-pass filter (1121);
a first low-pass filter (1123) for filtering the second frequency band signal amplified by the first amplifier (1122);
A first mixer (1124) for down-converting the second band signal to the third band signal after mixing with a local oscillator signal;
-a second low pass filter (1125) for filtering said third frequency band signal formed by conversion;
A first digitally controlled attenuator (1126) for providing a dynamic range of 31db for the filtered third frequency band signal;
a second amplifier (1127) for amplifying the third frequency band signal by 25 db;
A third amplifier (1128) for amplifying the third frequency band signal by 25db again;
-a band pass filter (1129) for filtering the amplified third frequency band signal.
5. The satellite-borne link multiplexing multi-band radio frequency receiving measurement and control communication system according to claim 4, wherein,
The second amplifier (1127) has a bypass function and has a bypass-time insertion loss of 1.4db.
6. The satellite-borne link multiplexing multi-band radio frequency receiving measurement and control communication system according to claim 5, wherein,
The third amplifier (1128) has a bypass function and has a bypass-time insertion loss of 1.4db.
7. The satellite-borne link multiplexing multi-band radio frequency reception measurement and control communicator system according to any one of claims 1 to 6, wherein said second down-conversion unit (122) comprises:
-a second high pass filter (1221) for filtering said received first frequency band signal;
a fourth amplifier (1222) for amplifying the filtered first frequency band signal;
-a fifth amplifier (1223) for re-amplifying the first frequency band signal amplified via the fourth amplifier (1222);
A second mixer (1224) for down-converting the first frequency band signal to the second frequency band signal after mixing with a local oscillator signal;
a second digital attenuator (1225) for providing a dynamic range of 45db for said second frequency band signal as down-converted;
-a sixth amplifier (1226) for amplifying said second frequency band signal;
And a third low-pass filter (1227) for filtering the second frequency band signal amplified by the sixth amplifier (1226).
8. A control method of a satellite-borne link multiplexing multiband radio frequency reception measurement and control communication system according to any one of claims 1 to 7, comprising:
when the system receives a third frequency band signal, the output end of the first channel selection unit (111) is controlled to be conducted with the second input end of the first channel selection unit;
When the system receives a second frequency band signal, the output end of the first channel selection unit (111) is controlled to be conducted with the first input end of the first channel selection unit, and the output end of the second channel selection unit (121) is controlled to be conducted with the second input end of the second channel selection unit;
When the system receives the third frequency band signal, the output end of the first channel selection unit (111) is controlled to be conducted with the first input end of the first channel selection unit, and the output end of the second channel selection unit (121) is controlled to be conducted with the first input end of the second channel selection unit.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026929A (en) * | 2016-05-11 | 2016-10-12 | 中国科学院遥感与数字地球研究所 | Down-conversion device and method for broadband Ka band |
| CN108667468A (en) * | 2018-05-16 | 2018-10-16 | 广州海格通信集团股份有限公司 | Radio-frequency front-end reception device |
| CN211014456U (en) * | 2019-05-21 | 2020-07-14 | 一诺仪器（中国）有限公司 | Frequency conversion system and spectrum analyzer |
-
2024
- 2024-03-29 CN CN202410380037.5A patent/CN118282479A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026929A (en) * | 2016-05-11 | 2016-10-12 | 中国科学院遥感与数字地球研究所 | Down-conversion device and method for broadband Ka band |
| CN108667468A (en) * | 2018-05-16 | 2018-10-16 | 广州海格通信集团股份有限公司 | Radio-frequency front-end reception device |
| CN211014456U (en) * | 2019-05-21 | 2020-07-14 | 一诺仪器（中国）有限公司 | Frequency conversion system and spectrum analyzer |
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