CN115296686A - Microwave four-channel frequency conversion method and system based on radar reconnaissance system - Google Patents
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Abstract
The invention discloses a microwave four-channel frequency conversion method and a microwave four-channel frequency conversion system based on a radar reconnaissance system, and relates to the technical field of radar signal processing; the microwave four-channel frequency conversion method comprises the following steps: receiving and processing one path of omnidirectional input radio frequency signal, processing and outputting two paths of signals through a power divider, and outputting to obtain one path of radio frequency signal and one path of intermediate frequency signal; the invention is provided with an omnidirectional channel and three directional channels, wherein the omnidirectional channel can output a radio frequency signal and can output four intermediate frequency signals together with the three directional channels; signals are selectively output according to needs, so that power resources can be saved, and the service life of the radar detection system can be prolonged; the method and the device have the advantages that one path of radio frequency signal is output, the waveform change of the original radio frequency signal can be observed under the action of the radio frequency signal, meanwhile, the original radio frequency signal and the variable frequency signal can be compared and monitored, whether the variable frequency signal is correct or not is verified, and the one path of radio frequency signal plays a role in real-time monitoring.
Description
Technical Field
The invention relates to the technical field of radar signal processing, in particular to a microwave four-channel frequency conversion method and system based on a radar reconnaissance system.
Background
The radar detection system is a system which receives radiation signals of an enemy radar through a radar detection machine and acquires the position and parameters of the enemy radar in the space according to the radiation signals of the radar; the single pulse radar can obtain all information of the target position in one echo pulse; at present, four-channel microwave detection devices are mostly used to improve the multi-interference resistance, signals of the four-channel microwave detection devices are transmitted out through antennas after being subjected to frequency conversion and amplification, and the four-channel microwave detection devices can realize the functions of receiving, transmitting, switching and the like;
however, the traditional four-channel microwave detection device can only output intermediate frequency signals and can only work in the same frequency band of four channels, so that the capacity of the microwave channels is greatly limited, and meanwhile, the output signals cannot be effectively detected and compared, and radiation signals of enemy radars cannot be effectively received and verified; meanwhile, in the traditional four-channel system, each channel is installed in the radar detection system by using one module, so that the occupied volume in the radar detection system is overlarge, the problems of structural complexity and excessive hardware waste in the radar detection system are caused, and the production cost is increased in the aspect of manufacturing the four-channel modules; therefore, an improvement in the above problems is required.
Disclosure of Invention
The invention aims to provide a microwave four-channel frequency conversion method and system based on a radar reconnaissance system, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: a microwave four-channel frequency conversion method based on a radar reconnaissance system comprises the following steps:
receiving and processing one path of omnidirectional input radio frequency signals, processing and outputting two paths of signals through a power divider, and outputting to obtain one path of radio frequency signals and one path of intermediate frequency signals;
and receiving and processing the three directional input radio frequency signals, and processing and outputting three intermediate frequency signals.
Further, the partial steps of receiving and processing one path of omnidirectional input radio frequency signals and receiving and processing three paths of directional input radio frequency signals specifically include:
receiving a radio frequency signal, processing the radio frequency signal through a filter, an amplitude limiter and a low noise amplifier, and performing frequency conversion processing on the radio frequency signal through a first fixed local oscillator signal after processing so that the radio frequency signal is in a set frequency range.
Further, the intermediate frequency signals include four intermediate frequency signals, wherein any one of the intermediate frequency signals is obtained by frequency conversion according to the following method:
and the variable local oscillator signal is used for converting the signal in any 1GHz bandwidth in the first frequency band into a high intermediate frequency signal, the second fixed local oscillator signal is used for converting the high intermediate frequency signal into a low intermediate frequency signal, and the intermediate frequency signal is filtered and processed by a band-pass filter and output.
Further, receiving one path of omnidirectional input radio frequency signals and three paths of directional input radio frequency signals; the frequency bands of the one path of omnidirectional input radio frequency signal are respectively 0.38-2 GHz and 2-18 GHz, the frequency bands of the three paths of directional input radio frequency signals are respectively 0.38-2 GHz, 2-6 GHz and 6-18 GHz, and the first fixed local oscillation signal is 8.38GHz; and carrying out frequency conversion processing on one path of omnidirectional input radio frequency signal and three paths of directional input radio frequency signals with the frequency range of 0.38-2 GHz, wherein the frequency range of the frequency-converted signals is 6.38-8 GHz.
The variable local oscillator signal is 24-40 GHz, the frequency range of the first frequency band is 2-18 GHz, the frequency range of the high and medium frequency signals is 21-22 GHz, the frequency range of the second fixed local oscillator signal is 19.7GHz, and the frequency range of the low and medium frequency signals is 1.3-2.3 GHz;
the four paths of intermediate frequency signals are obtained by selecting four variable bandwidths and amplifying the four variable bandwidths by a low noise amplifier, wherein the four variable bandwidths are 0.02GHz, 0.05GHz, 0.2GHz and 1GHz, and the four variable bandwidths take 1.8GHz as the center.
The frequency conversion system comprises an omnidirectional module, a directional module and a frequency synthesizer module;
the omnidirectional module receives and processes one path of omnidirectional input radio frequency signals, processes and outputs two paths of signals through the power divider, and outputs one path of radio frequency signals and one path of intermediate frequency signals; the omnidirectional input radio frequency signal is transmitted in an omnidirectional channel;
the directional module receives and processes the three directional input radio frequency signals, processes the radio frequency signals and outputs three intermediate frequency signals; the three directional input radio frequency signals are respectively transmitted in three directional channels;
the frequency synthesis module provides three local oscillator signals required by frequency conversion for the omnidirectional module and the directional module;
the frequency synthesizer module is respectively connected with the omnidirectional module and the directional module.
The frequency synthesizer module comprises a first fixed local oscillator, a second fixed local oscillator, a first variable local oscillator, a second variable local oscillator, a third variable local oscillator and a fourth variable local oscillator;
the first fixed local oscillator is used for carrying out frequency conversion processing on the radio frequency signal through local oscillator frequency;
the second fixed local oscillator is used for converting the high and medium frequency signals into low and medium frequency signals through local oscillator frequency;
the first variable local oscillator is used for accessing one branch of the one-to-four power divider to the omnidirectional module, and the remaining three branches are accessed to three channels of the directional module, so as to calibrate the omnidirectional module and the directional module;
the second variable local oscillator has the same local oscillator frequency band as the third variable local oscillator and the fourth variable local oscillator; the second variable local oscillator is divided into two branches by a one-to-two power divider, one branch is connected with the omnidirectional module, and the other branch is connected with the three channels of the directional module respectively with the signals of the third variable local oscillator and the fourth variable local oscillator so as to convert the frequency of the radio-frequency signal into a high-intermediate frequency signal.
The second variable local oscillator, the third variable local oscillator and the fourth variable local oscillator can perform synchronous independent control and same control on signals.
The omnidirectional module and the directional module both comprise a radio frequency front end component and a microwave frequency conversion component.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention is provided with an omnidirectional channel and three directional channels, wherein the omnidirectional channel can output a radio frequency signal and can output four intermediate frequency signals together with the three directional channels; the signals are selectively output according to the requirements, so that the power resource can be saved, the service life of the radar detection system can be prolonged, one path of radio frequency signals is output, the waveform change of the original radio frequency signals can be observed under the action of the radio frequency signals, and meanwhile, the original radio frequency signals and the variable frequency signals can be compared and monitored, so that whether the variable frequency signals are correct or not is verified, and one path of radio frequency signals plays a role in real-time monitoring;
2. the three directional channels of the directional module can be independently controlled and simultaneously work in three different frequency bands of 0.38-2 GHz, 2-6 GHz and 6-18 GHz, and the three channels can also simultaneously work in the same frequency band according to requirements, so that the aim of flexible use is fulfilled;
3. the output bandwidth of the invention is selected by taking 1.8GHz as the center and four variable bandwidths of 0.02GHz, 0.05GHz, 0.2GHz and 1GHz, and can meet the receiving of various frequency signals, thereby improving the signal receiving capability of the radar detection system and timely and effectively verifying the radiation signals of enemy radars;
4. the local oscillation signals can carry out synchronous independent control and same control on the signals, and further can carry out effective receiving or frequency conversion processing on the signals in the four channels;
5. in the invention, a plurality of frequency conversion channels share one module, thereby solving the problems of structural complexity and hardware resource waste caused by the need of simultaneously configuring more than four single frequency conversion channels, reducing the occupied volume in a radar detection system and reducing the production cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a microwave four-channel microwave unit according to the present invention;
FIG. 2 is a schematic diagram of the microwave four-channel module connection of the present invention;
figure 3 is a schematic diagram of the rf front-end component design of the single-channel omni-directional module of the present invention;
FIG. 4 is a schematic diagram of the microwave frequency conversion assembly design of the single channel omni-directional module of the present invention;
FIG. 5 is a schematic diagram of the RF front end assembly design of the three-channel directional module of the present invention;
fig. 6 is a schematic diagram of the microwave frequency conversion assembly design of the single channel directional module of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution:
a microwave four-channel frequency conversion method based on a radar reconnaissance system comprises the following steps:
receiving and processing one path of omnidirectional input radio frequency signals, processing and outputting two paths of signals through a power divider, and outputting to obtain one path of radio frequency signals and one path of intermediate frequency signals;
receiving and processing three directional input radio frequency signals, and processing and outputting three intermediate frequency signals;
the function of the output radio frequency signal in the whole system is as follows:
1. the waveform of the original radio frequency signal can be identified;
2. the intermediate frequency signal after frequency conversion processing can be compared with the original intermediate frequency signal, so that whether the intermediate frequency signal after frequency conversion processing is correct or not is verified, and if the intermediate frequency signal after frequency conversion processing is not changed and fluctuated through comparison, the intermediate frequency signal after frequency conversion is correct; otherwise, the intermediate frequency signal after frequency conversion is indicated to be wrong.
Further, the partial steps of receiving and processing one path of omnidirectional input radio frequency signals and receiving and processing three paths of directional input radio frequency signals specifically include:
receiving a radio frequency signal, processing the radio frequency signal through a filter, an amplitude limiter and a low noise amplifier, and performing frequency conversion processing on the radio frequency signal through a first fixed local oscillator signal after processing so that the radio frequency signal is in a set frequency range.
Further, the intermediate frequency signals include four intermediate frequency signals, wherein any one of the intermediate frequency signals is obtained by frequency conversion according to the following method:
the method comprises the steps that signals in any 1GHz bandwidth in a first frequency band are converted into high-intermediate frequency signals through variable local oscillation signals, the high-intermediate frequency signals are converted into low-intermediate frequency signals through second fixed local oscillation signals, and the high-intermediate frequency signals are filtered through a band-pass filter and output intermediate frequency signals;
in the invention, a high intermediate frequency signal is converted into a low intermediate frequency signal, and the low intermediate frequency signal is processed by a filter to output an intermediate frequency signal, in fig. 3, a mixer and a filter are used, and the high intermediate frequency signal and a local oscillator signal are mixed by the mixer to further output the low intermediate frequency signal; if the high-intermediate-frequency signal is directly selected to output the intermediate-frequency signal, harmonic waves and spurious signals are large, and the signal-to-noise ratio and spurious suppression cannot be guaranteed; therefore, the high and medium frequency signals are firstly converted into the low and medium frequency signals through the second fixed local oscillator signals, all signal processing is carried out under the low and medium frequency signals, the cost of signal processing under the low frequency is reduced, and the high and medium frequency signals are converted into the low and medium frequency signals through the second fixed local oscillator signals, so that the medium frequency signals can be easily filtered.
Further, receiving one path of omnidirectional input radio frequency signals and three paths of directional input radio frequency signals; the frequency bands of the one path of omnidirectional input radio frequency signals are respectively 0.38-2 GHz and 2-18 GHz, the frequency bands of the three paths of directional input radio frequency signals are divided into 0.38-2 GHz, 2-6 GHz and 6-18 GHz, and the first fixed local oscillation signal is 8.38GHz; carrying out frequency conversion processing on one path of omnidirectional input radio frequency signals and three paths of directional input radio frequency signals with the frequency range of 0.38-2 GHz, wherein the frequency band of the frequency-converted signals is 6.38-8 GHz;
in the invention, the frequency bands for receiving three paths of radio frequency signals or four paths of radio frequency signals are respectively 0.38-2 GHz, 2-6 GHz and 6-18 GHz, and the second, third and fourth variable local oscillators of the frequency synthesis module can be independently controlled, so that the three paths of radio frequency signals in the three paths of channels of the orientation module can realize the receiving and frequency conversion of independent 1GHz instantaneous bandwidth signals in the three frequency bands of 0.38-2 GHz, 2-6 GHz and 6-18 GHz respectively; the second, third and fourth variable local oscillators of the frequency synthesis module can also be controlled in the same way, and one channel of the omnidirectional module and three channels of the directional module receive and convert independent 1GHz instantaneous bandwidth signals in the ranges of three frequency bands of 0.38-2 GHz, 2-6 GHz and 6-18 GHz; the information is transmitted through a channel;
according to the relation of the frequency bands, the following are obtained: the difference between 2GHz to 6GHz and 6GHz to 18GHz is three times, and the advantage of selecting three times in the frequency band is that the harmonic stray is small; if the frequency band is three times different, the original 0.666-2 GHz frequency band of 0.38-2 GHz is 0.666-2 GHz, so that the frequency of the 0.38-2 GHz frequency band is converted to 6.38-8 GHz, and the three-time difference of the frequency bands is also satisfied;
further, the variable local oscillation signal is 24 to 40GHz, the frequency range of the first frequency band is 2 to 18GHz, the frequency range of the high and medium frequency signals is 21 to 22GHz, the frequency range of the second fixed local oscillation signal is 19.7GHz, and the frequency range of the low and medium frequency signals is 1.3 to 2.3GHz;
in the invention, the frequency band of the low-intermediate frequency signal is obtained by subtracting the frequency band of the high-intermediate frequency signal from the frequency of the second fixed local oscillator signal; the high and medium frequency band range is the difference between the variable local oscillator signal 24-40 GHz and the frequency band range of the first frequency band; for example: selecting a 1GHz instantaneous bandwidth of 17-18 GHz according to the sampling value in the frequency range of 2-18 GHz, and selecting 39GHz by using a variable local oscillator signal; namely 39GHz-17GHz =22GHz,39GHz-18GHz =21GHz can be obtained, so that the range of the high and medium frequency bands is 21-22 GHz;
the four paths of intermediate frequency signals are obtained by selecting four variable bandwidths and amplifying the four variable bandwidths by a low noise amplifier, wherein the four variable bandwidths are 0.02GHz, 0.05GHz, 0.2GHz and 1GHz, and the four variable bandwidths take 1.8GHz as a center;
wherein 0.02GHz, 0.05GHz, 0.2GHz and 1GHz are obtained by the process of FIG. 4; for example: 0.02GHz =1.81GHz-1.79GHz,0.05GHz =1.825GHz-1.775GHz;0.2GHz =1.9GHz-1.7GHz;1GHz =2.3GHz-1.3GHz;
the frequency conversion system comprises an omnidirectional module, a directional module and a frequency synthesizer module;
the omnidirectional module receives and processes one path of omnidirectional input radio frequency signals, processes and outputs two paths of signals through the power divider, and outputs one path of radio frequency signals and one path of intermediate frequency signals; the omnidirectional input radio frequency signal is transmitted in an omnidirectional channel
The directional module receives and processes the three directional input radio frequency signals, processes the radio frequency signals and outputs three intermediate frequency signals; the three directional input radio frequency signals are respectively transmitted in three directional channels;
the frequency synthesis module provides three local oscillator signals required by frequency conversion for the omnidirectional module and the directional module;
the frequency synthesis module is respectively connected with the omnidirectional module and the directional module.
The frequency synthesis module comprises a first fixed local oscillator, a second fixed local oscillator, a first variable local oscillator, a second variable local oscillator, a third variable local oscillator and a fourth variable local oscillator;
the first fixed local oscillator is used for carrying out frequency conversion processing on the radio frequency signal through local oscillator frequency;
the second fixed local oscillator is used for converting the high and medium frequency signals into low and medium frequency signals through local oscillator frequency;
the first variable local oscillator is used for accessing one branch of the one-to-four power divider to the omnidirectional module, and the remaining three branches are accessed to three channels of the directional module, so as to calibrate the omnidirectional module and the directional module;
the second variable local oscillator has the same local oscillator frequency band as the third variable local oscillator and the fourth variable local oscillator; the second variable local oscillator is divided into two branches by a one-to-two power divider, one branch is connected with the omnidirectional module, and the other branch is connected with the third variable local oscillator and the fourth variable local oscillator respectively to three channels of the directional module so as to convert the radio frequency signal into a high-intermediate frequency signal;
as shown in fig. 2, the frequency band of the first variable local oscillator is 0.38GHz to 18GHz, and the frequency bands of the second variable local oscillator, the third variable local oscillator, and the fourth variable local oscillator are all 24 GHz to 40GHz;
the second variable local oscillator, the third variable local oscillator and the fourth variable local oscillator can perform synchronous independent control and same control on signals; as shown in fig. 2, by controlling the switch matrix of the radio frequency front end component of the directional module, three channels in the directional module in the four microwave channels can simultaneously receive and convert signals with independent 1GHz instantaneous bandwidth in three frequency ranges of 0.38-2 GHz, 2-6 GHz, and 6-18 GHz; the second, third and fourth variable local oscillators of the frequency synthesis module can also be controlled in the same way, and one channel in the omnidirectional module and three channels of the directional module in the four microwave channels can synchronously receive and convert the four channels of signals with independent 1GHz instantaneous bandwidth in a certain frequency band in the ranges of 0.38-2 GHz, 2-6 GHz and 6-18 GHz through the switch matrix of the radio frequency front end component of the directional module;
the omnidirectional module and the directional module both comprise a radio frequency front end component and a microwave frequency conversion component; the radio frequency front end component is used for carrying out amplitude limiting, filtering and amplifying on signals through an amplitude limiter, a filter and a low noise amplifier; the amplitude limiter is used for limiting the amplitude of the output signal within a certain range to obtain good amplitude limiting characteristics; the functions of the rf front-end module and the microwave frequency conversion module in the omnidirectional module and the directional module are shown in fig. 3, fig. 4, fig. 5, and fig. 6, respectively.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. 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 (9)
1. A microwave four-channel frequency conversion method based on a radar reconnaissance system is characterized in that: the microwave four-channel frequency conversion method comprises the following steps:
receiving and processing one path of omnidirectional input radio frequency signal, processing and outputting two paths of signals through a power divider, and outputting to obtain one path of radio frequency signal and one path of intermediate frequency signal;
and receiving and processing the three directional input radio frequency signals, and processing and outputting three intermediate frequency signals.
2. The microwave four-channel frequency conversion method based on the radar reconnaissance system as claimed in claim 1, wherein: the partial steps of receiving and processing one path of omnidirectional input radio frequency signals and receiving and processing three paths of directional input radio frequency signals specifically include:
receiving a radio frequency signal, processing the radio frequency signal through a filter, an amplitude limiter and a low noise amplifier, and performing frequency conversion processing on the radio frequency signal through a first fixed local oscillator signal after processing so that the radio frequency signal is in a set frequency range.
3. The microwave four-channel frequency conversion method based on the radar reconnaissance system according to claim 1, characterized in that: the intermediate frequency signals comprise four paths of intermediate frequency signals, wherein any one of the intermediate frequency signals is obtained by frequency conversion according to the following method:
and the variable local oscillator signal is used for converting the signal in any 1GHz bandwidth in the first frequency band into a high intermediate frequency signal, the second fixed local oscillator signal is used for converting the high intermediate frequency signal into a low intermediate frequency signal, and the intermediate frequency signal is filtered and processed by a band-pass filter and is output.
4. The microwave four-channel frequency conversion method based on the radar reconnaissance system as claimed in claim 2, wherein: receiving one path of omnidirectional input radio frequency signals and three paths of directional input radio frequency signals; the frequency bands of the one path of omnidirectional input radio frequency signals are respectively 0.38-2 GHz and 2-18 GHz, the frequency bands of the three paths of directional input radio frequency signals are divided into 0.38-2 GHz, 2-6 GHz and 6-18 GHz, and the first fixed local oscillation signal is 8.38GHz; and carrying out frequency conversion processing on one path of omnidirectional input radio frequency signals and three paths of directional input radio frequency signals with the frequency range of 0.38-2 GHz, wherein the frequency band of the frequency-converted signals is 6.38-8 GHz.
5. The microwave four-channel frequency conversion method based on the radar reconnaissance system according to claim 3, characterized in that: the variable local oscillation signal is 24-40 GHz, the frequency range of the first frequency band is 2-18 GHz, the frequency range of the high and medium frequency signals is 21-22 GHz, the frequency range of the second fixed local oscillation signal is 19.7GHz, and the frequency range of the low and medium frequency signals is 1.3-2.3 GHz;
the four paths of intermediate frequency signals are obtained by selecting four variable bandwidths and amplifying the four variable bandwidths by a low noise amplifier, wherein the four variable bandwidths are 0.02GHz, 0.05GHz, 0.2GHz and 1GHz, and the four variable bandwidths take 1.8GHz as a center.
6. A microwave four-channel frequency conversion system based on a radar reconnaissance system, which applies the method of claim 1 and is characterized in that: the frequency conversion system comprises an omnidirectional module, a directional module and a frequency synthesizer module;
the omnidirectional module receives and processes one path of omnidirectional input radio frequency signal, processes and outputs two paths of signals through the power divider, and outputs one path of radio frequency signal and one path of intermediate frequency signal; the omnidirectional input radio frequency signal is transmitted in an omnidirectional channel;
the directional module receives and processes the three directional input radio frequency signals, processes the radio frequency signals and outputs three intermediate frequency signals; the three directional input radio frequency signals are respectively transmitted in three directional channels;
the frequency synthesis module provides three local oscillator signals required by frequency conversion for the omnidirectional module and the directional module;
the frequency synthesizer module is respectively connected with the omnidirectional module and the directional module.
7. The microwave four-channel frequency conversion system based on the radar reconnaissance system according to claim 6, wherein: the frequency synthesis module comprises a first fixed local oscillator, a second fixed local oscillator, a first variable local oscillator, a second variable local oscillator, a third variable local oscillator and a fourth variable local oscillator;
the first fixed local oscillator is used for carrying out frequency conversion processing on the radio frequency signal through local oscillator frequency;
the second fixed local oscillator is used for converting the high and medium frequency signals into low and medium frequency signals through local oscillator frequency;
the first variable local oscillator is used for connecting one branch of the one-to-four power divider to the omnidirectional module, and the remaining three branches are connected to three channels of the directional module, so as to calibrate the omnidirectional module and the directional module;
the second variable local oscillator is the same as the local oscillator frequency band of the third variable local oscillator and the fourth variable local oscillator; the second variable local oscillator is divided into two branches by a one-to-two power divider, one branch is connected with the omnidirectional module, and the other branch is connected with the three channels of the directional module respectively with the signals of the third variable local oscillator and the fourth variable local oscillator so as to convert the frequency of the radio-frequency signal into a high-intermediate frequency signal.
8. The microwave four-channel frequency conversion system based on the radar reconnaissance system according to claim 7, wherein: the second variable local oscillator, the third variable local oscillator and the fourth variable local oscillator can perform synchronous independent control and same control on signals.
9. The microwave four-channel frequency conversion system based on the radar reconnaissance system according to claim 6, wherein: the omnidirectional module and the directional module both comprise a radio frequency front end component and a microwave frequency conversion component.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204031164U (en) * | 2014-07-18 | 2014-12-17 | 南京誉葆科技有限公司 | Millimeter wave transceiving assembly |
| CN213484821U (en) * | 2020-10-19 | 2021-06-18 | 扬州健行电子科技有限公司 | Frequency conversion assembly for electronic warfare and surveillance equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204031164U (en) * | 2014-07-18 | 2014-12-17 | 南京誉葆科技有限公司 | Millimeter wave transceiving assembly |
| CN213484821U (en) * | 2020-10-19 | 2021-06-18 | 扬州健行电子科技有限公司 | Frequency conversion assembly for electronic warfare and surveillance equipment |
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