CN114280557B - Method for realizing simultaneous receiving and transmitting of airborne electronic equipment based on frequency transformation - Google Patents
Method for realizing simultaneous receiving and transmitting of airborne electronic equipment based on frequency transformation Download PDFInfo
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- CN114280557B CN114280557B CN202111604667.9A CN202111604667A CN114280557B CN 114280557 B CN114280557 B CN 114280557B CN 202111604667 A CN202111604667 A CN 202111604667A CN 114280557 B CN114280557 B CN 114280557B
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- 230000009466 transformation Effects 0.000 title claims description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 62
- 229910052701 rubidium Inorganic materials 0.000 claims abstract description 10
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000010355 oscillation Effects 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 2
- 238000002955 isolation Methods 0.000 abstract description 9
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 6
- 230000001427 coherent effect Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
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- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention discloses a method for realizing the receiving and transmitting of an airborne electronic device based on frequency conversion, which utilizes a ground transponder and an airborne transponder to form a double-station synchronous system to carry out frequency conversion twice, so that the receiving and transmitting frequencies on the same transponder are different, and the receiving and transmitting isolation is realized, thereby realizing the receiving and transmitting simultaneous technology. The ground transponder receives AGHz radio frequency signals transmitted by the radar, changes the signals into intermediate frequency through the receiving down-conversion assembly, generates interference signals through the digital assembly, then sends the interference signals into the up-conversion assembly, converts the interference signals into radio frequency interference signals of BGHz, sends the interference signals into the solid-state power amplifier for amplification, and transmits the interference signals out through the ground transmitting antenna. The BGHz radio frequency signal transmitted by the ground transponder is received by the airborne receiving antenna, converted into a radio frequency signal with the frequency of AGHz through the airborne receiving frequency conversion assembly, amplified by the airborne transmitting assembly and transmitted through the airborne transmitting antenna, and the interference mode of simultaneous receiving and transmitting is completed. The frequency deviation brought by adopting different local oscillators is reduced by using a rubidium clock for three frequency conversion.
Description
Technical Field
The invention belongs to the field of electronic countermeasure, and particularly relates to a method for realizing simultaneous receiving and transmitting of airborne electronic equipment based on frequency conversion.
Background
The on-board jammer uses the simultaneous receiving and transmitting technology, so that the coherent accumulation gain of the interference signal can be improved and the effective interference time can be increased when deception interference is carried out, thereby generating a better interference effect. The current airborne jammer has the common problem of receiving and transmitting isolation, namely, a receiving antenna and a transmitting antenna of the airborne jammer can generate a self-excitation phenomenon, so that the interference performance is influenced, and the airborne jammer is influenced to realize the interference technology of receiving and transmitting simultaneously. The traditional method for solving the isolation of the transceiver increases the interval distance of the transceiver antenna, the installation position of the transceiver antenna is limited by the platform of the carrier, the transceiver antenna can only be installed in the same direction generally and is very close to the carrier, and the airborne jammer and the interfered equipment are generally far away from each other, so that the radiation power of the jammer is relatively large, and the sensitivity of the interfered equipment can be achieved. The larger the power of the transmitted interference signal is, the more easily the phenomenon of self excitation occurs, thereby affecting the work of the jammer, so that the traditional method for improving the receiving and transmitting isolation has great limitation.
The work flow of the traditional airborne jammer is that a receiving antenna receives radar transmitting signals, the radar signals are converted into intermediate frequency signals through a down-conversion component, the intermediate frequency interference signals are sent to a digital component for interference information loading, the intermediate frequency interference signals are output, the intermediate frequency interference signals are sent to an up-conversion component, the intermediate frequency interference signals are converted into radio frequency interference signals with the same frequency as the radar transmitting signals, the radio frequency interference signals are input to a power amplification component, the signals are amplified to obtain amplified interference signals, the amplified interference signals are sent to a transmitting antenna, and the interference signals are transmitted to a space domain.
At present, the development of domestic airborne interference equipment mainly has the following technical bottlenecks: the method has the advantages that the frequency of the received and transmitted radio frequency signals is the same, the spontaneous self-receiving condition is caused, the problem of receiving and transmitting isolation is solved by space isolation, the size of an unmanned aerial vehicle platform for installing an interference machine limits the isolation distance for receiving and transmitting antenna installation, the receiving and transmitting antenna isolation distance is required to be far when receiving and transmitting is required under the condition that the interference power is slightly large, the receiving and transmitting time is very much longer than the length of an unmanned aerial vehicle body, the receiving and transmitting are difficult to realize under the condition, and most unmanned aerial vehicle-mounted interference machines adopt the interference technology of receiving and transmitting time. The traditional airborne jammer has the requirements of carrying capacity and installation space on the airborne platform, so that the traditional airborne jammer cannot be suitable for small-size installation platforms.
Therefore, in order to solve the problem that the on-board interference machine cannot realize the simultaneous receiving and transmitting interference mode due to the limitation of the weight, the size and other factors of the on-board interference machine, the on-board interference machine capable of realizing the simultaneous receiving and transmitting needs to be developed. The method comprises the steps of completing the generation of interference signals in a ground transponder in a mode of cooperative work of the airborne transponder and the ground transponder, converting the radio frequency interference signals generated by the ground transponder into radio frequency signals with different frequencies from radar signals, distinguishing the radio frequency signals from the radar signals, sending the radio frequency signals to the airborne transponder, carrying out frequency conversion processing in the airborne transponder, converting the radio frequency signals sent by the ground transponder into coherent signals with the same frequencies as the radar signals, and sending out the coherent signals to interfere the radar.
The simultaneous receiving and transmitting technology based on frequency conversion can fundamentally solve the problem that the on-board jammer is not easy to realize simultaneous receiving and transmitting, and really meets the flight test and examination requirements of radar interference equipment.
Disclosure of Invention
The invention aims to provide a method for realizing simultaneous transceiving of an airborne electronic device based on frequency conversion, which can realize simultaneous transceiving of an airborne or other small-sized platform jammer, and solves the problem that the airborne jammer cannot realize simultaneous transceiving due to the limitation of a platform.
The technical solution for realizing the purpose of the invention is as follows: the method for realizing the simultaneous receiving and transmitting of the airborne electronic equipment based on frequency conversion comprises the steps of arranging a ground transponder on the ground and arranging the airborne transponder on a carrier platform, wherein the ground transponder comprises a receiving down-conversion assembly, an up-conversion assembly, a digital assembly, a solid-state power amplifier, a ground receiving antenna, a first frequency synthesizer and a ground transmitting antenna; the airborne transponder comprises an airborne receiving antenna, an airborne receiving frequency conversion assembly, an airborne transmitting antenna and a second frequency synthesizer.
A method for realizing simultaneous receiving and transmitting of airborne electronic equipment based on frequency transformation is mainly characterized in that two frequency transformation is realized through two transponders, and an interference technology for simultaneous receiving and transmitting is realized.
A method for realizing the receiving and transmitting of airborne electronic equipment based on frequency transformation, the realization of the receiving and transmitting mainly comprises the following steps:
Step 1, a ground receiving antenna of a ground transponder receives a radio frequency signal emitted by a radar, and the frequency of the radio frequency signal is AGHz.
And 2, the received radar signal is subjected to amplitude limiting and sensitivity control through a receiving down-conversion component, and meanwhile, the radio frequency signal is down-converted to an intermediate frequency and is sent to a digital component.
And 3, acquiring the intermediate frequency signal by the digital component, and performing interference modulation on delay and Doppler modulation of the received signal.
And 5, performing frequency conversion on the interference signal generated by the digital component through the up-conversion component, converting the intermediate frequency signal into a radio frequency signal with the frequency different from that of the radar signal, wherein the frequency is BGHz, and transmitting the signal to the solid-state power amplifier.
And 6, amplifying the radio frequency interference signal with the frequency of BGHz through a solid-state power amplifier.
And 7, transmitting the amplified signals through a transmitting antenna of the ground transponder, wherein the frequency of the amplified signals is BGHz.
And 8, receiving a radio frequency signal sent by the ground transponder by a receiving antenna of the airborne transponder, wherein the frequency of the radio frequency signal is BGHz, and sending the signal to a receiving frequency conversion assembly.
And 9, the receiving frequency conversion assembly performs frequency conversion on the signal to convert the signal into a radio frequency signal with the same frequency as the radar, wherein the frequency of the radio frequency signal is AGHz.
And step 10, amplifying the signal through a transmitting unit of the airborne transponder.
And step 11, the amplified radio frequency signals are sent out through a transmitting antenna of the airborne transponder, and an interference mode of receiving and transmitting is completed.
Compared with the prior art, the invention has the remarkable advantages that: 1) The two components of the airborne interference machine, the airborne transponder and the ground transponder adopt signals with different frequencies, so that the problem of receiving and transmitting isolation is fundamentally solved, and the interference technology of receiving and transmitting simultaneously is realized. 2) The ground transponder is used for realizing intermediate frequency signal processing and interference signal generation, and on the airborne transponder, only signal frequency conversion and signal amplification are carried out, so that the size and weight of airborne interference equipment are greatly reduced, the method can be suitable for mounting and using more small-size and small-weight loading platforms, and the loading platform range of the interference machine is greatly enlarged.
Drawings
Fig. 1 is a block diagram of a method for implementing simultaneous transceiving of an on-board electronic device based on frequency translation.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by one of ordinary skill in the art without creative efforts, are within the scope of the present invention based on the embodiments of the present invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are correspondingly changed.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; the "connection" may be mechanical or electrical. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to base that the technical solutions can be implemented by those skilled in the art, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered to be absent, and not included in the scope of protection claimed in the present invention.
The following describes the specific embodiments, technical difficulties and inventions of the present invention in further detail in connection with the present design examples.
The invention discloses a method for realizing simultaneous receiving and transmitting of an airborne electronic device based on frequency conversion.
The ground transponder comprises a receiving down-conversion assembly, an up-conversion assembly, a digital assembly, a solid-state power amplifier, a ground receiving antenna, a first frequency synthesizer and a ground transmitting antenna, wherein the frequency synthesizer assembly is respectively connected with the receiving down-conversion assembly and the up-conversion assembly, the ground receiving antenna is connected with the receiving down-conversion assembly, the digital assembly is connected with the receiving down-conversion assembly and the up-conversion assembly, the up-conversion assembly is connected with the solid-state power amplifier, and the ground transmitting antenna is connected with the solid-state power amplifier. The first frequency integrated crystal oscillator selects an atomic rubidium clock high-precision clock source, provides local oscillation signals for up-down conversion of the system, provides sampling clock signals for the digital module, and can solve the problem of frequency deviation caused by different local oscillation adopted by the ground transponder and the airborne transponder. The ground transponder receives the radar signal with the frequency AGHz, performs frequency conversion and signal processing, and the interference signal frequency up-converts the generated interference signal into BGHz, is different from the received signal frequency, and sends the signal to the airborne transponder. The ground transponder generates an interference signal without installation, so that the ground transponder is not limited by the installation size and the carrying capacity of the carrier platform, and can generate a broadband complex interference signal and transmit and receive the interference technology at the same time.
The airborne transponder comprises an airborne receiving antenna, an airborne receiving frequency conversion assembly, an airborne transmitting assembly and an airborne transmitting antenna which are sequentially connected, and a second frequency synthesizer, wherein a crystal oscillator in the second frequency synthesizer selects an atomic rubidium clock high-precision clock source to provide local oscillation signals for up-down frequency conversion of the system, and the frequency deviation caused by different local oscillation of the ground transponder and the airborne transponder can be solved while the sampling clock signals are provided for the digital module. The airborne transponder receives the interference signal with the frequency of BGHz transmitted by the ground transponder, carries out frequency conversion processing on the signal, converts the frequency into AGHz, has the same frequency as the radar transmitted signal, and amplifies and transmits the signal.
The method for realizing the simultaneous receiving and transmitting of the airborne electronic equipment based on frequency transformation comprises the following steps:
step 1, a ground receiving antenna of a ground transponder receives a radio frequency signal emitted by a radar, and the frequency of the radio frequency signal is AGHz;
Step 2, performing down-conversion on the radio frequency signals through receiving, performing amplitude control and sensitivity control on the signals, protecting a microwave circuit, avoiding the damage period of high-power input signals, and simultaneously performing down-conversion on the radio frequency signals to an intermediate frequency and transmitting the intermediate frequency to a digital component; the crystal oscillator in the first frequency synthesizer selects an atomic rubidium clock high-precision clock source, provides local oscillation signals for system down-conversion, provides sampling clock signals for the digital module, and can solve the problem of frequency deviation caused by different local oscillation adopted by the ground transponder and the airborne transponder.
Step 3, the digital component performs signal sorting, measurement and identification on the intermediate frequency signals, determines the carrier frequency, pulse width and pulse repetition period of the radar, and obtains intermediate frequency interference signals through delay and Doppler modulation of the intermediate frequency signals;
Step 4, the intermediate frequency interference signal is subjected to frequency conversion through an up-conversion component, the intermediate frequency interference signal is converted into a radio frequency signal with the frequency being AGHz different from the radar signal, the frequency is BGHz, and the signal is sent to a solid-state power amplifier; the crystal oscillator in the first frequency synthesizer selects an atomic rubidium clock high-precision clock source, provides a local oscillator signal for up-conversion of the system, provides a sampling clock signal for the digital module, and can solve the problem of frequency deviation caused by different local oscillators adopted by the ground transponder and the airborne transponder.
Step 6, amplifying the radio frequency interference signal through a solid-state power amplifier to obtain an interference radio frequency signal with the frequency of BGHz;
Step 7, the interference radio frequency signal with the frequency of BGHz is sent out through a ground transmitting antenna of the ground transponder;
Step 8, an airborne receiving antenna of the airborne transponder receives an interference radio frequency signal with the frequency of BGHz sent by the ground transponder and sends the interference radio frequency signal to an airborne receiving frequency conversion assembly;
Step 9, the airborne receiving frequency conversion component carries out frequency conversion on the interference radio frequency signal, and converts the interference radio frequency signal into a radio frequency signal with the same frequency as the radar, wherein the frequency of the radio frequency signal is AGHz; the crystal oscillator in the second frequency synthesizer selects an atomic rubidium clock high-precision clock source, provides local oscillation signals for system down-conversion, provides sampling clock signals for the digital module, and can solve the problem of frequency deviation caused by different local oscillation adopted by the ground transponder and the airborne transponder.
And 10, amplifying the signal through an airborne transmitting assembly of an airborne transponder to obtain an amplified signal with the frequency of AGHz.
And step 11, the amplified signals are sent out through an onboard transmitting antenna of the onboard transponder, and an interference mode of receiving and transmitting is completed.
Claims (3)
1. A method for realizing the receiving and transmitting of airborne electronic equipment based on frequency transformation is characterized in that: the ground transponder is arranged on the ground, the airborne transponder is arranged on the carrier platform, and the mode of twice frequency change is adopted, and the specific steps are as follows:
step 1, a ground receiving antenna of a ground transponder receives a radio frequency signal emitted by a radar, and the frequency of the radio frequency signal is AGHz;
Step 2, performing down-conversion on the radio frequency signals through receiving, performing amplitude control and sensitivity control on the signals, protecting a microwave circuit, avoiding the damage period of high-power input signals, and simultaneously performing down-conversion on the radio frequency signals to an intermediate frequency and transmitting the intermediate frequency to a digital component; the crystal oscillator in the first frequency synthesizer selects an atomic rubidium clock high-precision clock source, provides a local oscillation signal for system down-conversion, provides a sampling clock signal for a digital module, and can solve the problem of frequency deviation caused by different local oscillation adopted by a ground transponder and an airborne transponder;
step 3, the digital component performs signal sorting, measurement and identification on the intermediate frequency signals, determines the carrier frequency, pulse width and pulse repetition period of the radar, and obtains intermediate frequency interference signals through delay and Doppler modulation of the intermediate frequency signals;
Step 4, the intermediate frequency interference signal is subjected to frequency conversion through an up-conversion component, the intermediate frequency interference signal is converted into a radio frequency signal with the frequency being AGHz different from the radar signal, the frequency is BGHz, and the signal is sent to a solid-state power amplifier; the crystal oscillator in the first frequency synthesizer selects an atomic rubidium clock high-precision clock source, provides a local oscillator signal for up-conversion of the system, provides a sampling clock signal for the digital module, and can solve the problem of frequency deviation caused by different local oscillators adopted by the ground transponder and the airborne transponder;
Step 6, amplifying the radio frequency interference signal through a solid-state power amplifier to obtain an interference radio frequency signal with the frequency of BGHz;
Step 7, the interference radio frequency signal with the frequency of BGHz is sent out through a ground transmitting antenna of the ground transponder;
Step 8, an airborne receiving antenna of the airborne transponder receives an interference radio frequency signal with the frequency of BGHz sent by the ground transponder and sends the interference radio frequency signal to an airborne receiving frequency conversion assembly;
Step 9, the airborne receiving frequency conversion component carries out frequency conversion on the interference radio frequency signal, and converts the interference radio frequency signal into a radio frequency signal with the same frequency as the radar, wherein the frequency of the radio frequency signal is AGHz; the crystal oscillator in the second frequency synthesizer selects an atomic rubidium clock high-precision clock source, provides a local oscillation signal for system down-conversion, provides a sampling clock signal for the digital module, and can solve the problem of frequency deviation caused by different local oscillation adopted by the ground transponder and the airborne transponder;
step 10, amplifying the signal through an airborne transmitting assembly of an airborne transponder to obtain an amplified signal with the frequency of AGHz;
And step 11, the amplified signals are sent out through an onboard transmitting antenna of the onboard transponder, and an interference mode of receiving and transmitting is completed.
2. The method for realizing the simultaneous transceiving of the on-board electronic equipment based on the frequency transformation according to claim 1, wherein the method comprises the following steps of: the ground transponder comprises a receiving down-conversion assembly, an up-conversion assembly, a digital assembly, a solid-state power amplifier, a ground receiving antenna, a first frequency synthesizer and a ground transmitting antenna, wherein the frequency synthesizer assembly is respectively connected with the receiving down-conversion assembly and the up-conversion assembly; the first frequency integrated crystal oscillator selects an atomic rubidium clock high-precision clock source, the ground transponder receives radar signals with the frequency of AGHz, performs frequency conversion and signal processing, and up-converts the generated interference signals into BGHz, is different from the received signals in frequency, and sends the interference signals to the airborne transponder.
3. The method for realizing the simultaneous transceiving of the on-board electronic equipment based on the frequency transformation according to claim 1, wherein the method comprises the following steps of: the ground transponder generates an interference signal and is not installed.
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