CN103441770B - Wideband receiving channels, receiver and receiving method with amplitude and phase compensation - Google Patents
Wideband receiving channels, receiver and receiving method with amplitude and phase compensation Download PDFInfo
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- CN103441770B CN103441770B CN201310375018.5A CN201310375018A CN103441770B CN 103441770 B CN103441770 B CN 103441770B CN 201310375018 A CN201310375018 A CN 201310375018A CN 103441770 B CN103441770 B CN 103441770B
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Abstract
The invention relates to wideband receiving channels, a receiver and a receiving method with amplitude and phase compensation. The multiple channels work at the same time, and different bandwidth filters perform gate filtering to filter radar echo signals. Each channel comprises a first front middle module, a second front middle module and a control detection module. The first front middle modules receive the radar echo signals and perform phase shift, amplitude compensation and primary down-conversion on the radar echo signals, and then the radar echo signals are sent to the second front middle modules for secondary down-conversion; one path of a plurality of filter banks which are connected in parallel and different in bandwidth is gated according to signal bandwidth to perform medium frequency filtering, and meanwhile amplitude and phase compensation is further performed on the path of the filter banks; the control detection modules control the first front middle modules and the second front middle modules. Due to the wideband receiving channels, the receiver and the receiving method, the problem that a receiver is poor in consistency of amplitude and phase under wideband work frequency is solved, multiple medium frequency work bandwidths capable of being switched are acquired, and the advantages of being good in consistency of bandwidth, amplitude and phase and high in universality are achieved.
Description
Technical field
The present invention relates to Radar Receiver Technology, particularly relate to a kind of broadband reception passage of amplitude and phase compensation, receiver and method of reseptance thereof.
Background technology
Conventional radar receiver mostly is narrow-band receiver, even if the receiver in broadband also only has a kind of fixed-bandwidth, causes radar function more single, and is often limited to amplitude and phase equalization problem, affect the performance of radar performance.In order to adapt to the growth requirement of multifunction radar, adopt wideband phased array technology, the broadband receiver with multi-signal bandwidth has just arisen at the historic moment.
The key of broadband receiver is the device adopting broadband, and adopts the method for science to carry out filtering, and filtering affects the spurious signal of receiver performance.Broadband receiver is high due to bandwidth requirement, and the components and parts kind that can select is just relatively less, and, bandwidth of operation widen the deterioration being easy to cause receiver spurious signal.Meanwhile, bandwidth widen the consistency that also have impact on amplitude, phase place between each passage of receiver.
Summary of the invention
The first object of the present invention is the broadband reception passage providing a kind of amplitude and phase compensation, achieves the consistency of different signals through receive path process amplitude, phase place, and effectively solves the deterioration problem of broadband signal spurious signal in receiving course.
The second object of the present invention is the broadband receiver providing a kind of amplitude and phase compensation, achieves the consistency of amplitude, phase place between each passage, and effectively solves the deterioration problem of broadband signal spurious signal in receiving course.
The third object of the present invention is the broadband receiving method providing a kind of amplitude and phase compensation, achieves the consistency of different signals through broadband reception process amplitude, phase place, and effectively solves the deterioration problem of broadband signal spurious signal in the process received.
In order to realize above-mentioned first object, the invention provides a kind of broadband reception passage of amplitude and phase compensation, comprising module in before first, the second front middle module and controlling detection module, wherein:
Module in before described first, a radar echo signal is accessed at its input, after successively low noise amplification, phase compensation and Amplitude Compensation are carried out to described radar echo signal, carry out first time mixing with one first local oscillation signal, thus export one first intermediate-freuqncy signal;
Module in before described second, in described first intermediate-freuqncy signal of its input access, and after successively Amplitude Compensation and sensitivity-frequency control are carried out to it, carry out second time mixing with one second local oscillation signal and obtain one second intermediate-freuqncy signal, and switch gating and described second intermediate-freuqncy signal and to match the filter of bandwidth, filtering is carried out to described second intermediate-freuqncy signal, after finally automatic growth control being carried out to described second intermediate-freuqncy signal, exports an if radar echo-signal;
Described control detection module, be connected with front module in front module in described first and described second, thus according to the frequency band range of described radar echo signal, control the sensitivity-frequency control function of module in before the phase compensation function of module in before described first, Amplitude Compensation function and described second, automatic gain control function, Amplitude Compensation function and the bandwidth according to described radar echo signal and switch gating and described second intermediate-freuqncy signal and to match the filter of bandwidth.
As preferably, in before described first, module comprises the low noise amplifier, phase compensation block, the first Amplitude Compensation module and the first frequency mixer that connect successively, and the access to described first frequency mixer is used for described first local oscillation signal of described first time mixing.
As preferably, in before described second module comprise connect successively the second amplitude compensator, sensitivity time control, the second frequency mixer, the first filter selection switch circuit, some parallel connections filter, second filter selection switch circuit and the automatic gain control circuit of different bandwidth, and be used for described second local oscillation signal of described second time mixing to described second frequency mixer access.
As preferably, described phase compensation block is a voltage-controlled phase shifter.
As preferably, described first Amplitude Compensation module and described second Amplitude Compensation module are an amplitude equalizer.
In order to realize above-mentioned second object, the invention provides a kind of broadband receiver of amplitude and phase compensation, comprising some broadband reception passages, the first local oscillator module and the second local oscillator module, wherein:
Described first local oscillator module is carried out merit to one first former local oscillation signal and is divided and amplify thus produce the first identical local oscillation signal of some roads, described second local oscillator module is carried out merit to one second former local oscillation signal and is divided and amplify thus produce the second identical local oscillation signal of some roads, first local oscillator module and the second local oscillator module are according to the port number of Received signal strength, and what be respectively each passage of Received signal strength provides the first local oscillation signal and the second local oscillation signal;
Arbitrary broadband reception passage in described some broadband reception passages includes module in before described first, the described second front middle module and controls detection module, wherein:
Module in before described first, a radar echo signal is accessed at its input, after successively low noise amplification, phase compensation and Amplitude Compensation are carried out to described radar echo signal, carry out first time mixing with one first local oscillation signal, thus export one first intermediate-freuqncy signal;
Module in before described second, in described first intermediate-freuqncy signal of its input access, and after successively Amplitude Compensation and sensitivity-frequency control are carried out to it, carry out second time mixing with one second local oscillation signal and obtain one second intermediate-freuqncy signal, and switch gating and described second intermediate-freuqncy signal and to match the filter of bandwidth, filtering is carried out to described second intermediate-freuqncy signal, after finally automatic growth control being carried out to described second intermediate-freuqncy signal, exports an if radar echo-signal;
Described control detection module, be connected with front module in front module in described first and described second, thus according to the frequency band range of described radar echo signal, control the sensitivity-frequency control function of module in before the phase compensation function of module in before described first, Amplitude Compensation function and described second, automatic gain control function, Amplitude Compensation function and the bandwidth according to described radar echo signal and switch gating and described second intermediate-freuqncy signal and to match the filter of bandwidth.
As preferably, in before described first, module comprises the low noise amplifier, phase compensation block and the first Amplitude Compensation module that connect successively, is used for described first local oscillation signal of described first time mixing in the output access of described first amplitude equalizer.
As preferably, in before described second module comprise connect successively the second amplitude compensator, sensitivity time control, the first filter selection switch circuit, some parallel connections filter, second filter selection switch circuit and the automatic gain control circuit of different bandwidth, and access is used for described second local oscillation signal of described second time mixing between described sensitivity time control and described filter switch.
As preferably, described phase compensation block is a voltage-controlled phase shifter.
As preferably, described first Amplitude Compensation module and described second Amplitude Compensation module are an amplitude equalizer.
In order to realize above-mentioned 3rd object, the invention provides a kind of broadband receiving method of amplitude and phase compensation, comprising the following steps:
S1: to a radar echo signal carry out successively low noise amplification, phase compensation and first time Amplitude Compensation after, carry out first time mixing with one first local oscillation signal, obtain one first intermediate-freuqncy signal;
S2: after successively second time Amplitude Compensation, sensitivity-frequency control are carried out to described first intermediate-freuqncy signal, carry out second time mixing with one second local oscillation signal, obtain one second intermediate-freuqncy signal;
S3: according to the bandwidth of described radar echo signal, switches the filter matched with described second intermediate-freuqncy signal bandwidth in the filter of the different bandwidth of the some parallel connections of gating, carries out filtering to described second intermediate-freuqncy signal;
S4: export an if radar echo-signal after automatic growth control is carried out to described second intermediate-freuqncy signal.
As preferably, described phase compensation is realized by a voltage-controlled phase shifter.
As preferably, described first time Amplitude Compensation and described second time Amplitude Compensation be realize respectively by an amplitude equalizer.
The present invention, owing to adopting above technical scheme, makes it compared with prior art, has following advantage and good effect:
1) have employed phase compensation, Amplitude Compensation technology, according to the difference of each channel phases, control corresponding phase compensation amount, and in real time Amplitude Compensation is carried out to the first intermediate frequency and the second intermediate-freuqncy signal, achieve the coherence request of different signals through receive path process amplitude, phase place.
2) filter of some parallel connections is devised, according to the bandwidth of radar echo signal, switch corresponding filter and filtering is carried out to the second intermediate-freuqncy signal, effectively solve the deterioration of spurious signal in broadband signal receiving course, and achieve the multiple intermediate frequency bandwidth of operation that can switch.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the broadband receiver of a kind of amplitude and phase compensation of the present invention;
Fig. 2 is the structured flowchart of the first broadband reception passage 1 in Fig. 1;
Fig. 3 is the flow chart of the broadband receiving method of a kind of amplitude and phase compensation of the present invention.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings with specific embodiment.
See the accompanying drawing that the embodiment of the present invention is shown, hereafter in more detail the present invention will be described.But the present invention can realize in many different forms, and should not be construed as by the restriction in the embodiment of this proposition.On the contrary, it is abundant and complete open in order to reach for proposing these embodiments, and makes those skilled in the art understand scope of the present invention completely.
Embodiment one
Accompanying drawing 1 is the block diagram of the broadband receiver of a kind of amplitude and phase compensation provided by the invention, and as a preferred embodiment of the broadband reception passage of a kind of amplitude and phase compensation provided by the invention, it comprises:
First broadband reception passage 1 and the second broadband reception passage 2, first local oscillator module 3 and the second local oscillator module 4, wherein:
First local oscillator module 3 is carried out merit to one first former local oscillation signal 31 and is divided and amplify thus produce the first identical local oscillation signal 32 of some roads, second local oscillator module 4 is carried out merit to one second former local oscillation signal 41 and is divided and amplify thus produce the second identical local oscillation signal 42, first local oscillator module 3 of two-way and the second local oscillator module 4 and be respectively the first broadband reception passage 1 of Received signal strength and the second broadband reception passage 2 provides the first local oscillation signal 32 and the second local oscillation signal 42.
Each receive path circuit design of multichannel receiver is consistent, for radar system, can be divided into and passage, gun parallax passage, trim passage and accessory channel etc.Should be understood that the present invention does not limit the quantity of bandwidth receive path, also can be three, four or more, and the present embodiment elaborates for the broadband receiver containing two passages, other numbers of channels situation should the rest may be inferred.
Internal structure in first broadband reception passage 1 and the second broadband reception passage 2 is completely the same, for the first broadband reception passage 1, as shown in Figure 1, to comprise in before first in before module 11, second module 12 and controls detection module 13, wherein:
In before first, module 11 comprises the low noise amplifier 111, phase compensation block 112, first Amplitude Compensation module 113 and the first frequency mixer 114 that connect successively, and in the first frequency mixer 114, access is used for the first local oscillation signal 32 of first time mixing.
According to the difference of each channel phases, control corresponding phase compensation amount.Phase compensation block 113 is voltage-controlled phase shifter preferably, and it just can carry out regulable control to phase shifter by a voltage, also can adopt digital phase shifter etc.First Amplitude Compensation module adopts an amplitude equalizer, amplitude equalizer is passive device, under comparatively low-signal frequencies, there is larger insertion loss, under higher signal frequencies, there is less insertion loss, therefore can compensate in real time the amplitude imbalance of signal in broadband range.Its median filter can be LC filter, Surface Acoustic Wave Filter, LTCC filter etc.
In before second, module 12 comprises the second amplitude compensator 121, filter 125, the second filter selection switch circuit 126 of sensitivity time control 122, second frequency mixer 123, first filter selection switch circuit 124, four different bandwidths in parallel and the automatic gain control circuit 127 that connect successively, and access is used for the second local oscillation signal 42 of second time mixing in the second frequency mixer 123.
Second Amplitude Compensation module also adopts an amplitude equalizer.And sensitivity time control makes receiver prevent the random wave interference intermediate frequency amplifier of short range in the process of Received signal strength.The filter that have employed four different bandwidths is herein in parallel, and pass through to arrange the first filter selection switch circuit 124 and the second filter selection switch circuit 126 respectively before and after the filter 125 of four different bandwidths in parallel, when a gating filter, the interference of other three filters can be isolated more up hill and dale.According to the bandwidth of radar echo signal, switch corresponding filter and filtering is carried out to the second intermediate-freuqncy signal 127, effectively solve the deterioration of spurious signal in broadband signal receiving course, and the selection of multi-signal bandwidth is provided.
Should be understood that the present invention does not limit the quantity of the filter of the obstructed bandwidth of parallel connection, also can be two, three, five etc.
Control detection module 13, be connected with front module 12 in front module in first 11 and second, thus according to the frequency band range of radar echo signal, control the sensitivity-frequency control function of module 12 in before the phase compensation function of module 11 in before first, Amplitude Compensation function and second, automatic gain control function, Amplitude Compensation function and the bandwidth according to radar echo signal and switch gating and the second intermediate-freuqncy signal and to match the filter of bandwidth.
The course of work of described radar echo signal receiver channel is:
After in before first, module input accesses a radar echo signal, after successively low noise amplification, phase compensation and Amplitude Compensation are carried out by control detection module to radar echo signal, carry out first time mixing with one first local oscillation signal, thus export one first intermediate-freuqncy signal 115, first Amplitude Compensation module is an amplitude equalizer, module in before second, the first intermediate-freuqncy signal is accessed at its input, and after successively Amplitude Compensation and sensitivity-frequency control are carried out to it, carry out second time mixing with one second local oscillation signal and obtain one second intermediate-freuqncy signal, and switch gating and the second intermediate-freuqncy signal and to match the filter of bandwidth, filtering is carried out to described second intermediate-freuqncy signal, an if radar echo-signal 128 is exported after finally automatic growth control being carried out to described second intermediate-freuqncy signal, the echo signal of intermediate frequency 128 that this broadband receiver finally exports has certain bandwidth, meet amplitude and phase equalization requirement, signal transacting can be carried out.
Embodiment two
Accompanying drawing 3 is the flow chart of the broadband receiving method of a kind of amplitude and phase compensation of the present invention, below describes the broadband receiving method of a kind of amplitude and phase compensation provided by the invention in detail.
S1: to a radar echo signal carry out successively low noise amplification, phase compensation and first time Amplitude Compensation after, first time mixing is carried out with one first local oscillation signal, obtain one first intermediate-freuqncy signal, wherein phase compensation is the adequate compensation made according to the phase place of radar echo signal.
Phase compensation is realized by a voltage-controlled phase shifter, and it just can carry out regulable control to phase shifter by a voltage, also can adopt digital phase shifter etc.Amplitude Compensation is realized by an amplitude equalizer for the first time.Amplitude equalizer is passive device, has larger insertion loss, have less insertion loss, therefore can compensate in real time the amplitude imbalance of signal in broadband range under higher signal frequencies under comparatively low-signal frequencies.By phase compensation, Amplitude Compensation technology, according to the difference of each channel phases, control corresponding phase compensation amount, and in real time Amplitude Compensation is carried out to the first intermediate frequency and the second intermediate-freuqncy signal, achieve the coherence request of different signals through receive path process amplitude, phase place.
S2: after carrying out second time Amplitude Compensation, sensitivity-frequency control successively to the first intermediate-freuqncy signal, carries out second time mixing with one second local oscillation signal, obtains one second intermediate-freuqncy signal.
Sensitivity Time Control Technique is the common technology in radar, and it, for avoiding nearly thing noise jamming, makes receiver sensitivity decline instantaneously at pulses of radiation, a kind of technology then increased according to certain rules.Second time Amplitude Compensation is also realized by an amplitude equalizer.
S3: according to the bandwidth of radar echo signal, switches the filter matched with the second intermediate-freuqncy signal bandwidth in the filter of the different bandwidth of the some parallel connections of gating, carries out filtering to the second intermediate-freuqncy signal;
The present embodiment, by the filter of some parallel connections, according to the bandwidth of radar echo signal, switches corresponding filter and carries out filtering to the second intermediate-freuqncy signal, effectively solves the deterioration of spurious signal in broadband signal receiving course, and provides the selection of multi-signal bandwidth.Its median filter can be LC filter, Surface Acoustic Wave Filter, LTCC filter etc.
S4: export an if radar echo-signal after automatic growth control is carried out to the second intermediate-freuqncy signal.
Wherein, the effect of automatic growth control is can according to the size of the voltage of input signal, and the gain of adjustment amplifier, makes the output voltage of amplifier change within the specific limits, can carry out follow-up signal transacting automatically.
Be only specific embodiments of the invention disclosed in above-mentioned, this embodiment is only that clearer explanation the present invention is used, and is not limitation of the invention, and the changes that any person skilled in the art can think of, all should drop in protection range.
Claims (13)
1. a broadband reception passage for amplitude and phase compensation, is characterized in that, comprises module in before first, the second front middle module and controls detection module, wherein:
Module in before described first, a radar echo signal is accessed at its input, after successively low noise amplification, phase compensation and Amplitude Compensation are carried out to described radar echo signal, carry out first time mixing with one first local oscillation signal, thus export one first intermediate-freuqncy signal;
Module in before described second, in described first intermediate-freuqncy signal of its input access, and after successively Amplitude Compensation and sensitivity-frequency control are carried out to it, carry out second time mixing with one second local oscillation signal and obtain one second intermediate-freuqncy signal, and switch gating and described second intermediate-freuqncy signal and to match the filter of bandwidth, filtering is carried out to described second intermediate-freuqncy signal, after finally automatic growth control being carried out to described second intermediate-freuqncy signal, exports an if radar echo-signal;
Described control detection module, be connected with middle module before module middle before described first and described second, thus according to the frequency band range of described radar echo signal, control the sensitivity-frequency control function of module in before the phase compensation function of module in before described first, Amplitude Compensation function and described second, automatic gain control function, Amplitude Compensation function and the bandwidth according to described radar echo signal and switch gating and described second intermediate-freuqncy signal and to match the filter of bandwidth.
2. the broadband reception passage of a kind of amplitude and phase compensation as claimed in claim 1, it is characterized in that, in before described first, module comprises the low noise amplifier, phase compensation block, the first Amplitude Compensation module and the first frequency mixer that connect successively, access, for first time mixing to described first frequency mixer together with described first local oscillation signal.
3. the broadband reception passage of a kind of amplitude and phase compensation as claimed in claim 2, it is characterized in that, in before described second module comprise connect successively the second amplitude compensator, sensitivity time control, the second frequency mixer, the first filter selection switch circuit, some parallel connections filter, second filter selection switch circuit and the automatic gain control circuit of different bandwidth, and be used for described second local oscillation signal of described second time mixing to described second frequency mixer access.
4. the broadband reception passage of a kind of amplitude and phase compensation as claimed in claim 2, is characterized in that, described phase compensation block is a voltage-controlled phase shifter.
5. the broadband reception passage of a kind of amplitude and phase compensation as claimed in claim 3, is characterized in that, described first Amplitude Compensation module and described second Amplitude Compensation module are an amplitude equalizer.
6. a broadband receiver for amplitude and phase compensation, is characterized in that, comprises some broadband reception passages, the first local oscillator module and the second local oscillator module, wherein:
Described first local oscillator module is carried out merit to one first former local oscillation signal and is divided and amplify thus produce the first identical local oscillation signal of some roads, described second local oscillator module is carried out merit to one second former local oscillation signal and is divided and amplify thus produce the second identical local oscillation signal of some roads, first local oscillator module and the second local oscillator module are according to the port number of Received signal strength, and each passage being respectively Received signal strength provides the first local oscillation signal and the second local oscillation signal;
Arbitrary broadband reception passage in described some broadband reception passages includes module in before first, the second front middle module and controls detection module, wherein:
Module in before described first, a radar echo signal is accessed at its input, after successively low noise amplification, phase compensation and Amplitude Compensation are carried out to described radar echo signal, carry out first time mixing with one first local oscillation signal, thus export one first intermediate-freuqncy signal;
Module in before described second, in described first intermediate-freuqncy signal of its input access, and after successively Amplitude Compensation and sensitivity-frequency control are carried out to it, carry out second time mixing with one second local oscillation signal and obtain one second intermediate-freuqncy signal, and switch gating and described second intermediate-freuqncy signal and to match the filter of bandwidth, filtering is carried out to described second intermediate-freuqncy signal, after finally automatic growth control being carried out to described second intermediate-freuqncy signal, exports an if radar echo-signal;
Described control detection module, be connected with middle module before module middle before described first and described second, thus according to the frequency band range of described radar echo signal, control the sensitivity-frequency control function of module in before the phase compensation function of module in before described first, Amplitude Compensation function and described second, automatic gain control function, Amplitude Compensation function and the bandwidth according to described radar echo signal and switch gating and described second intermediate-freuqncy signal and to match the filter of bandwidth.
7. the broadband receiver of a kind of amplitude and phase compensation as claimed in claim 6, it is characterized in that, in before described first, module comprises the low noise amplifier, phase compensation block, the first Amplitude Compensation module and the first frequency mixer that connect successively, and is used for described first local oscillation signal of described first time mixing to described first frequency mixer access.
8. the broadband receiver of a kind of amplitude and phase compensation as claimed in claim 7, it is characterized in that, in before described second module comprise connect successively the second amplitude compensator, sensitivity time control, the second frequency mixer, the first filter selection switch circuit, some parallel connections filter, second filter selection switch circuit and the automatic gain control circuit of different bandwidth, and be used for described second local oscillation signal of described second time mixing to described second frequency mixer access.
9. the broadband receiver of a kind of amplitude and phase compensation as claimed in claim 7, is characterized in that, described phase compensation block is a voltage-controlled phase shifter.
10. the broadband receiver of a kind of amplitude and phase compensation as claimed in claim 8, is characterized in that, described first Amplitude Compensation module and described second Amplitude Compensation module are an amplitude equalizer.
The broadband receiving method of 11. 1 kinds of amplitude and phase compensations, is characterized in that, comprises the following steps:
S1: to a radar echo signal carry out successively low noise amplification, phase compensation and first time Amplitude Compensation after, carry out first time mixing with one first local oscillation signal, obtain one first intermediate-freuqncy signal;
S2: after successively second time Amplitude Compensation, sensitivity-frequency control are carried out to described first intermediate-freuqncy signal, carry out second time mixing with one second local oscillation signal, obtain one second intermediate-freuqncy signal;
S3: according to the bandwidth of described radar echo signal, switches the filter matched with described second intermediate-freuqncy signal bandwidth in the filter of the different bandwidth of the some parallel connections of gating, carries out filtering to described second intermediate-freuqncy signal;
S4: export an if radar echo-signal after automatic growth control is carried out to described second intermediate-freuqncy signal.
The broadband receiving method of 12. a kind of amplitude and phase compensations as claimed in claim 11, is characterized in that, described phase compensation is realized by a voltage-controlled phase shifter.
The broadband receiving method of 13. a kind of amplitude and phase compensations as claimed in claim 11, is characterized in that, described first time Amplitude Compensation and described second time Amplitude Compensation be realize respectively by an amplitude equalizer.
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| CN105334499A (en) * | 2015-11-23 | 2016-02-17 | 无锡市雷华科技有限公司 | X-waveband coast defense searching radar receiving channel |
| CN106932659B (en) * | 2017-03-21 | 2019-04-26 | 成都雷电微力科技有限公司 | A kind of test method based on multichannel composite noise coefficient |
| CN109782237B (en) * | 2017-11-10 | 2022-05-06 | 北京航天万源科技有限公司 | Radar simulated echo and interference signal measuring device |
| CN108344979A (en) * | 2018-01-26 | 2018-07-31 | 西安电子工程研究所 | A kind of receiver for CW radar based on multiphase filtering |
| KR102077000B1 (en) * | 2018-01-29 | 2020-04-07 | 주식회사 만도 | Apparatus and Method for compensating refection loss of antenna for Radar, and Radar Apparatus using the same |
| CN109004906A (en) * | 2018-08-22 | 2018-12-14 | 北京遥感设备研究所 | A kind of converter plant of optional bandwidth |
| CN109541309B (en) * | 2018-12-18 | 2020-12-01 | 深圳市鼎阳科技股份有限公司 | Spectrum analyzer and signal processing method thereof |
| CN111130573B (en) * | 2019-12-18 | 2021-11-05 | 江苏华讯电子技术有限公司 | Circuit for improving amplitude-phase consistency of broadband variable-frequency receiving module |
| CN112255605B (en) * | 2020-11-24 | 2023-08-22 | 武汉滨湖电子有限责任公司 | Multichannel receiver gain compensation system for amplitude comparison height measurement radar |
| CN112763983B (en) * | 2020-12-25 | 2022-04-26 | 四川九洲空管科技有限责任公司 | Pairing device for secondary radar channel signals |
| CN114509727A (en) * | 2022-01-27 | 2022-05-17 | 中国电子科技集团公司第五十五研究所 | Phase compensation circuit and phase compensation method of ultra-wideband multi-channel frequency conversion link |
| CN114779179A (en) * | 2022-06-20 | 2022-07-22 | 成都远望探测技术有限公司 | Anti-saturation receiving circuit based on meteorological radar |
| CN117008071B (en) * | 2023-10-07 | 2023-12-12 | 广东大湾区空天信息研究院 | Linear frequency modulation MIMO radar channel calibration method and related equipment |
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