CN103018731A - Radio-frequency hardware time domain gate circuit based on narrow-pulse modulators - Google Patents
Radio-frequency hardware time domain gate circuit based on narrow-pulse modulators Download PDFInfo
- Publication number
- CN103018731A CN103018731A CN201210576157XA CN201210576157A CN103018731A CN 103018731 A CN103018731 A CN 103018731A CN 201210576157X A CN201210576157X A CN 201210576157XA CN 201210576157 A CN201210576157 A CN 201210576157A CN 103018731 A CN103018731 A CN 103018731A
- Authority
- CN
- China
- Prior art keywords
- pulse
- signal
- time domain
- baseband signal
- narrow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention provides a radio-frequency hardware time domain gate circuit based on narrow-pulse modulators so as to effectively suppress environmental noise jamming finally and improve RCS (radar cross-section) measurement precision by giving consideration to high time domain resolution ratio, good time domain filtering effect and excellent passband characteristics. The radio-frequency hardware time domain gate circuit based on the narrow-pulse modulators comprises a multi-channel pulse baseband signal generation module, a first narrow-pulse modulator and a second narrow-pulse modulator, the multi-channel pulse baseband signal generation module is used for generating first baseband signals and second baseband signals, the second baseband signals are generated by taking the first baseband signals as a benchmark and by means of delaying, the first narrow-pulse modulator is used for receiving continuous-wave signals generated by a radio-frequency signal source, modulating by the first baseband signals, outputting pulse modulating signals and sending the signals through a complete machine transmitting port, and the second narrow-pulse modulator is used for receiving amplified echo signals, uses the second baseband signals for controlling on-off time and outputs target area signals.
Description
Technical field
The present invention relates to the Radar Technology field, particularly a kind of radio frequency hardware time domain gate circuit based on narrow pulse modulator.
Background technology
RCS is that the quantitatively characterizing target is to the physical quantity of radar illumination scattering of wave power.Along with the fast development of electronic warfare, the extensive use of stealthy weapon becomes a notable feature of modern war.Stealth technology can effectively reduce the distance that radar is found target, becomes the important means that strengthens the assault ability or protect self.The Stealth Fighter of target depends primarily on the size of its RCS (Radar Cross-Section, RCS), thereby with the whole bag of tricks reducing radar scattering cross section, just becomes the main target of research stealth technology.Development along with stealth technology, the RCS characteristic of various stealthy equipments also becomes the order of magnitude to descend, this has just proposed new challenge for the RCS measuring technology that runs through in equipment preparation, production and the process of the test, requires the RCS test macro to have less RCS power of test, higher measuring accuracy and accuracy.
For low scattering RCS test macro, the impact of various reflection interference is key factors that cause the RCS test error in the environment of place.Figure 1 shows that the time domain distribution situation of each the main echo that receives under the typical Compact Range test environment, comprise transmitting-receiving leakage signal 15, reflecting surface echoed signal 16, feed echoed signal 17, target echo signal 18 and rear wall reflected signal 19.Can see that by Fig. 1 for little RCS value target, the strong reflection in the place will be more much bigger than target echo signal.For accurate receiving target echoed signal, just need to adopt various measures and suppress strongly disturbing impact, traditional disposal route mainly comprises software time domain gate technique and intermediate frequency hardware time domain gate technique.
Software time domain gate technique is a kind of effective way that can effectively remove some undesired signals that can separate on distance, its principle is that system carries out the swept continuous wave test, by amplitude and the phase data of obtaining frequency domain echo signal under certain frequency span, carry out again the time-domain curve that inverse Fourier transform can obtain receiving echoed signal.Add door for the software time domain, on time domain, data are multiplied by a window function in fact exactly, with we wish that other data that obtain outside the data block on the time domain, only keep the data of software door inside.For software time domain gate technique, its time resolution only homologous ray frequency sweep bandwidth is inversely proportional to, and therefore can improve time resolution by increasing the frequency sweep bandwidth, has preferably time domain resolving effect, can be used for removing the nearer various undesired signals of distance objective.
As shown in Figure 2, intermediate frequency time domain gate technique is that system launches pulse-modulated signal, this signal arrives receiver after the target reflection, receiver is with the amplification of echoed signal process amplifier 201 radio frequency door time domains, again by obtaining intermediate-freuqncy signal after frequency mixer 202 and local oscillation signal 203 mixing, by increasing gate controlled switch 204 in intermediate-freuqncy signal, the break-make of control receiver intermediate-freuqncy signal realizes only allowing useful intermediate-freuqncy signal pass through to suppress undesired signal constantly, and then reaches the purpose of filtering undesired signal on time domain.Because the on-off ratio characteristic of intermediate frequency gate controlled switch is better, therefore various interference far away can reach preferably time domain hardware filtering effect for distance objective on the time domain.
For software time domain door, what adopt is the artificial intercepting of the method realization time domain data of mathematical operation, although the method has preferably time resolution, but thisly only will inevitably cause error by the truncation effect of processing on the software, show that frequency domain is exactly gibbs (Gibbs) effect, this effect causes the fluctuation in passband and the stopband, has exactly certain ripple corresponding to window function in passband, and the attenuation characteristic in the stopband also is limited simultaneously.Particularly when undesired signal during much larger than target echo signal, removal effect is unsatisfactory, will cause larger error to the result.
For intermediate frequency hardware time domain door, because gate controlled switch is placed on the intermediate frequency path, and IF-FRE is lower, so the shortcoming such as intermediate-frequency bandwidth is limited, and this enough narrow, time resolution that just cause the gate-width degree to arrange is relatively poor.This shortcoming causes can't effectively removing with the various undesired signals of target echo close together, and the practicality of technology is not strong.
Summary of the invention
The present invention proposes a kind of radio frequency hardware time domain gate circuit based on narrow pulse modulator, by taking into account higher time resolution, preferably time-domain filtering effect and excellent pass-band performance, finally reach the noise jamming of establishment environment, improve the purpose of rcs measurement precision.
Technical scheme of the present invention is achieved in that
A kind of radio frequency hardware time domain gate circuit based on narrow pulse modulator comprises: multiplex pulse baseband signal generation module, produce the first baseband signal and the second baseband signal, and the second baseband signal is take the first baseband signal as benchmark, through the time-delay generation; The first narrow pulse modulator, the continuous wave signal that the received RF signal source produces is modulated by described the first baseband signal, exports pulse-modulated signal, and sends by the complete machine emission port; The second narrow pulse modulator receives the echoed signal through amplifying, and its break-make is constantly by described the second baseband signal control, export target regional signal.
Alternatively, described multiplex pulse baseband signal generation module comprises FPGA circuit and external circuit, and the FPGA circuit is finished counting and the minute adjustment of baseband signal cycle, pulsewidth, and produces baseband signal, and external circuit is finished the Shape correction of pulse edge characteristic.
Alternatively, described FPGA circuit comprises: clock module, for all counters and precise regulation circuit provide public reference clock; The first counter, this counter are period counter, and according to the PRT generation periodic signal of default, this periodic signal is as the enabling signal of back two-way pulse; The second counter and the first precise regulation circuit, the baseband signal that produce take described periodic signal as the cycle, pulse width satisfies the setting requirement; The 3rd counter, the second precise regulation circuit, four-counter and the 3rd precise regulation circuit, wherein the 3rd counter and the second precise regulation circuit are the time-delay control section, four-counter and the 3rd precise regulation circuit are the pulse width control part, produce take described periodic signal as the cycle, pulse delay value and pulse width satisfy and set the baseband signal that requires.
Alternatively, described external circuit comprises the first pulse shaping circuit and the second pulse shaping circuit, the first pulse shaping circuit receives the baseband signal of described the first precise regulation circuit output, and paired pulses is sent described the first baseband signal by the first coaxial fitting after characteristic is carried out Shape correction; The second pulse shaping circuit receives the baseband signal of described the 3rd precise regulation circuit output, and paired pulses is sent described the second baseband signal by the second coaxial fitting after characteristic is carried out Shape correction.
Alternatively, described narrow pulse modulator comprises rf inputs mouth, radio frequency output port and pulse input end mouth, microwave signal is by the input of rf inputs mouth and from radio frequency output port output, and the pulsed base band signal is modulated to microwave signal by the input of pulse input end mouth with the pulsed base band signal.
Alternatively, described narrow pulse modulator comprises microwave part and driving circuit section, connects by feedthrough capacitor between the two.
Alternatively, the microwave of described narrow pulse modulator partly comprises the single-pole double-throw switch (SPDT) of microwave FET form, and wherein, 1 pin is the radio frequency input pin; 2 pin are output 1, are used for radio frequency output; 3 pin are for output 2, by build-out resistor ground connection.
Alternatively, the driving circuit section of described narrow pulse modulator comprises high-speed comparator and three road high-speed-differential amplifiers, high-speed comparator receives the switch on and off gating pulse of Transistor-Transistor Logic level, pulse signal is carried out Shape correction and improves driving force, pulse signal after the processing is divided into 3 the tunnel and delivers to respectively three road high-speed-differential amplifiers, and the high-speed-differential amplifier realizes that the conversion of signal single-ended-to-difference realizes the control to microwave switch afterwards.
Alternatively, the positive and negative end of described single-pole double-throw switch (SPDT) is the control port of switch, and this port is by being connected to the output terminal of described high-speed-differential amplifier to ground matching capacitance and feedthrough capacitor.
The invention has the beneficial effects as follows:
(1) the gate ability is strong: because gating circuit is advanced to Microwave Path by intermediate frequency path, avoided the restriction of intermediate-frequency bandwidth to the burst pulse ability, the burst pulse ability can be risen to 8ns by the 16.7ns of intermediate frequency gating technology, thereby realize that stronger interference removes ability;
(2) gate resolution is high: adopted the high precision delay technique based on FPGA, gate resolution can have been brought up to 0.1ns, so that the setting of radio frequency door position is more accurate;
(3) gate is effective: guaranteed to be better than the pulse switch ratio of 70dB based on the radio frequency narrow pulse modulator design proposal of the series connection of 3 grades of switches and distributed type of drive, outstanding gate effect can be provided;
(4) volume structure is small and exquisite, applying flexible: adopt microwave narrow pulse modulator module to cooperate the pulse base band based on FPGA to produce circuit realization radio frequency time domain gate technique, have that volume is small and exquisite, version characteristics independently, under the prerequisite that does not change traditional width of cloth phase transceiver version and working method, only needing increases the present invention in Microwave Path, can realize the application of radio frequency time domain door.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the time domain distribution plan of each main echo of receiving under the typical Compact Range test environment;
Fig. 2 is the synoptic diagram that circuit is removed in the noise jamming of intermediate frequency door;
Fig. 3 is the control block diagram that the present invention is based on the radio frequency hardware time domain gate circuit of narrow pulse modulator;
Fig. 4 is the circuit block diagram of multiplex pulse baseband signal generation module among Fig. 3;
Fig. 5 is pulse baseband signal waveform synoptic diagram among Fig. 3;
Fig. 6 is the circuit block diagram of narrow pulse modulator among Fig. 3;
Fig. 7 is the echo time domain design sketch after the radio frequency hardware time domain gate circuit that the present invention is based on narrow pulse modulator is processed.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The invention discloses a kind of radio frequency hardware time domain gate circuit based on narrow pulse modulator, in the RCS test process, the reflection of reflection, turntable and the Metal pylon of dual-mode antenna coupling, place environment, the various reflected signals such as impact of multipath reflection are all along with the reflected signal of target arrives receiver, because it is different that these reflected signals arrive the moment of receivers, therefore can utilize the time domain gate technique to come the unwanted time-domain signal of filtering and only keep target echo.The present invention increases the narrow microwave pulse modulator by the microwave channel front end at receiving cable, the gate controlled switch position is changed to Microwave Path by intermediate frequency path, can eliminate limit bandwidth, greatly improve the burst pulse ability, ability is removed in the more high-precision noise jamming of final realization.
Fig. 3 is the whole control block diagram of a kind of radio frequency hardware time domain gate circuit based on narrow pulse modulator of the present invention, specifically describe as follows: whole embodiment is finished in an integrated width of cloth Phase Receiver equipment, has increased radio frequency hardware time domain gate circuit 20 as shown in Figure 3 in the integrated width of cloth phase of tradition transceiver.Radio-frequency signal source 1 produces continuous wave signal, this signal is delivered to the switch module of the first narrow pulse modulator 2, while multiplex pulse baseband signal generation module 7 generation pulsewidths, the narrow pulse signal that the cycle is adjustable, i.e. the first baseband signal 11, the first narrow pulse modulator 2 is modulated, obtain pulse-modulated signal, and send by complete machine emission port 3; The echoed signal that receives is sent into receiver by complete machine receiving port 4, after amplifying, amplifier 5 is admitted to the radio frequency door that is consisted of by the second narrow pulse modulator 22, multiplex pulse baseband signal generation module 7 generations this moment the second baseband signal 12, the second baseband signal 12 is take the first baseband signal 11 as benchmark, generate through delay operation, pulsewidth is accurately adjustable, the break-make that this signal is controlled the second narrow pulse modulator 22 as gate-control signal constantly realizes only keeping the target area signal and the purpose of filtering interference signals; Signal behind the second narrow pulse modulator 22 time-domain filterings is admitted to frequency mixer 6, carry out mixing with local oscillation signal 8, obtain intermediate-freuqncy signal, this signal is sent into behind intermediate frequency filtering in the adc circuit 9 and is quantized and Digital IF Processing, can obtain the information of target to be measured, finish test processes work.
Figure 4 shows that the realization block diagram of multiplex pulse baseband signal generation module among Fig. 3, utilize the dirigibility of FPGA internal build counter and the height time-delay resolution characteristics of precision time delay unit, can produce accurately controlled multiplex pulse baseband signal of cycle, pulsewidth and time-delay.In Fig. 4, multiplex pulse baseband signal generation module comprises FPGA circuit 701 and 702 two parts of external circuit, FPGA circuit 701 parts are finished the major functions such as the counting of baseband signal cycle, pulsewidth and minute adjustment, and the generation baseband signal, the external circuit 702 main Shape corrections of realizing the pulse edge characteristic.Clock module 708 produces the clock signal of 200MHz, and this signal provides public reference clock for all counters and precise regulation circuit; The first counter 703 is period counter, and this counter produces periodic signal START according to the PRT of default, and this signal is as the enabling signal of back two-way pulse; Requirement according to system's the first baseband signal 11 pulse widths, the second counter 704 and the first precise regulation circuit 705 cooperatively interact, generation take START as the cycle, the baseband signal that satisfy to set requires of pulse width, and send by the first coaxial fitting 713 through outside the first pulse shaping circuit 711, produce the first baseband signal 11; The 3rd counter 706, the second precise regulation circuit 707, four-counter 709 and the 3rd precise regulation circuit 710 cooperate jointly, wherein the 3rd counter 710 and the second precise regulation circuit 707 are the time-delay control section, four-counter 709 and the 3rd precise regulation circuit 710 are the pulse width control part, finally produce take periodic signal START as the cycle, pulse delay value and pulse width satisfy sets the baseband signal that requires, outside the second pulse shaping circuit 712 is sent by the second coaxial fitting 714, produces the second baseband signal 12.
The first baseband signal that multiplex pulse baseband signal generation module produces and the second baseband signal are respectively applied to source pulsed modulation and the modulation of radio frequency door.The mutual relationship signal as shown in Figure 5 between two paths of signals, the first baseband signal 11 has identical cycle T with the second baseband signal 12, t1 is the pulse width of the first baseband signal 11, t2 is the pulse width of the second baseband signal 12, and τ is that the second baseband signal 12 pulsion phases are for the time-delay of the first baseband signal 11.In order to realize flexibly receiving gate control, gate delay τ, gate-width degree t2 are adjustable arbitrarily according to the requirement of target echo.Advantage based on the multiplex pulse baseband signal generation module of FPGA comprises: volume is small and exquisite, and major function can realize that on a slice FPGA external circuit is simple; Control accuracy is high, owing to utilized the high precision time delay module of FPGA self, therefore can realize very high control accuracy, and module can realize that the periodic regime of 100ns～1ms, minimum 8ns pulse width, pulsewidth and time-delay arrange the indexs such as resolution 0.1ns.
For the first narrow pulse modulator 2 shown in Fig. 3 and the second narrow pulse modulator 22, whole implementation as shown in Figure 6.Narrow pulse modulator comprises microwave part 201 and driving circuit section 202, connects by feedthrough capacitor 205 between the two.In order to improve burst pulse modulation switch ratio, the present invention has taked the version of 3 grades of switch series connection.
As shown in Figure 6, narrow pulse modulator comprises radio frequency input (RF IN) port 209, radio frequency output (RFOUT) port 210 and pulse input (TTL) port 211, microwave signal is by rf inputs mouth 209 inputs of modulator and from radio frequency output port 210 outputs, the pulsed base band signal is modulated to microwave signal by this module with pulsed base band signal (i.e. the first baseband signal or the second baseband signal) and is got on by 211 inputs of pulse input end mouth.Narrow pulse modulator also comprises the single-pole double-throw switch (SPDT) 203 of microwave FET form, and wherein, 1 pin is the radio frequency input pin; 2 pin are output 1, are used for radio frequency output; 3 pin are output 2, and by 50 ohm of build-out resistor 206 ground connection, purpose is when switch is in off state signal to be switched on 50 ohm of matched loads, realize hypersorption, reduce the impact of reflected signal, increase isolation.Positive and negative end shown in Fig. 6 is the control port of switch, and this port is by being connected to the output terminal of high-speed-differential amplifier 207 to ground matching capacitance 204 and feedthrough capacitor 205.In driving circuit section 202, the switch on and off gating pulse of Transistor-Transistor Logic level is sent in the high-speed comparator 208, pulse signal is carried out Shape correction and improves driving force, pulse signal after the processing is divided into 3 the tunnel and delivers to respectively three road high-speed-differential amplifiers 207, and high-speed-differential amplifier 207 realizes that the conversion of signal single-ended-to-difference realizes the control to microwave switch afterwards.In Fig. 6,3 grades of microwave switch circuits have adopted identical version with 3 stage drive circuits, by the form of this distributed driving and in conjunction with 3 grades of constructions of switch, narrow pulse modulator can realize the sampling switch ratio of 70dB and the burst pulse modulation capability of 8ns pulsewidth in the 0.8-40GHz scope.In this module, the advantage of distributed type of drive is: effectively reduce the load capacitance of driver, thereby improve rising, the negative edge characteristic of modulator, and improve the burst pulse ability; Feedthrough capacitor 205 between driving circuit and the switch control end, matching capacitance 204 all are reflected on the load capacitance of driving circuit, and the requirement according to microwave switch in the selection course is implemented.
Utilize above-mentioned hardware circuit, the present invention finally is effective as shown in Figure 7.In Fig. 7, the transponder pulse modulation signal is a narrow pulse signal; Receiving signal is a series of each undesired signal and target echo signals that can distinguish on time domain, comprising: transmitting-receiving leakage signal 15, reflecting surface echoed signal 16, feed echoed signal 17, target echo signal 18 and rear wall reflected signal 19; Utilize accurate gate delay function, by add accurate hardware gate signal at the received RF path, receiving cable is only opened when target echo arrives, thereby reached the purpose that the hardware filtering clutter disturbs.Because adopted based on narrow pulse modulator, in the technology that microwave signal is carried out the gate control of hardware time domain, that therefore radio frequency gate width can be done is very narrow, thereby can realize better echo signal extractability; Owing to adopted the extracting mode of hardware, therefore can not cause the software process errors, have higher precision.
In sum, adopt the radio frequency hardware time domain gate circuit based on narrow pulse modulator of the present invention, by pulse gate parameter rationally is set, can in 0.8～40GHz broadband, realize 8ns minimum gate width, 0.1ns gate resolution and be better than the gate ability of 70dB, can more accurate realize target echoed signal abstraction function.
Radio frequency hardware time domain gate circuit based on narrow pulse modulator of the present invention has the following advantages:
(1) the gate ability is strong: because gating circuit is advanced to Microwave Path by intermediate frequency path, avoided the restriction of intermediate-frequency bandwidth to the burst pulse ability, the burst pulse ability can be risen to 8ns by the 16.7ns of intermediate frequency gating technology, thereby realize that stronger interference removes ability;
(2) gate resolution is high: adopted the high precision delay technique based on FPGA, gate resolution can have been brought up to 0.1ns, so that the setting of radio frequency door position is more accurate;
(3) gate is effective: guaranteed to be better than the pulse switch ratio of 70dB based on the radio frequency narrow pulse modulator design proposal of the series connection of 3 grades of switches and distributed type of drive, outstanding gate effect can be provided;
(4) volume structure is small and exquisite, applying flexible: adopt microwave narrow pulse modulator module to cooperate the pulse base band based on FPGA to produce circuit realization radio frequency time domain gate technique, have that volume is small and exquisite, version characteristics independently, under the prerequisite that does not change traditional width of cloth phase transceiver version and working method, only needing increases the present invention in Microwave Path, can realize the application of radio frequency time domain door.
The present invention has better burst pulse and time domain resolution character, and more excellent time domain hardware filtering effect is provided, and has good value for applications in RCS field tests such as internal field, outfields.This patent also can be extended in the antenna measurement process simultaneously, is used for solving the undesirable problem to the antenna measurement Accuracy of test site condition.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the radio frequency hardware time domain gate circuit based on narrow pulse modulator is characterized in that, comprising:
Multiplex pulse baseband signal generation module produces the first baseband signal and the second baseband signal, and the second baseband signal is take the first baseband signal as benchmark, through the time-delay generation;
The first narrow pulse modulator, the continuous wave signal that the received RF signal source produces is modulated by described the first baseband signal, exports pulse-modulated signal, and sends by the complete machine emission port;
The second narrow pulse modulator receives the echoed signal through amplifying, and its break-make is constantly by described the second baseband signal control, export target regional signal.
2. the radio frequency hardware time domain gate circuit based on narrow pulse modulator as claimed in claim 1, it is characterized in that, described multiplex pulse baseband signal generation module comprises FPGA circuit and external circuit, the FPGA circuit is finished counting and the minute adjustment of baseband signal cycle, pulsewidth, and the generation baseband signal, external circuit is finished the Shape correction of pulse edge characteristic.
3. the radio frequency hardware time domain gate circuit based on narrow pulse modulator as claimed in claim 2 is characterized in that described FPGA circuit comprises: clock module, for all counters and precise regulation circuit provide public reference clock; The first counter, this counter are period counter, and according to the PRT generation periodic signal of default, this periodic signal is as the enabling signal of back two-way pulse; The second counter and the first precise regulation circuit, the baseband signal that produce take described periodic signal as the cycle, pulse width satisfies the setting requirement; The 3rd counter, the second precise regulation circuit, four-counter and the 3rd precise regulation circuit, wherein the 3rd counter and the second precise regulation circuit are the time-delay control section, four-counter and the 3rd precise regulation circuit are the pulse width control part, produce take described periodic signal as the cycle, pulse delay value and pulse width satisfy and set the baseband signal that requires.
4. the radio frequency hardware time domain gate circuit based on narrow pulse modulator as claimed in claim 3, it is characterized in that, described external circuit comprises the first pulse shaping circuit and the second pulse shaping circuit, the first pulse shaping circuit receives the baseband signal of described the first precise regulation circuit output, and paired pulses is sent described the first baseband signal by the first coaxial fitting after characteristic is carried out Shape correction; The second pulse shaping circuit receives the baseband signal of described the 3rd precise regulation circuit output, and paired pulses is sent described the second baseband signal by the second coaxial fitting after characteristic is carried out Shape correction.
5. the radio frequency hardware time domain gate circuit based on narrow pulse modulator as claimed in claim 1, it is characterized in that, described narrow pulse modulator comprises rf inputs mouth, radio frequency output port and pulse input end mouth, microwave signal is exported by the input of rf inputs mouth and from radio frequency output port, the pulsed base band signal is modulated to microwave signal by the input of pulse input end mouth with the pulsed base band signal.
6. the radio frequency hardware time domain gate circuit based on narrow pulse modulator as claimed in claim 5 is characterized in that, described narrow pulse modulator comprises microwave part and driving circuit section, connects by feedthrough capacitor between the two.
7. the radio frequency hardware time domain gate circuit based on narrow pulse modulator as claimed in claim 6 is characterized in that the microwave of described narrow pulse modulator partly comprises the single-pole double-throw switch (SPDT) of microwave FET form, and wherein, 1 pin is the radio frequency input pin; 2 pin are output 1, are used for radio frequency output; 3 pin are for output 2, by build-out resistor ground connection.
8. the radio frequency hardware time domain gate circuit based on narrow pulse modulator as claimed in claim 7, it is characterized in that, the driving circuit section of described narrow pulse modulator comprises high-speed comparator and three road high-speed-differential amplifiers, high-speed comparator receives the switch on and off gating pulse of Transistor-Transistor Logic level, pulse signal is carried out Shape correction and improves driving force, pulse signal after the processing is divided into 3 the tunnel and delivers to respectively three road high-speed-differential amplifiers, and the high-speed-differential amplifier realizes that the conversion of signal single-ended-to-difference realizes the control to microwave switch afterwards.
9. the radio frequency hardware time domain gate circuit based on narrow pulse modulator as claimed in claim 8, it is characterized in that, the positive and negative end of described single-pole double-throw switch (SPDT) is the control port of switch, and this port is by being connected to the output terminal of described high-speed-differential amplifier to ground matching capacitance and feedthrough capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210576157.XA CN103018731B (en) | 2012-12-27 | 2012-12-27 | A kind of RF hardware time domain gate circuit based on narrow pulse modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210576157.XA CN103018731B (en) | 2012-12-27 | 2012-12-27 | A kind of RF hardware time domain gate circuit based on narrow pulse modulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103018731A true CN103018731A (en) | 2013-04-03 |
| CN103018731B CN103018731B (en) | 2015-11-25 |
Family
ID=47967548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210576157.XA Active CN103018731B (en) | 2012-12-27 | 2012-12-27 | A kind of RF hardware time domain gate circuit based on narrow pulse modulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103018731B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248384A (en) * | 2013-05-20 | 2013-08-14 | 中国电子科技集团公司第四十一研究所 | Antenna test method and antenna test system based on wireless pulse technology |
| CN103308898A (en) * | 2013-05-20 | 2013-09-18 | 中国电子科技集团公司第四十一研究所 | Single-station pulse RCS (Radar Cross Section) testing system based on switch shifting |
| CN104819685A (en) * | 2015-04-29 | 2015-08-05 | 长安大学 | Landslide monitoring device based on TDR technology and landslide monitoring method thereof |
| CN106027002A (en) * | 2016-05-17 | 2016-10-12 | 电子科技大学 | Nanosecond microwave narrow pulse modulator |
| CN109459733A (en) * | 2018-10-26 | 2019-03-12 | 中电科仪器仪表有限公司 | Anticollision Radar target velocity simulator, system and method based on pm mode |
| CN113824433A (en) * | 2021-08-26 | 2021-12-21 | 电子科技大学 | Pulse modulator based on Schottky diode cascade connection |
| CN113985681A (en) * | 2021-10-28 | 2022-01-28 | 中国科学院声学研究所南海研究站 | Time domain cloaking switch based on light intensity modulator and time domain cloaking device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269645A (en) * | 1999-04-05 | 2000-10-11 | 深圳市中兴通讯股份有限公司 | Analog and data interface device for light synchronizing digital transmission equipment |
| CN101534183A (en) * | 2009-04-10 | 2009-09-16 | 华南理工大学 | Real-time configurable digital correlator based on FPGA |
| US8144050B1 (en) * | 2009-02-11 | 2012-03-27 | The Boeing Company | Removing clutter from radar cross section measurements using spectral tagging |
-
2012
- 2012-12-27 CN CN201210576157.XA patent/CN103018731B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269645A (en) * | 1999-04-05 | 2000-10-11 | 深圳市中兴通讯股份有限公司 | Analog and data interface device for light synchronizing digital transmission equipment |
| US8144050B1 (en) * | 2009-02-11 | 2012-03-27 | The Boeing Company | Removing clutter from radar cross section measurements using spectral tagging |
| CN101534183A (en) * | 2009-04-10 | 2009-09-16 | 华南理工大学 | Real-time configurable digital correlator based on FPGA |
Non-Patent Citations (1)
| Title |
|---|
| 王亚海等: "硬件门技术在雷达散射截面测试中的应用", 《电子测量与仪器学报》, 30 April 2010 (2010-04-30), pages 192 - 195 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248384A (en) * | 2013-05-20 | 2013-08-14 | 中国电子科技集团公司第四十一研究所 | Antenna test method and antenna test system based on wireless pulse technology |
| CN103308898A (en) * | 2013-05-20 | 2013-09-18 | 中国电子科技集团公司第四十一研究所 | Single-station pulse RCS (Radar Cross Section) testing system based on switch shifting |
| CN103248384B (en) * | 2013-05-20 | 2015-06-17 | 中国电子科技集团公司第四十一研究所 | Antenna test method and antenna test system based on wireless pulse technology |
| CN104819685A (en) * | 2015-04-29 | 2015-08-05 | 长安大学 | Landslide monitoring device based on TDR technology and landslide monitoring method thereof |
| CN106027002A (en) * | 2016-05-17 | 2016-10-12 | 电子科技大学 | Nanosecond microwave narrow pulse modulator |
| CN106027002B (en) * | 2016-05-17 | 2019-06-21 | 电子科技大学 | A kind of nanosecond microwave narrow pulse modulator |
| CN109459733A (en) * | 2018-10-26 | 2019-03-12 | 中电科仪器仪表有限公司 | Anticollision Radar target velocity simulator, system and method based on pm mode |
| CN109459733B (en) * | 2018-10-26 | 2021-01-22 | 中电科仪器仪表有限公司 | Anti-collision radar target speed simulation device, system and method based on phase modulation mode |
| CN113824433A (en) * | 2021-08-26 | 2021-12-21 | 电子科技大学 | Pulse modulator based on Schottky diode cascade connection |
| CN113824433B (en) * | 2021-08-26 | 2023-08-25 | 电子科技大学 | Pulse modulator based on schottky diode cascade |
| CN113985681A (en) * | 2021-10-28 | 2022-01-28 | 中国科学院声学研究所南海研究站 | Time domain cloaking switch based on light intensity modulator and time domain cloaking device |
| CN113985681B (en) * | 2021-10-28 | 2024-02-27 | 中国科学院声学研究所南海研究站 | Time domain stealth switch and time domain stealth device based on light intensity modulator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103018731B (en) | 2015-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103018731A (en) | Radio-frequency hardware time domain gate circuit based on narrow-pulse modulators | |
| US8085181B2 (en) | Polarization-modulated transmitter for a weather radar | |
| KR101809371B1 (en) | RadCom System and Method using a Fast Chirp Signal for Vehicle | |
| CN111183741B (en) | Broadband radar target simulation method and system | |
| Goppelt et al. | Automotive radar–investigation of mutual interference mechanisms | |
| CN103675780B (en) | A kind of radar simulator for the full coherent of Ku wave band | |
| Boukeffa et al. | Sidelobe reduction with nonlinear frequency modulated waveforms | |
| WO2006041041A1 (en) | Compact-size, low-power-consumption, short-pulse radar and its control method | |
| JP4460056B2 (en) | Transceiver | |
| CN111537969B (en) | Broadband instantaneous frequency measuring and tracking device | |
| CN107085201B (en) | Receiving and transmitting integrated Doppler radar front-end module | |
| Frankford et al. | Software-defined radar for MIMO and adaptive waveform applications | |
| CN107045148A (en) | A kind of GPR | |
| George et al. | Implementation of blind zone and range-velocity ambiguity mitigation for solid-state weather radar | |
| CN112985540B (en) | Split type guided wave radar level gauge based on gated frequency modulated continuous wave | |
| Intyas et al. | Improvement of radar performance using LFM pulse compression technique | |
| Pfeffer et al. | A software defined radar platform for mm-wave sensing applications | |
| Baskar et al. | A software defined radar platform for waveform adaptive MIMO radar research | |
| Yuehong et al. | Research on carrier leakage cancellation technology of FMCW system | |
| CN111413677B (en) | Difference frequency-delay type receiving and transmitting clock synchronization method, circuit and ultra-wideband pulse radar receiving device | |
| CN104569925A (en) | Multi-functional wideband receiving and transmitting channel | |
| CN210775831U (en) | Radar apparatus | |
| CN101540596B (en) | Picosecond impulse generator based on coplanar waveguide | |
| CN210075198U (en) | Ka frequency band broadband linear frequency sweep source | |
| Laghezza et al. | Photonic based marine radar demonstrator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: No. 726 Changzheng Road, Bengbu, Anhui Province Patentee after: The 41st Institute of CETC Address before: 266000 Qingdao economic and Technological Development Zone, Shandong Xiangjiang Road, No. 98 Patentee before: The 41st Institute of CETC |
|
| CP02 | Change in the address of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190315 Address after: 266000 No. 98 Xiangjiang Road, Huangdao District, Qingdao City, Shandong Province Patentee after: China Electronics Technology Instrument and Meter Co., Ltd. Address before: No. 726 Changzheng Road, Bengbu, Anhui Province Patentee before: The 41st Institute of CETC |
|
| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: Huangdao Xiangjiang Road 266555 Shandong city of Qingdao Province, No. 98 Patentee after: CLP kesiyi Technology Co.,Ltd. Address before: 266000 No. 98 Xiangjiang Road, Huangdao District, Shandong, Qingdao Patentee before: CHINA ELECTRONIC TECHNOLOGY INSTRUMENTS Co.,Ltd. |
|
| CP03 | Change of name, title or address |