CN2449243Y - High-frequency groundwave radar wide frequency band receiving/transmitting switch - Google Patents

High-frequency groundwave radar wide frequency band receiving/transmitting switch Download PDF

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CN2449243Y
CN2449243Y CN 00232197 CN00232197U CN2449243Y CN 2449243 Y CN2449243 Y CN 2449243Y CN 00232197 CN00232197 CN 00232197 CN 00232197 U CN00232197 U CN 00232197U CN 2449243 Y CN2449243 Y CN 2449243Y
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pulse
transmitting
receiving
transmit
receive switch
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杨子杰
吴世才
石振华
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Wuhan University WHU
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Wuhan University WHU
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Abstract

The utility model discloses a wide frequency band receiving/transmitting switch for a high-frequency radar. PIN diodes form a main circuit of the switch, which is divided into a transmitting branch and a receiving branch, and all the branches are not provided with a resonant tank. Triodes used for complementing the polarity of MC1488, MC1489, NPN and PNP for an integrated circuit form a control pulse forming circuit is powered by a high stability Linear regulated supply. Thus, a control pulse with double time width and bipolarity can be generated in centralization. Main circuits of eight receiving/transmitting switches can be simultaneously controlled in parallel, wherein, a receiving/transmitting pulse +TR can control a PIN diode D1 of the transmitting branch, a high level receiving/transmitting pulse +TR (H) can control a high counter voltage PIN diode D2 of the receiving branch, a low level receiving/transmitting pulse +TR can control D3, D4 and D5 of the receiving branch, and a ground wave voltage pulse +TB can control other PIN diodes of the receiving branch.

Description

High-frequency ground wave radar broadband transmit-receive switch
The utility model relates to a kind of radar transmit-receive switch, particularly a kind of high-frequency ground wave radar broadband transmit-receive switch of forming with PIN diode.
Be used for surveying ocean surface dynamic factors and sea moving target, the remote high-frequency ground wave radar generally adopts phased array antenna, because this radar frequency of operation is very low, in order to obtain high sensitivity and high precision, antenna aperture may reach hundreds of rice even thousands of rice, and seeking by the sea to provide the suitable area of building this radar station absolutely not easy.If adopt transmit-receive switch to make one pair of antenna shared for transmitting and receiving, will make to take up an area of to significantly reduce, save the construction and the maintenance cost of antenna in a large number, thereby increased the possibility that this radar is widely used.Yet, be total in the radar system at station in emission and reception, high-power transmitting in the very strong near-field signals of the local formation of radar station, this signal that often is called as " earthwave " can make receiver transship, thus the impossible normal echo that receives.In the radar system that adopts the dual-mode antenna common technology, this ground wave interference is even more serious, must add to press ground wave impulse (Blank Pulse) in transmit-receive switch, suppresses the interference of earthwave to receiver during launching in some way effectively.High-frequency ground wave radar GWR (the communication synthesis research institute quarterly report of Japan's development, shortwave ocean レ-, Vol.37, No.3,1991:343～437) be exactly to adopt transmit-receive switch to make one pair of double 8 yuan of phased array antenna transmit-receive sharing, its weak point is that this transmit-receive switch is a mode of resonance, and working band is too narrow, can not satisfy the requirement of broadband higher-frequency radar.Document PIN Diode Transmit/Receive Switch for 80-10Meters (Ham Radio, May 1976, p:10-15) transmit-receive switch of Jie Shaoing, can be operated in very wide frequency band, but because gating pulse circuit and power supply characteristic are very poor, be suitable for short-wave radio set and manually report occasion, adopt linear frequency modulation to interrupt the hf doppler radar of continuous wave (FMICW) if be used for controlling, gating pulse the interference that can not effectively suppress to transmit to receiver, and because the instability of power supply, the take over period gating pulse can be flooded useful radar echo signal to the additional interference of modulated process generation of echoed signal, and the radar system of conversion can't operate as normal fast between transmitter and receiver to make this phased array antenna.
In order to overcome the deficiency of above-mentioned all kinds of transmit-receive switch, the purpose of this utility model is to provide a kind of high-frequency ground wave radar broadband transmit-receive switch, simple in structure, the good characteristics of control characteristic that this transmit-receive switch should have are applicable to and adopt linear frequency modulation to interrupt the transmit-receive switch device of the broadband higher-frequency radar of continuous wave.
For achieving the above object, technical solution adopted in the utility model is as follows:
A kind of high-frequency ground wave radar broadband transmit-receive switch comprises that transmit-receive switch main circuit and gating pulse form circuit two parts, all adopts the linear power supply of high stability, and each group power supply all has good isolation circuit.The transmit-receive switch main circuit is divided into the transmitting branch that contains PIN diode D1 and contains the receiving branch of PIN diode D2～D7.Transmitting branch D1 is connected into the tandem type switch, and receiving branch D2, D3 are connected into the tandem type switch, and D34, D5 and D6, D7 are connected into the bypass type switch.T and transmitter output terminal join, and R and receiver inlet join, and A and antenna join.This circuit does not contain resonant tank, thereby is suitable in whole high band operation.Capacitor C 1, C2 and L1 form Hi-pass filter, and C2～C7 is a high-frequency coupling electric capacity, and C8～C12 is a high-frequency bypass capacitor.The impedance of inductance L 2～L6 is far above antenna load impedance.By B 1Add bipolarity transmitting-receiving control penetrate pulse+TR (emission phase+12V, the take over period-12V), B 2Adding bipolarity high level transmitting-receiving gating pulse+TR (H) (emission phase+240V, the take over period-12V), B 3Adding bipolarity pressure ground wave impulse+TB (emission phase+12V, the take over period-12V).The time width of positive pulse+TR (H) and+TB is identical, but different with transponder pulse+TP, its forward position with+Δ t is in advance compared in the TP forward position 1, thereafter behind the hysteresis+TP along Δ t 2, and the TB forward position is identical with TR, the back is back along Δ t along hysteresis TR's 3, as shown in Figure 3.
In the emission phase, by B 1Add+the TP pulse is+12V to make D 1Safe operation under specified input radio frequency power, the while is D only 4, D 5Conducting, D 3End.And by B 2Add+TR (H) pulse is+240V to make D 2Instead end partially, by B 3Add+the TB pulse is+12V to make D 6, D 7The positively biased conducting, R 1, R 4, R 5, R 6And R 7Control their positive bias size respectively.So antenna A and transmitter are connected, and disconnect with receiver R.In the take over period, by B 1Add+the TR pulse is-12V to make D 1Instead end partially, so antenna A and transmitter T disconnect.Meanwhile, by B 2Add+TR pulse and B 3The TB pulse that adds is-12V to make D 4, D 5And D 6, D 7Instead end partially, make D simultaneously 2, D 3The positively biased conducting, R 2, R 5And R 6Control D 2, D 3The positive bias size is so antenna A connects with reception R.
This transmit-receive switch pulse shaping circuit mainly by the remote data transmission IC of standard to the triode of MC1488 and MC1489 and NPN and the complementation of PNP polarity to forming, produce not wide simultaneously, ambipolar gating pulse.Signal TP, TR that produces by synchronization control circuit in the radar host computer and TB through MC1488 be transformed into negative logic (± 12V) MC1489 of signal in transmit-receive switch is transformed into Transistor-Transistor Logic level.Wherein TR and TB promote MC1488 again and revert to again ± 12V.By the transmitting-receiving gating pulse TR of U1A1 pin input (± 12V) become the Transistor-Transistor Logic level negative pulse at its output terminal 3 pin, revert to ± the 12V pulse through behind the U2A.Control two kinds of pulse shapings subsequently, the one tunnel through current-limiting resistance R 12Be added to the Q of polarity complementation 3, Q 4Base stage, emission phase positive pulse makes Q 3Saturated, Q 4End.Because Q 3Saturated ,+240V power supply is through R 13, R 14Dividing potential drop makes Q 5Base voltage suitably is lower than emitter voltage, makes Q 5Saturated, its collector voltage is+240V; Simultaneously because Q 4End R 16Make Q 6Base stage and emitter equipotential, Q 6End.The take over period negative pulse makes Q 3By, Q 4Saturated.Because Q 3End R 14Make Q 3Radix and emitter equipotential, Q 5End; Because Q 4Saturated ,-12V power supply is through R 15, R 16Dividing potential drop makes Q 6Base voltage suitably is higher than emitter voltage, makes Q 6Saturated, two pipe collector voltages become-12V.So at Q 5, Q 6Collector obtains the emission phase for+240V, the take over period bipolar pulse+TR (H) for-12V, by protective resistance R 17And B 2Be the high back-pressure PIN diode of transmit-receive switch receiving branch D 2Bias voltage is provided.Another road of U2B6 pin output pulse adds to the triode of polarity complementation to Q 1, Q 2Base stage, emission phase positive pulse makes Q 1Saturated, Q 2End, two pipe emitter voltages are+12V; The take over period negative pulse makes Q 1By, Q 2Saturated, two pipe emitter voltages are-12V that this bipolar pulse+TR is by protective resistance R 11Be connected to transmit-receive switch with the B1 point.By the pressure ground wave impulse TB of U1B4 pin input (± 12V) become the Transistor-Transistor Logic level negative pulse at its output terminal 6 pin, revert to through behind the U2B ± pulse of 12V, emission phase positive pulse makes Q 7Saturated, Q 8End, two pipe emitter voltages are+12V; The take over period negative pulse makes Q 7By, Q 8Saturated, two manage emitter voltages is-12V, then obtain ambipolar pressure ground wave impulse+TB, by protective resistance R 18And B 3Point is transmit-receive switch receiving branch PIN diode D 6, D 7Bias voltage is provided.In addition, transponder pulse TP is from the input of U1C10 pin, and 8 pin output Transistor-Transistor Logic level negative pulse through phase inverter U3A output Transistor-Transistor Logic level positive pulse, is added to the pin with door U4A1.The TR negative pulse of U1A3 pin output through phase inverter U3B output TTL positive pulse, is added to the pin with door U4A2, and Xiang Yuhou is from U4A3 pin output Transistor-Transistor Logic level TP pulse.With this pulse go to control transmitter last what, form the high-power high-frequency transponder pulse.
The transmit-receive switch that the utility model provides makes common antenna not only do emission but also receive, the main circuit that is characterized in adopting PIN diode to constitute does not contain resonant tank, thereby to be applied to working band be that vertical with ionosphere and the oblique detection instrument that returns of higher-frequency radar of 3-30MHz is as the broadband transmit-receive switch.This transmit-receive switch is by the pulse of dual-time width control: first three level of transmitting branch and receiving branch is by transmitting-receiving gating pulse+TR control, and the receiving branch afterbody is by pressing ground wave impulse+TB control, because transmitting-receiving gating pulse TR shifts to an earlier date Δ t than transponder pulse TP forward position 1, the back is along hysteresis Δ t 2, thereby make transmitting branch carry out the control model of " open the door earlier and afterwards close the door " to the high-frequency emission pulse, guaranteed control to the high-power high-frequency pulse.Press the earthwave pulse front edge to shift to an earlier date Δ t than transponder pulse 1, the back along than behind the TR along hysteresis Δ t 3, effectively suppress high-frequency emission smear and transmitting-receiving gating pulse TR at control D 2And D 3The time transient response that produces.Two kinds of gating pulse all are ambipolar (the emission phase are a positive pulse, and the take over period is a negative pulse), have increased the PIN diode reverse recovery current, thereby have quickened turn off process, have increased the isolation of off state.High back-pressure PIN diode D 2The characteristics of bias circuit are, begin in the emission phase+TB (H) rises, and+240V power supply passes through R 2The D of positively biased conducting 4To C 4Charging is because R 2Very little (600 Ω), charging rate is very little, makes+TB (H) positive pulse forward position very steep, has improved D 2Control; In the take over period, D 4, D 5Instead end R partially 3C is provided 4Discharge loop.Receiving branch D 2Adopt the high back-pressure PIN diode of high-quality, increased the reliability of transmit-receive switch; And D 1～D 7Adopt little electric current, low back-pressure PIN diode, reduced cost.Adopt D 4, D 5And D 6, D 7The control mode of this paired access becomes ground connection in parallel to high-frequency signal during their positively biased conductings, and the very little cost of flower just makes each grade isolation increase 6dB than single tube control, and pressure ground wave impulse is reduced greatly at the transition impulse that receiving branch causes.
The characteristics of this transmit-receive switch pulse shaping circuit are to utilize MC1489 and MC1488 and wide, bipolarity gating pulse when being formed pair concentrating by the triode of PNP and the complementation of NPN polarity, Parallel Control eight way switch simultaneously, simplified circuit greatly, improved power-efficient, and pulse waveform has very steep forward position.Pulsing circuit recovers input bipolarity gating pulse with a pair of integrated circuit U1 (1489) and U2 (1488), eliminated the transponder pulse TP that sends into by long-range, receive and dispatch decay and the distortion of gating pulse TR and pressure ground wave impulse TB, increased the accuracy and the reliability of control circuit.The Technitron Q of mid power polarity complementation 1And Q 2, Q 7And Q 8Be connected into the emitter-base bandgap grading output form, form the bipolar pulse of two-way low level very easily.The characteristics that the high level gating pulse forms circuit are, 4 triodes all are high back-pressures, constitute the collector output form of polarity complementation in twos, at Q 3(or Q 4) during saturation conduction, R 13, R 14(or R 15, R 16) voltage divider formed makes Q 5(or Q 6) base stage obtain suitable voltage and saturation conduction makes Q 5(or Q 6) collector voltage is+240V (or-12V), thus obtaining the emission phase is+240V, the take over period high level transmitting-receiving gating pulse+TR (H) for-12V.Three impulse output circuits seal in resistance R respectively 11, R 17, R 18, they are respectively the parts of biasing resistance in the corresponding PIN diode biasing circuit, when the accidental shorted to earth of external circuit, these resistance shield to output triode respectively.
The utility model transmit-receive switch pulse shaping circuit is all powered with the linear power supply of high stability, each group power supply all is connected to good isolation circuit, make the phase place and the amplitude of gating pulse very stable, avoided the additional interference of gating pulse being produced owing to the power supply shakiness in the modulated process of echoed signal.
Fig. 1 is the utility model broadband transmit-receive switch main circuit.
Fig. 2 is that the utility model gating pulse forms circuit.
Fig. 3 is the utility model waveform input signal figure.
Below in conjunction with accompanying drawing and specific embodiments the utility model is described in further detail
A kind of high-frequency ground wave radar broadband transmit-receive switch comprises that transmit-receive switch main circuit and gating pulse form circuit two parts and form, and all adopts the linear power supply of high stability, and each group power supply all has good isolation circuit.The transmit-receive switch main circuit is divided into and contains PIN diode D 1Transmitting branch and contain PIN diode D 2～D 7Receiving branch.Transmitting branch D 1Be connected into the tandem type switch, receiving branch D 2, D 3Be connected into the tandem type switch, D 4, D 5And D 6, D 7Be connected into the bypass type switch.T and transmitter output terminal join, and R and receiver inlet join, and A and antenna join.
It is the transmitting branch of core and with PIN diode D that the described transmit-receive switch main circuit of Fig. 1 is divided into PIN diode D1 1～D 7Be the receiving branch of core, constitute a single-pole double-throw switch (SPDT) in fact, wherein fix a point A and antenna join, and two moving some T and R join with transmitter and receiver respectively.In transmitting branch, D 1Be the high-power PIN diode of UM4001 type, capacitor C 1, C 2Be 1120PF, C 8Be 0.01 μ F, inductance L 1Equal 1.55 μ H, L 2Equal 100 μ H, R 1Be 100 Ω, R 11Be 50 Ω, make D 1Positive bias equals 80mA.In receiving branch, D 2Be the high back-pressure PIN diode of UM4906 type, D 3～D 7Be the little electric current PIN diode of HSMP-382X type.Capacitor C 3～C 7, and C 9～C 12Be 2200pF, inductance L 3～L 6Be equal to 100 μ H.Take over period B2 adds+and TR (H) makes D for-12V 2The positively biased conducting, R 2Be 390 Ω, R 17Be 200 Ω, make D 2Positive bias is 20mA.The emission phase ,+240V power supply is through R 2The D of positively biased conducting 5To C 4Charging, time constant is 6 μ s, the very steep forward position of formation+TR (H) positive pulse.Take over period C 4Pass through R 3Discharge.R 3Be 1.5K Ω, by adjusting R 15Make Q 6Fully saturated, make after the gating pulse along less than 20 μ S.B 3Add+TB launches the phase positive pulse makes D 6And D 7The positively biased conducting, the take over period negative pulse makes D 6And D 7End.R 4, R 5, R 6And R 7Be equal to 1.2K Ω, make D 4～D 7Positive bias equals 5mA.
The high-power linear FM signal of the transmitter output of being sent into by T owing to produced by the transponder pulse control of Fig. 3 (a), always has certain forward position and edge, back shown in Fig. 3 (b), transmitter output neither zero level in the take over period.D 1Also received and dispatched pulse and controlled, had reverse recovery time when anti-inclined to one side, made D 1Can not be at t 2Turn-off rapidly constantly, cause emission delay hangover signal to seal in receiver in the take over period.Transmitting-receiving pulse TR that Fig. 3 (c) illustrates and pressure ground wave impulse TB forward position shift to an earlier date Δ t than transponder pulse TP 1=10 μ s, the back along TR than transponder pulse TP hysteresis Δ t 2=10 μ s press wave impulse TB in ground than transponder pulse TP hysteresis Δ T 3=20 μ s can effectively suppress to seal in the ground wave interference of receiving branch.And gating pulse is ambipolar, has reduced D 1Reverse recovery time, quickened D 1Turn off process, simultaneously owing to reduced D 1Anti-electric capacity partially, thereby increased D 1Isolation, reduced transmitter in the output of take over period interference to receiver.
The utility model transmit-receive switch pulse shaping circuit as shown in Figure 2, by two high stability linear stabilized power supplies provide+240V and+5V, ± 12V power supply.U1 is MC1489; Give the power supply of 14 pin by+5V, add bipolarity transmitting-receiving pulse TR that Fig. 3 describes respectively, press ground wave impulse TB, obtain the Transistor-Transistor Logic level negative pulse of these three kinds of pulses at 3,6 and 8 pin respectively by 1,4 pin and 10 pin.V 2Be MC1488,1 pin connects-12V, and 14 pin connect+the 12V power supply, it output terminal 3 pin and the bipolarity transmitting-receiving pulse that obtains respectively being resumed of 6 pin and press the ground wave impulse.U1C8 pin output negative pole TP sends into and a door U4A1 pin through phase inverter U3A is anti-phase, the negative polarity TR of U1A3 pin output enters the pin with door U4A2 through phase inverter U3B is anti-phase, with the transponder pulse TP of back output cathode Transistor-Transistor Logic level, control transmitter the output of generation high-frequency high-power transponder pulse with this pulse.Have only when having TR and TP simultaneously transmitter and transmit-receive switch just to work, the high-power signal of having avoided transmit-receive switch to be launched machine output because of the TR pulse is undesired damages.At Q 1, Q 3Be NPN type triode 3DK4, Q 2And Q 8For PNP shape triode SB550, at Q 1And Q 2, Q 7And Q 8Emitter export respectively ± bipolarity of 12V transmitting-receiving pulse+TR and press ground wave impulse TB, protective resistance R 11And R 18Be equal to 50 Ω.U 26 pin output pulse is through 100K Ω resistance R 12Control bipolarity high level is pressed the earthwave pulse shaping circuit.Q 3Be NPN type triode KPS42, Q 4Be positive-negative-positive triode KSA92, they are connected into the collector output form.Q 5Be positive-negative-positive triode KSA92, Q 6Be NPN type triode BU406, they all are connected into the collector output form.Q 5By+240V power supply process R 14And R 14, Q 3Dividing potential drop obtains base voltage, Q 6By-12V power supply process R 16And R 15, Q 4Dividing potential drop obtains base voltage.Emission phase positive pulse makes Q 3Saturated, Q 4End.Q 5Because the base voltage step-down is and saturated, its collector voltage is+240V; While Q 6Because of base stage and emitter equipotential are ended.Otherwise the take over period negative pulse makes Q 3By, Q 4Saturated, Q 5Because of base stage and emitter equipotential are ended Q 6Saturated because of the base voltage rising, its collector voltage is-12V, so pressing under the ground wave impulse TB effect Q 5, Q 6The collector output cathode is+240V, and negative polarity is-and the high level bipolarity of 12V presses ground wave impulse+TB (H), through 200 Ω protective resistance R 17Be the high back-pressure PIN diode of transmit-receive switch receiving branch D 2Bias voltage is provided.

Claims (10)

1. high-frequency ground wave radar broadband transmit-receive switch, it is characterized in that: this transmit-receive switch comprises that transmit-receive switch main circuit and gating pulse form circuit, the transmit-receive switch main circuit is divided into the transmitting branch that contains PIN diode D1 and contains the receiving branch of PIN diode D2～D7, transmitting branch D1 is connected into the tandem type switch, receiving branch D2, D3 is connected into the tandem type switch, D4 and D5 and D6 and D7 are connected into the bypass type switch respectively, moving some T and transmitter output terminal join, moving some R and receiver inlet join, moving some A and antenna join, and form the B of circuit to the transmit-receive switch main circuit by gating pulse 1Add bipolarity transmitting-receiving control and penetrate pulse+TR, to the B of transmit-receive switch main circuit 2Add bipolarity high level transmitting-receiving gating pulse+TR (H), to the B of transmit-receive switch main circuit 3Add bipolarity and press ground wave impulse+TB.
2. high-frequency ground wave radar broadband transmit-receive switch according to claim 1, it is characterized in that: transmitting branch C1, C2 and L1 form Hi-pass filter, and inductance adopts high Q air core coil, and electric capacity adopts high Q, withstand voltage ceramic condenser greater than 1000V, high-power to bear.
3. high-frequency ground wave radar broadband transmit-receive switch according to claim 1 is characterized in that: press ground wave impulse TB and transponder pulse TP and transmitting-receiving same cycle of pulse TR, but TB positive pulse forward position is identical with the forward position of TR, but with shift to an earlier date Δ t than the TP edge 1, after the TB positive pulse along than behind the TR along hysteresis Δ t 3, than behind the TP along hysteresis Δ t 2+ Δ t 3, TB, TP and TR are ± the 12V bipolar pulse.
4. high-frequency ground wave radar broadband transmit-receive switch according to claim 2, it is characterized in that: in pulse shaping circuit, transponder pulse TP and pressure ground wave impulse TB and transmitting-receiving pulse TR are transmitted between radar host computer and antenna duplexer MC1488, MC1489 by remote data transmission integrated circuit, and TR and TB revert to bipolar pulse by MC1488 again and control the pulse shaping circuit that the triode of three route PNP, the complementation of NPN polarity is formed respectively then.
5. high-frequency ground wave radar broadband transmit-receive switch according to claim 2 is characterized in that: in pulse shaping circuit, by Q 1, Q 2Produce the bipolarity transmitting-receiving and penetrate pulse+TR, two triodes are NPN type, the complementation of positive-negative-positive polarity, and base stage links to each other, and emitter load each other is connected into emitter output circuit, and resistance in series R in the output circuit 11
6. high-frequency ground wave radar broadband transmit-receive switch according to claim 2 is characterized in that: in pulse shaping circuit, by Q 7, Q 8Produce bipolarity and press ground wave impulse+TB, two triodes are NPN type, the complementation of positive-negative-positive polarity, and base stage links to each other, and emitter load each other is connected into emitter output circuit, and resistance in series R in the output circuit 18
7. high-frequency ground wave radar broadband transmit-receive switch according to claim 2 is characterized in that: in pulse shaping circuit, by Q 3, Q 4, Q 5, Q 6Produce high level bipolarity transmitting-receiving pulse+TR (H), 4 triode two bipolarity complementations are connected into the collector output circuit, NPN type triode Q 3With positive-negative-positive triode Q 4The base stage positive-negative-positive triode Q that links to each other 5With NPN type triode Q 6Collector load each other, Q 3With Q 5The polarity complementation, positive supply is through R 14, R 13Dividing potential drop is Q 5Base bias, D 4With Q 6The polarity complementation, negative supply is through R 16, R 15Dividing potential drop is Q 6Base bias, resistance in series R17 in the output circuit.
8. high-frequency ground wave radar broadband transmit-receive switch according to claim 1 is characterized in that: transmitting branch D 1By bipolarity low level transmitting-receiving pulse+TR control, receiving branch D 2By high level bipolarity transmitting-receiving pulse+TR (H) control, receiving branch D 3, D 4And D 5By bipolarity low level TR pulse control, D 6And D 7Press ground wave impulse+TB control by the bipolarity low level.
9. high-frequency ground wave radar broadband transmit-receive switch according to claim 1 is characterized in that: wide when pulse shaping circuit is concentrated produce two, bipolar pulse while Parallel Control multichannel transmit-receive switch.
10. high-frequency ground wave radar broadband transmit-receive switch according to claim 1 is characterized in that: the transponder pulse TP that controls transmitter is provided with door U4A by transmitting-receiving pulse TR and TP warp.
CN 00232197 2000-10-20 2000-10-20 High-frequency groundwave radar wide frequency band receiving/transmitting switch Expired - Fee Related CN2449243Y (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100521678C (en) * 2005-11-30 2009-07-29 成都同和资讯有限责任公司 Communication interface controller
CN100523863C (en) * 2005-11-04 2009-08-05 武汉大学 Method and circuit for improving dynamic range of high-frequency ground wave radar receiver
CN104181461A (en) * 2014-09-12 2014-12-03 四川九洲电器集团有限责任公司 Fault detection assembly and method for microwave switch
CN106059537A (en) * 2016-06-21 2016-10-26 四川电子军工集团装备技术有限公司 High-power impulse pulse source used in air anti-stealth radar system
CN107294359A (en) * 2017-07-02 2017-10-24 中国航空工业集团公司雷华电子技术研究所 Digital power voltage stabilizing control method for correcting and system based on pulse signal detection

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100523863C (en) * 2005-11-04 2009-08-05 武汉大学 Method and circuit for improving dynamic range of high-frequency ground wave radar receiver
CN100521678C (en) * 2005-11-30 2009-07-29 成都同和资讯有限责任公司 Communication interface controller
CN104181461A (en) * 2014-09-12 2014-12-03 四川九洲电器集团有限责任公司 Fault detection assembly and method for microwave switch
CN104181461B (en) * 2014-09-12 2017-02-22 四川九洲电器集团有限责任公司 Fault detection assembly and method for microwave switch
CN106059537A (en) * 2016-06-21 2016-10-26 四川电子军工集团装备技术有限公司 High-power impulse pulse source used in air anti-stealth radar system
CN107294359A (en) * 2017-07-02 2017-10-24 中国航空工业集团公司雷华电子技术研究所 Digital power voltage stabilizing control method for correcting and system based on pulse signal detection
CN107294359B (en) * 2017-07-02 2019-08-30 中国航空工业集团公司雷华电子技术研究所 Digital power pressure stabilizing control method for correcting based on pulse signal detection

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