CN202049233U - Digital phase patching receiving system for improving permatron radar improvement factors - Google Patents
Digital phase patching receiving system for improving permatron radar improvement factors Download PDFInfo
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- CN202049233U CN202049233U CN201120140350XU CN201120140350U CN202049233U CN 202049233 U CN202049233 U CN 202049233U CN 201120140350X U CN201120140350X U CN 201120140350XU CN 201120140350 U CN201120140350 U CN 201120140350U CN 202049233 U CN202049233 U CN 202049233U
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Abstract
The utility model relates to a digital phase patching receiving system for improving permatron radar improvement factors, which consists of a time sensitivity control system, a low noise amplifier, a power divider, a frequency mixer, a pressure control oscillator, an amplifier filter, an analog-to-digital converter, an intermediate frequency (IF) processor, a cohenrent processor, an optical fiber interface, a BURST (sample) processing and reconstruction element, a digital-to-analog converter, an analog-to-digital converter, a time sequence circuit 1.6193M crystal oscillator and an emitting reference. The digital phase patching receiving system overcomes the defect that the improvement on the emitting improvement factors in the prior art is little, so the permatron radar improvement factors are improved by more than 10dB, and the radio frequency receiving and digital IF receiving part of the digital phase patching receiving system adopts the integrated and universal modularized technology. The digital phase patching receiving system has the advantages that a permatron radar can discover and track large targets such as boats, naval vessels and the like, in addition, small fast targets such as airplanes and the like can be discovered and tracked, and the economic benefits and the military benefits of the digital phase patching receiving system are good.
Description
Technical field
The utility model belongs to the Radar Technology field, is specifically related to a kind of numeral that improves magnetron radar improvement factor and mends the Phase Receiver system.
Background technology
The components of modern Radar system needs dynamic greatly, high linearity and ideal I Q(quadrature) receiver of quality, it has proposed very big challenge to traditional analog receiver, along with high-speed AD (modulus) transducer and DSP(digital signal processing) development of technology, the digital intermediate frequency receiver module has become modern radar and has improved one of important technology of performance, it utilizes if direct sampling, handle acquisition video IQ signal by high-speed digital signal, has the image-frequency rejection ratio height, advantages such as linear dynamic range is big, high conformity.But present digital intermediate frequency receiver module is limited to full coherent (doing) radar system mostly, and is not suitable for the non-coherent of magnetron system or receives coherent radar.Because it is low that the magnetron system has a cost, advantages such as power is big, use still more extensive at present, thereby existing magnetron system radar is received digitizing and coherent transformation by digital if technology, not only can significantly promote dynamic range, indexs such as system sensitivity, and can make it become the coherent system of high stability.
Because the magnetron price is very low, still have a lot of magnetron radars now in the whole nation, what have is still round-the-clock on duty, and these old radars are mended the phase technology if add numeral, not only can find also general objectives such as ocean-range vessel, warship, and can find and quick little target such as tracking aircraft that its economic benefit and military benefit are all good.
Launch pouring-in phase-locked be early occur a kind of, it injects a coherent signal before magnetron discharge, the difference on the frequency that the oscillation frequency of fine setting magnetron makes it and injects coherent signal is within phase locked track (phase-locked bandwidth) scope, make to transmit and to inject signal phase-locked, thereby realize the coherent emission.Its shortcoming is that the injecting power that needs is bigger, and about the general little 10-20dB of an injecting power specific power output, injecting signal often needs the above amplifier of two-stage, and cost is higher.
Injection phase-locking magnetron system is owing to be subjected to the influence of factors such as locked-in oscillator phase noise, magnetron oscillator frequency shakiness and the phase-locked shakiness of phase-locked system itself, and performance is not high, and reliability is low, realizes the cost height.
Receive pouring-in phase-locked be will launch the sample medium-frequency pulse at receiving end to be injected into the intermediate frequency coherent oscillator, be used for synchronous coherent oscillator, phase-locked coherent oscillator output after synchronously can be considered the continuity of transponder pulse vibration, is most widely used at present.The advantage of this method is not need big injecting power, shortcoming is a coherent oscillator from free-running operation to phase-locked needs certain locks in time, influences such as phase-locked back coherent oscillator frequency shakiness, phase-locked error, its phase stability is lower, exist the phasing precision with distance decline problem simultaneously, its improvement factor generally can only reach about 10-20dB in the moving-target radar.While is owing to the influence of inherent defects such as being subjected to that mimic channel varies with temperature, poor stability, maintenance cost height.
The analog intermediate frequency coherent is received on the principle and receives similar with pouring-in coherent, its difference is to utilize the temporary emission of surface acoustic wave (SAW) device sample medium-frequency pulse, SAW storage relevant convolver carries out the complex conjugate relevant treatment as CPU (central processing unit) at Mid Frequency, eliminates or reduces the restriction of the instability of emission coefficient to improvement factor.Its advantage is that analog signal processing speed is fast, and cost is low, and shortcoming is the further raising that the non-ideal factor of SAW device itself has limited the radar improvement factor, and operational precision is not high, and very flexible realizes having certain degree of difficulty for the system of transponder pulse broad.
The numeral coherent is received on the principle and receives similar with the analog intermediate frequency coherent, utilize AD that the transponder pulse sample is taken a sample, carry out relevant or convolution with this sampling value with echoed signal then, realize phase correction, reach and eliminate the purpose of first phase at random, this method can reach 30dB to the restriction of improvement factor.But because such coherent processing is generally carried out at the video linear passageway at present, performance is subjected to the linear passageway dynamic range, the influence of front end non-ideal factors such as IQ signal quality, simultaneously because video AD sampling rate generally not high (the hardware signal processing power is limit), so for narrow pulse system, because the hits of transponder pulse sample is less, the phasing precision is not high, can not realize the AFC(automatic frequency tracking of wide region simultaneously) control.
Prior aries such as coherent formula have the few shortcoming of emission improvement factor raising, and the utility model can make the magnetron radar emission system enhancement factor improve more than the 10dB.
Summary of the invention
Technical problem to be solved in the utility model is that utilization receiving system numeral benefit phase technology significantly improves the magnetron radar emission system enhancement factor, thereby the old radar of a lot of magnetrons (greatly even round-the-clock on duty) that makes active service not only can find and general objectives such as ocean-range vessel, warship, and can find and quick little target such as tracking aircraft.
Improve magnetron radar improvement factor at present and all be confined in the signal processing system, the utility model has adopted the digital intermediate frequency reception technique, and this digital intermediate frequency receiver module can realize that not only intermediate frequency produces digital signal, and can calculate the phase differential between adjacent arteries and veins.
The utility model has solved the problem that improves magnetron radar improvement factor, and radio frequency reception and digital intermediate frequency receiving unit that this numeral is mended the Phase Receiver system have adopted integrated, Universal, modular technology.
The technical scheme that the utility model adopted is:
A kind of numeral that improves magnetron radar improvement factor is mended the Phase Receiver system, is made up of time sensitivity control STC system 1, low noise amplifier LNA2, power splitter 3, frequency mixer 4, voltage controlled oscillator VCO the 5, the 1st amplification filtering the 6, the 2nd amplification filtering 7, analog-digital converter AD8, medium-frequency IF processor 9, relevant processor the 10, the 1st optical fiber interface the 11, the 2nd optical fiber interface 12, BURST sample process and reconstruct 13, analog-digital converter AD14, digital analog converter DA15, sequential circuit 1.6193M crystal oscillator 16, transmitted reference 17;
The pulsed modulation echoed signal of antenna is connected to low noise amplifier LNA2 after time sensitivity control STC system 1 handles, low noise amplifier 2 outputs connect power splitter 3, the two-way of power splitter 3 is exported one the tunnel and is connected frequency mixer 4, and another road is connected to the front end of accepting of former radar system; The output of voltage controlled oscillator VCO 5 connects frequency mixer 4, the output of frequency mixer 4 connects the 1st amplification filtering 6, the output of the 1st amplification filtering 6 connects the 2nd amplification filtering 7, the output of the 2nd amplification filtering 7 connects analog-digital converter AD8, the output of analog-digital converter AD8 connects medium-frequency IF processor 9, the output of medium-frequency IF processor 9 connects relevant processor 10, the output of relevant processor 10 connects the 1st optical fiber interface 11, the output of the 1st optical fiber interface 11 connects the 2nd optical fiber interface 12, the output of analog-digital converter AD14 connects BURST sample process and reconstruct 13, the output of BURST sample process and reconstruct 13 connects relevant processor 10, the DAFC numeral self-frequency tonal signal output of BURST sample process and reconstruct 13 connects digital analog converter DA15, the output of digital analog converter DA15 connects voltage controlled oscillator VCO 5, and the Trig of relevant processor 10 triggers output and connects BURST sample process and reconstruct 13, medium-frequency IF processor 9;
Described a kind of numeral that improves magnetron radar improvement factor is mended the Phase Receiver system, adopts digital intermediate frequency to accept the improvement factor that technology improves the magnetron radar;
The radio frequency that described a kind of numeral that improves magnetron radar improvement factor is mended the Phase Receiver system receives and the digital intermediate frequency receiving unit adopts integrated, Universal, modular technology.
Radio frequency attenuator, low noise amplifier LNA2, the voltage controlled oscillator VCO (5) of the time sensitivity control STC system 1 of radio frequency receiving unit adopt monolithic integrated microwave circuit MMIC technology, and its mmic chip adopts the spun gold of 0.25 μ m to be connected with external circuit.
The time sensitivity control STC system 1 of radio frequency receiving unit, low noise amplifier LNA2, voltage controlled oscillator 5, sequential circuit 1.6193M crystal oscillator 16, transmitted reference the 17, the 1st amplifilter the 6, the 2nd amplifilter 7, frequency mixer 4 all are designed to independently general module, each general module is provided with general-purpose interface, can be that other system calls by general-purpose interface.
Analog-digital converter 8, analog-digital converter 14, medium-frequency IF processor 9, relevant processor 10, sample process and reconstruct 13, digital analog converter 15 and the 1st optical fiber interface the 11, the 2nd optical fiber interface 12 constitute the digital intermediate frequency receiver module;
Circuit in the digital intermediate frequency receiver module all adopts surface mount device and is integrated on the double-clad board;
The digital intermediate frequency receiver module freely is connected by optical fiber interface with the digital signal processing dsp system on the structure, and transmission signals is convenient and swift.
The digital intermediate frequency receiver module adopts advanced transponder pulse analytical algorithm.
Good effect of the present utility model is:
Integrated, Universal, modular designing technique realization numeral benefit Phase Receiver system that the utility model adopts uses this numeral to mend Phase Receiver system and has improved magnetron radar improvement factor.The numeral coherent is received on the principle and receives similar with the analog intermediate frequency coherent, utilize AD that the transponder pulse sample is taken a sample, carry out relevant or convolution with this sampling value with echoed signal then, realize phase correction, reach and eliminate the purpose of first phase at random, this method can reach 30dB to the restriction of improvement factor.
Numeral is mended the STC that Phase Receiver system radio frequency receives, its radio frequency attenuator adopts the MMIC(monolithic integrated microwave circuit) technology, its mmic chip and external circuit adopt the spun gold interconnection technique of 0.25 μ m, improved system integration degree (LNA and VCO have also adopted this technology), STC, LNA, VCO, sequential circuit 1.6193M crystal oscillator, transmitted reference, amplification filtering and frequency mixer are independently general module, general-purpose interface is arranged, can call for other system.AD, IF processor, relevant processor, BURST (sample) processing and reconstruct, DA circuit all adopt surface mounting component, constitute the digital intermediate frequency receiver module, this digital intermediate frequency receiver module adopts the digital circuit integrated technology, be integrated on the double-clad board, constitute an independently general module, can be called by other system (comprising coherent system).Structurally the digital intermediate frequency receiver module freely is connected by (optical fiber interface plate) with dsp system, and transmission signals is convenient and swift.
The utility model has adopted the Universal, modular designing technique of circuit, has simplified circuit structure to greatest extent, realizes that self is integrated.
The utility model is typically applied in the magnetron radar system.The radio-frequency module of this utility model can be common to the radio system of C-band, its digital intermediate frequency receiver module is furnished with advanced transponder pulse analytical algorithm, can be applicable to the non-coherent of magnetron or receive coherent system and full phase parameter radar, for the magnetron system, it can provide digital phasing, and output power is proofreaied and correct, functions such as numeral AFC, for full phase parameter radar, it can further utilize klystron emission impulse smaple to carry out digital phase correcting, transmit power correction etc.It also can be used as the powerful tool of radar system performance of front end test.
The utlity model has very high engineering practical value, its military value and economic worth are very considerable.
Description of drawings
Fig. 1 is a structure principle chart of the present utility model.
Fig. 2 is the circuit diagram of counter liner code-nonlinear code of the present utility model.
Fig. 3 is A/D of the present utility model, amplifier and emitter follower circuit figure.
Fig. 4 is a VCO circuit diagram of the present utility model.
Fig. 5 is put circuit diagram for of the present utility model mixing.
Fig. 6 is crystal oscillator frequency multiplier circuit figure of the present utility model.
Fig. 7 is a digital intermediate frequency receiver module schematic diagram of the present utility model.
Embodiment
The utility model overcome launch pouring-in, receive that the emission improvement factor improves few shortcoming in the prior aries such as pouring-in, analog intermediate frequency coherent formula, the magnetron radar emission system enhancement factor is improved more than the 10dB, and radio frequency reception and digital intermediate frequency receiving unit that this numeral is mended the Phase Receiver system have adopted integrated, Universal, modular technology.
The composition of hardware of the present utility model is as shown in Figure 1: the utility model is by time sensitivity control (STC) system 1, low noise amplifier (LNA) 2, power splitter 3, frequency mixer 4, voltage controlled oscillator (VCO) 5, the 1st amplification filtering 6, the 2nd amplification filtering 7, analog-digital converter (AD) 8, intermediate frequency (IF) processor 9, relevant processor 10, the 1st optical fiber interface 11, the 2nd optical fiber interface 12, BURST (sample) handles and reconstruct 13, analog-digital converter (AD) 14, digital analog converter (DA) 15, sequential circuit 1.6193M crystal oscillator 16, transmitted reference 17 is formed, wherein
Time sensitivity control (STC) system 1 connects low noise amplifier (LNA) 2, low noise amplifier output connects power splitter 3, power splitter output connects frequency mixer 4, the output of voltage controlled oscillator (VCO) 5 connects frequency mixer 4, the output of frequency mixer connects the 1st amplification filtering 6, the output of the 1st amplification filtering 6 connects the 2nd amplification filtering 7, the output of the 2nd amplification filtering 7 connects analog-digital converter (AD) 8, the output of analog-digital converter connects the IF(intermediate frequency) processor 9, the output of intermediate frequency (IF) processor connects relevant processor 10, the output of relevant processor connects the 1st optical fiber interface 11, the output of the 1st optical fiber interface 11 connects the 2nd optical fiber interface 12, the output of analog-digital converter (AD) 14 connects BURST (sample) and handles and reconstruct 11, BURST (sample) handles and the output of reconstruct connects relevant processor 10, BURST (sample) handles and the DAFC(numeral self-frequency of reconstruct is transferred) signal output connection digital analog converter (DA) 15, the output of digital analog converter (DA) connects voltage controlled oscillator (VCO) 5, and Trig (triggering) output of relevant processor 10 connects BURST (sample) and handles and reconstruct 13, intermediate frequency (IF) processor 9.
Concrete principle of work of the present utility model is:
Numeral is mended the Phase Receiver systemic-function:
Pulse modulated weak echo signal by antenna, behind STC1, after LNA2 amplifies, divide two-way by power splitter 3 merits, one road receiving front-end to former radar system, another road is to the local oscillation signal mixing of frequency mixer 4 with voltage controlled oscillator (VCO) 5, after output intermediate-freuqncy signal to the 1 amplifilter 6 amplification filtering, again through the 2nd amplifilter 7 amplification filtering, this intermediate-freuqncy signal is added to be delivered to intermediate frequency (IF) processor 9 with sampled value after analog-digital converter (AD) 8 sampling and carries out intermediate frequency process, result send relevant processor 10 to handle, the BURST data are sent into 32 floating-point coprocessors simultaneously and are carried out the real-time high-precision spectrum analysis, to extract the various information of transponder pulse, such information feedback is used for relevant processing to echo data to the relevant processing module 10 of intermediate frequency, last comprehensive one-tenth Doppler numeral i/q signal, i/q signal is delivered to this locality (strange land) signal processor by high speed the 1st optical fiber interface 11.All intermediate frequency coherents are handled, the BURST spectrum analysis, AFC control etc. are all in the inner processing in real time of digital intermediate frequency receiver module, spot sampling, site disposal cooperates the 2nd optical fiber interface 12 at receiving end, can be at the data acquisition module that removes the original system signal processor, automatic frequency adjusting system, even use own digital signal processor behind the timing circuit easily, this moment, a normal radar upgraded to high-performance reception coherent doppler system.16 DAFC that both can export serial are used to adjust the frequency of numerical control local oscillator, also can by join outward the oscillation frequency of the general VCO local oscillator of AFC DA module controls, then it can use its output frequency to adjust control signal UP(frequency to raise for the frequency stabilization system by the tuned magnetron frequency), the control of DOWN(frequency downconverts) and the LOCK(locking indicate) signal, thereby can be easily and the self-frequency demodulation circuit interface of different radar systems.After upgrading to high-performance reception coherent doppler system, corresponding being improved of emission improvement factor of radar system.
The system integration, Universal, modular principle are:
Integrated one: STC1 in radio frequency receives, its radio frequency attenuator adopts the MMIC(monolithic integrated microwave circuit) technology, its mmic chip adopts miniaturization technologies such as the spun gold of 0.25 μ m is connected with external circuit, has improved system integration degree (LNA2 and VCO5 have also adopted this technology);
AD(8,14), medium-frequency IF processor 9, relevant processor 10, BURST (sample) handles and surface mounting component is all adopted in reconstruct 13, DA15 circuit integrated two:, (adding the 1st optical fiber interface 11 and the 2nd optical fiber interface 12) constitutes the digital intermediate frequency receiver module, circuit adopts the digital circuit integrated technology in this digital intermediate frequency receiver module, be integrated on the double-clad board, structurally digital intermediate frequency receiver module and dsp system are by optical fiber interface (miniature interface), freely connect, transmission signals is convenient and swift.
Universal, modular: radio frequency receives STC1, LNA2, VCO5, sequential circuit 1.6193M crystal oscillator 16, transmitted reference the 17, the 1st amplification filtering the 6, the 2nd amplification filtering 7 and frequency mixer 4 and is independently general module, and general-purpose interface is arranged, and can call for other system.The digital intermediate frequency receiver module also is an independently general module, can be called by other system (comprising coherent system).
Numeral is mended the principle of work of each several part in the Phase Receiver system:
Fig. 2 and Fig. 3 are the sensitivity time control (STC) system;
Sensitivity time control (STC) claims near area gain control or temporal gain control sometimes again, its implication is exactly to make the sensitivity reduction (with the gain of control amplifier or the way of numerical-control attenuator) of receiver saturated to prevent that the short range clutter from receiver takes place closely the time, making receiver keep original gain and sensitivity at a distance, to guarantee obtaining and detecting of little target.
STC is made up of a radio frequency attenuator and STC signal generator thereof.Radio frequency attenuator is made up of PIN pipe attenuator.The STC signal generator is in order to produce a bias current that postpones in time to change.It is by range counter, an EPLD (electrically programmable memory), a D/A(D/A) transducer and a current driver (including current driver in the radio frequency attenuator that has) composition.
Fig. 2 is counter and liner code-nonlinear code circuit diagram, and its cardinal principle is 11 non-linear registers, its non-linear can be with requiring and change, it is realized by the EPM7128 integrated circuit.
Circuit shown in Figure 3 is A/D, amplifier and emitter follower circuit, and AD568 is converted to aanalogvoltage with 12 nonlinear codes, exports non-linear sawtooth voltage through the AD840 amplifier by emitter following and gives the VCO(voltage controlled oscillator) circuit.
Figure 4 shows that the VCO circuit, the radiofrequency signal of integrated VCO output is through directional coupler, and the main circuit of coupling mechanism is two local oscillation signals, and the signal of coupling mechanism is given the LM339 voltage comparator through the resistance decrement network through the detection diode, detects the failure condition of two local oscillators.
Figure 5 shows that frequency mixer, reach amplification filtering 1 circuit, echoed signal via V1, V2 limiter diode amplitude limit after, through the LNA(LNA) amplify after, by the filtering of Pyatyi microstrip filter, with the local oscillation signal mixing, after the ERA-5 one chip amplifier amplifies, through LC filtering [the 1st amplification filtering] after five-digit number controlling attenuation device after the ERA-5 one chip amplifier amplify through the LC(inductance capacitance) filtering [the 2nd amplification filtering] back exports intermediate-freuqncy signal.
Figure 6 shows that the crystal oscillator frequency multiplier circuit, form crystal oscillating circuit by triode V1 and quartz crystal CRY1, one chip amplifier MAV-11 amplifies with the LC wave filter and forms two frequency multiplier circuits, signal forms five frequency multiplier circuits with the LC wave filter after triode V2 amplifies, its signal is after SGA4586 amplifies, behind the resistance decrement network, form five frequency multiplier circuits through ERA-5SM one chip amplifier LC wave filter, this sample circuit is total to frequency multiplication 50 times.
Figure 7 shows that digital intermediate frequency receiver module theory diagram, digital intermediate frequency receiver module hardware components is divided into digital intermediate frequency receiver module and (optical fiber interface plate) two parts.The digital intermediate frequency receiver module is finished if sampling, Digital IF Processing, relevant processing and Digital Down Convert, IQ Optical Fiber Transmission and conversion.Interface board is finished optical fiber interface, self triggers and regularly produces, the DA output of analog I etc.
From the echo signal of intermediate frequency IF(of receiver intermediate frequency) and transponder pulse intermediate frequency sample (BURST) sample by high-speed AD, the IF sampled value is sent into intermediate frequency processor and is carried out orthogonalization, processing such as matched filtering, and the BURST signal is sent into the BURST analyzer and is carried out the transponder pulse sample analysis after sampling, analyzes content and comprises exomonental amplitude, frequency and phase place three elements.In order to improve the analysis precision of transponder pulse sample, the BURST analyzer adopts 32 floating-point high Precision Processing.The BURST analyzer is sent numerical frequency control signal (DAFC) according to the frequency that estimates and the difference of ideal value, sends frequency rise/downward modulation control level simultaneously.The BURST analyzer is penetrated triggering impulse phase and information such as amplitude and frequency simultaneously and is reached relevant processor and be used for signal reconstruction, relevant processor is according to the BURST reconfiguration information and the IF signal carries out the relevant processing of numeral and echo power is proofreaied and correct, to eliminate the influence of emissive power arteries and veins jitter, at last through comprehensively obtaining 16 video I, Q signal, the IQ signal is sent to signal processor by optical fiber interface, is 16 bit parallel IQ signals by the optical fiber interface plate with the IQ reduction of data of serial at the signal Processing end, offers dsp system IQCLK(orthogonal clock simultaneously) signal and system clock (SCLK).The system clock that the high speed reference clock SCLK that the digital intermediate frequency receiver module is sent can be used as signal processor is used for producing triggering and waits signal, realizes the synchronously complete of transmitting-receiving and signal Processing.
The DAFC signal of pulse analyzer output transmits by serial mode, and AFC code word length is 16, and it is applicable to and adopts this vibrating system of numeral, if system needs aanalogvoltage AFC control, then by DA interface board output simulation AFC signal.For the system of traditional adjustment magnetron frequency, then can use the frequency rise/downward modulation level of its output to carry out the tuning control of magnetron resonance frequency, the maximum magnitude of the frequency-tracking of this digital intermediate frequency receiver module can reach IF ± 20MHz.
In order correctly to obtain the transponder pulse sample, signal processor is uploaded an emission synchronous triggering, and this is uploaded triggering and transmits by optical fiber, transmits the triggering that may cause along deterioration to eliminate cable.The up optical cable of digital intermediate frequency receiver module also supporting signal processor dynamically arranges the digital intermediate frequency receiver module, as change exomonental width, IQ speed etc., but for general application, the upstream Interface signal only needs and will be connected into reference to trigger pulse, the digital intermediate frequency receiver module can have been simplified the interface relationship with signal processor according to default setting work.For signal Processing, the AD transducer output before the output of Fiber Interface Card can be regarded as in the traditional analog reception programme gets final product with its AD data acquisition board that replaces original dsp system, and signal processor need not to do other changes.
Claims (5)
1. a numeral that improves magnetron radar improvement factor is mended the Phase Receiver system, it is characterized in that: by time sensitivity control STC system (1), low noise amplifier LNA(2), power splitter (3), frequency mixer (4), voltage controlled oscillator VCO (5), the 1st amplification filtering (6), the 2nd amplification filtering (7), analog-digital converter AD(8), medium-frequency IF processor (9), relevant processor (10), the 1st optical fiber interface (11), the 2nd optical fiber interface (12), BURST sample process and reconstruct (13), analog-digital converter AD(14), digital analog converter DA(15), sequential circuit 1.6193M crystal oscillator (16), transmitted reference (17) is formed;
The pulsed modulation echoed signal of antenna is connected to low noise amplifier LNA(2 after time sensitivity control STC system (1) handles), low noise amplifier (2) output connects power splitter (3), the two-way of power splitter (3) is exported one the tunnel and is connected frequency mixer (4), and another road is connected to the front end of accepting of former radar system; The output of voltage controlled oscillator VCO (5) connects frequency mixer (4), the output of frequency mixer (4) connects the 1st amplification filtering (6), the output of the 1st amplification filtering (6) connects the 2nd amplification filtering (7), the output of the 2nd amplification filtering (7) connects analog-digital converter AD(8), analog-digital converter AD(8) output connects medium-frequency IF processor (9), the output of medium-frequency IF processor (9) connects relevant processor (10), the output of relevant processor (10) connects the 1st optical fiber interface (11), the output of the 1st optical fiber interface (11) connects the 2nd optical fiber interface (12), analog-digital converter AD(14) output connects BURST sample process and reconstruct (13), the output of BURST sample process and reconstruct (13) connects relevant processor (10), the DAFC numeral self-frequency tonal signal output of BURST sample process and reconstruct (13) connects digital analog converter DA(15), digital analog converter DA(15) output connects voltage controlled oscillator VCO (5), and the Trig of relevant processor (10) triggers output and connects BURST sample process and reconstruct (13), medium-frequency IF processor (9);
Described a kind of numeral that improves magnetron radar improvement factor is mended the Phase Receiver system, adopts digital intermediate frequency to accept the improvement factor that technology improves the magnetron radar;
The radio frequency that described a kind of numeral that improves magnetron radar improvement factor is mended the Phase Receiver system receives and the digital intermediate frequency receiving unit adopts integrated, Universal, modular technology.
2. a kind of numeral that improves magnetron radar improvement factor as claimed in claim 1 is mended the Phase Receiver system, it is characterized in that: radio frequency attenuator, the low noise amplifier LNA(2 of the time sensitivity of radio frequency receiving unit control STC system (1)), voltage controlled oscillator VCO (5) adopts monolithic integrated microwave circuit MMIC technology, its mmic chip adopts the spun gold of 0.25 μ m to be connected with external circuit.
3. a kind of numeral that improves magnetron radar improvement factor as claimed in claim 1 is mended the Phase Receiver system, it is characterized in that: the time sensitivity of radio frequency receiving unit control STC system (1), low noise amplifier LNA(2), voltage controlled oscillator (5), sequential circuit 1.6193M crystal oscillator (16), transmitted reference (17), the 1st amplifilter (6), the 2nd amplifilter (7), frequency mixer (4) all be designed to independently general module, each general module is provided with general-purpose interface, can be that other system calls by general-purpose interface.
4. a kind of numeral that improves magnetron radar improvement factor as claimed in claim 1 is mended the Phase Receiver system, it is characterized in that: analog-digital converter (8), analog-digital converter (14), medium-frequency IF processor (9), relevant processor (10), sample process and reconstruct (13), digital analog converter (15) and the 1st optical fiber interface (11), the 2nd optical fiber interface (12) constitute the digital intermediate frequency receiver module;
Circuit in the digital intermediate frequency receiver module all adopts surface mount device and is integrated on the double-clad board;
The digital intermediate frequency receiver module freely is connected by optical fiber interface with the digital signal processing dsp system on the structure, and transmission signals is convenient and swift.
5. a kind of numeral that improves magnetron radar improvement factor as claimed in claim 1 is mended the Phase Receiver system, and it is characterized in that: the digital intermediate frequency receiver module adopts advanced transponder pulse analytical algorithm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253373A (en) * | 2011-05-06 | 2011-11-23 | 中国电子科技集团公司第三十八研究所 | Digital phase compensation receiving system for increasing improvement factors of magnetron radars |
| CN103913640A (en) * | 2014-02-12 | 2014-07-09 | 南京信息工程大学 | Test system and method for accurately measuring dielectric constants |
-
2011
- 2011-05-06 CN CN201120140350XU patent/CN202049233U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253373A (en) * | 2011-05-06 | 2011-11-23 | 中国电子科技集团公司第三十八研究所 | Digital phase compensation receiving system for increasing improvement factors of magnetron radars |
| CN103913640A (en) * | 2014-02-12 | 2014-07-09 | 南京信息工程大学 | Test system and method for accurately measuring dielectric constants |
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