CN104316908A - Optically controlled phased array radar front end transmitting and receiving method and device - Google Patents
Optically controlled phased array radar front end transmitting and receiving method and device Download PDFInfo
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- CN104316908A CN104316908A CN201410524426.7A CN201410524426A CN104316908A CN 104316908 A CN104316908 A CN 104316908A CN 201410524426 A CN201410524426 A CN 201410524426A CN 104316908 A CN104316908 A CN 104316908A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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Abstract
The invention provides an optically controlled phased array radar front end transmitting and receiving method and a device. The device is based on wavelength division multiplexing, radar radio frequency signals are loaded onto multi-wavelength optical signals when signals are transmitted, and the signals are inputted to an optical delay network; then, the signals are converted into phase-shift electric signals via an optical wavelength division demultiplexer and a photoelectric converter, and the electric signals are transmitted via a microwave antenna array; and when the signals are received, the received electric signals are loaded onto a multi-wavelength optical carrier, and the optical signals are converted into phase-compensation electric signals via a photoelectric conversion array for subsequent processing after passing through the wavelength division multiplexing optical delay network. An optical switch and an electrical switch are used to carry out time division multiplexing on a multi-wavelength laser source, the wavelength division multiplexing optical delay network, the photoelectric conversion array and other devices and structures in the case of transmitting and receiving of the optically controlled phased array radar, repeated use of key devices can be fully realized, the optically controlled phased array radar transmitting and receiving structure is simple and compact, and the cost of the optically controlled phased array radar is reduced.
Description
Technical field
The invention belongs to Optical Controlled Phased Array Antenna technical field, particularly relate to a kind of launching and receiving method and device of Optical Controlled Phased Array Antenna front end.
Background technology
Optical Controlled Phased Array Antenna make full use of optics large bandwidth, fiber transmission attenuation low, exempt from the advantages such as electromagnetic interference (EMI), solve broadband that phased array of microwaves radar faces, aperture get over the problems such as compensation.Since Optical Controlled Phased Array Antenna concept proposes, domestic and international Duo Jia unit carried out the research of Optical Controlled Phased Array Antenna.
Based on the Optical Controlled Phased Array Antenna of wavelength-division multiplex technique, the number of optical carrier wavelength number and phased array antenna submatrix is corresponding, can control multiple submatrixes time delay simultaneously, have outstanding advantage and good performance.In order to realize multi-wavelength time delay network, optical WDM device or grating (space grating or fiber grating) mainly can be adopted to complete.The Budi Juswardy proposition wavelength-division multiplex of Australian Edith Cowan university in 2009 combines with space grating and realizes microwave phase shift, demonstrates 5 wavelength, the maximum delay realizing for 2.5 nanoseconds of each wavelength.The Xiaoke Yi of Sydney University proposed to utilize space grating light splitting in 2011, can realize the phase shift of 10-20GHz signal 0 to 2 π.University of Ottawa Yao Jianping seminar of Canada carries out carrying out the work in Optical Controlled Phased Array Antenna comparatively early utilizing fiber grating.Utilize the fiber grating delay network structure being separated arrangement, combine via chirp grating, Bragg grating and single-mode fiber fixed delay, utilize wavelength-division multiplex technique can realize being up to the delay of the nearly 1000ps of 18GHz.The Moshe Tur seminar of Tel Aviv, Israel university proposed the technology postponed based on wavelength-division multiplex and optical fiber true time in 2008,2011.The core of the program arranges different delays at the wavelength channel that wavelength division multiplexer is different, and utilize the silver-plated end face of optical fiber as catoptron to realize microwave relay, between wavelength channel, delay interval is about 50ps.
A lot of unit proposes the system schema of Optical Controlled Phased Array Antenna, but mainly concentrates on transmitting branch, and the reception programme for Optical Controlled Phased Array Antenna then relates to less.The Maggie Yihong Chen of Univ Texas-Austin USA, reported the transmitting and receiving experimental work of Optical Controlled Phased Array Antenna in 2013, but transmitting, reception was carried out discretely, not to the structure of transmitting and receiving proposition system.
Summary of the invention
The object of the invention is to the launching and receiving method and the device that propose a kind of Optical Controlled Phased Array Antenna front end, completed by the different piece of equipment with the transmitting and receiving work solving existing Optical Controlled Phased Array Antenna, baroque problem.
The second object of the present invention is the launching and receiving method and the device that propose a kind of Optical Controlled Phased Array Antenna front end, to realize the time-sharing multiplex of Primary Component in Optical Controlled Phased Array Antenna, has simplified the object of Optical Controlled Phased Array Antenna structure.
The third object of the present invention is the launching and receiving method and the device that propose a kind of Optical Controlled Phased Array Antenna front end, to realize improving the utilization factor of Optical Controlled Phased Array Antenna inner module and reducing the object of system cost.
Technical solution of the present invention is as follows:
For achieving the above object, the invention provides a kind of launching and receiving method of Optical Controlled Phased Array Antenna front end, it is characterized in that, comprise signal step of transmitting and Signal reception step, wherein:
Signal step of transmitting specifically comprises the following steps: 1) produce radar radiofrequency signal and the first multiple wavelength optical signal; 2) described radar radiofrequency signal is carried on described first multiple wavelength optical signal is modulated to modulated light signal; 3) time delay is carried out to described modulated light signal, solution involves opto-electronic conversion process, obtain the rf signal of plural road phase shift; 4) rf signal of described phase shift is carried out radar signal;
Signal reception step specifically comprises the following steps: A) receive echoed signal, and produce the second multiple wavelength optical signal; B) described echoed signal is carried on described second multiple wavelength optical signal and is modulated to echo modulation light signal; C) compensation of delay, decomposition and photoelectricity are carried out to described echo modulation light signal and change process, obtain the electric echo signal of plural road phase compensation; D) electric echo signal of described phase compensation is being carried out back-end processing;
Wherein, described first multiple wavelength optical signal and described second multiple wavelength optical signal produce by same multi-wavelength light source module timesharing, described step 3) and step C) by same Optically controlled microwave module time-division processing, described step 4) and step D) by same antenna module time-division processing.
Preferably, described step 1) specifically comprise, produced the light signal of plural road different wave length by a multiwavelength laser source, then the light signal of this plural road different wave length is multiplexed with the first multiple wavelength optical signal described in a road.
Preferably, described step 3) specifically comprise, first described modulated light signal is carried out delay process, obtain time delayed signal, secondly this time delayed signal is carried out the plural road modulated light signal that light wave is decomposed into different wave length, more described plural road modulated light signal is carried out the rf signal that opto-electronic conversion obtains the phase shift of plural road respectively.
Preferably, described time delay and compensation of delay process are all undertaken by a time delay network, described time delay network comprises the delay cell of K level series connection, to the 1st grade of delay unit, described modulated light signal or described echo modulation light signal enter the 3rd light wavelength division multiplexing by a photoswitch and an optical circulator, this light wavelength division multiplexing inputs N number of fibre delay line after the signal decomposition of input is multiplexed with N road signal respectively to postpone, signal after delay reflects again through described N number of optical delay line and described 3rd light wavelength division multiplexing through N number of fiber reflector, circulator exports next stage delay cell to, by that analogy until K level delay process is complete, obtain time delayed signal.
Preferably, to i-th grade of delay unit, true time time delay is 2
i-1Δ τ, wherein, Δ τ is different wave length signal non-uniform time spacing value.
Preferably, described step 4) specifically comprise, give an aerial array by the rf signal of described plural road phase shift through a T/R Array transfer, and carry out radar signal by aerial array described in described T/R antenna array control.
Preferably, described steps A) specifically comprise, the light signal of plural road different wave length is produced by a multiwavelength laser source, again the light signal of this plural road different wave length is multiplexed with the second multiple wavelength optical signal described in a road, and the reception of echoed signal is carried out by T/R antenna array control one aerial array, the signal received is exported by described T/R array by described aerial array, obtains echoed signal.
Preferably, described step B) specifically comprise, described second multiple wavelength optical signal is decomposed into plural road optical carrier, described echoed signal is carried in described plural road optical carrier, obtain plural road echo optical signal, more described plural road echo optical signal is multiplexed with echo modulation light signal described in a road.
Preferably, described step C) specifically comprise, first compensation of delay is carried out to described echo modulation light signal, obtain compensation of delay light signal, secondly this compensation of delay light signal is carried out the plural road compensation echo optical signal that light wave is decomposed into different wave length, more described plural road compensation echo optical signal is carried out the electric echo signal that opto-electronic conversion obtains the phase compensation of plural road respectively.
Present invention also offers a kind of transmitting and receiving device of Optical Controlled Phased Array Antenna front end, comprise multi-wavelength light source module, send signal madulation module, echoed signal modulation module, Optically controlled microwave module and Anneta module, also comprise the first switch, second switch and electric circulator array;
When this device transmits, described multi-wavelength light source module is through described first switch and described transmission signal madulation model calling, described transmission signal madulation module is through described second switch and described Optically controlled microwave model calling, and described Optically controlled microwave module is connected with described Anneta module through described electric circulator array;
During this device Received signal strength, described Anneta module is connected with described echoed signal modulation module through described electric circulator array, described multi-wavelength light source module is connected with described echoed signal modulation module through described first switch, described echoed signal modulation module is through described second switch and described Optically controlled microwave model calling, and described Optically controlled microwave module is connected with an electricity back end processing module.
Preferably, described multi-wavelength light source module comprises multiwavelength laser source and the first light wavelength division multiplexing, described multiwavelength laser source is for generation of the light signal of plural road different wave length, and described first light wavelength division multiplexing is used for the light signal of this plural road different wave length to be multiplexed with a road multiple wavelength optical signal.
Preferably, described transmission signal madulation module comprises radar radio-frequency head and the first electrooptic modulator, described radar radio-frequency head is for exporting radar radiofrequency signal, and described first electrooptic modulator, for described radar radiofrequency signal is carried in described multiple wavelength optical signal, obtains modulated light signal.
Preferably, described echoed signal modulation module comprises the second electrooptic modulator, the second photodissociation interleaver and the second light wavelength division multiplexing.
Preferably, described Optically controlled microwave module comprises light time delay network, the first photodissociation interleaver, photoelectric commutator array and electric switch array, the input end of described smooth time delay network is the input end of described Optically controlled microwave module, the output terminal of described smooth time delay network is connected with described first photodissociation interleaver, described first photodissociation interleaver is connected with photoelectric commutator array, and described photoelectric commutator array is connected with described electric switch array;
When this device transmits, the output terminal of described electric switch array is connected with described electric circulator array, and during this device Received signal strength, the output terminal of described electric switch array is connected with an electricity back end processing module.
Preferably, described smooth time delay network comprises the delay cell of K level series connection, and each delay cell comprises a photoswitch, an optical circulator, one the 3rd light wavelength division multiplexing, N number of fibre delay line and N number of fiber reflector;
The signal input part of light time delay network is the input end of the photoswitch of the 1st grade of delay cell, and the output terminal of the photoswitch of K level delay cell is the output terminal of light time delay network;
To the 1st grade of delay unit, described modulated light signal or described echo modulation light signal enter the 3rd light wavelength division multiplexing by described photoswitch and described optical circulator, this light wavelength division multiplexing inputs described N number of fibre delay line respectively after the signal decomposition of input is multiplexed with N road signal postpones, signal after delay reflects through described N number of fiber reflector respectively and again exports next stage delay cell to through described N number of optical delay line and described 3rd light wavelength division multiplexing, circulator, by that analogy until complete K level delay process, obtain time delayed signal.
Preferably, the transmitting and receiving device of Optical Controlled Phased Array Antenna front end according to claim 10, is characterized in that, described Anneta module comprises a T/R array and an aerial array.
Beneficial effect of the present invention is:
1, apparatus of the present invention are transmitting and receiving devices of a kind of Optical Controlled Phased Array Antenna front end based on wavelength-division multiplex, by the combination of photoswitch, electrical switch, the photoelectricity mixing transmitting and receiving device of complexity is combined, improves the work efficiency of device, reduce the cost of device.
2, in the present invention, the part such as multiwavelength laser source, light time delay network, photoelectric commutator array all plays the modulating action loading radiofrequency signal at launching phase and reception stage, the mode of this time-sharing multiplex has simplified radar system structure, improve the utilization factor of module, reduce the cost of system.
3, in the present invention, time delay is carried out by converting electrical signals to light signal, be conducive to the phase shift processing band-limited electric signal, solve the mutual interference easily occurred when the electric signal being only tens to hundreds of million to bandwidth carries out multi-phase delay, postpone the shortcoming that precision is lower, all the other electromagnetic interference can be avoided to the process of light signal simultaneously, make the degree of accuracy of this device higher.
Accompanying drawing explanation
Fig. 1 is the transmitting and receiving device composition structural representation of Optical Controlled Phased Array Antenna front end of the present invention;
Fig. 2 is the detailed topologies schematic diagram of the transmitting and receiving device of Optical Controlled Phased Array Antenna front end of the present invention;
Fig. 3 is the structural representation of the light time delay network of apparatus of the present invention preferred embodiment.
Embodiment
A specific embodiment of the present invention is provided below in conjunction with accompanying drawing.The present embodiment is implemented premised on technical scheme of the present invention, gives detailed embodiment and process, but protection scope of the present invention should not be limited to following embodiment.
As shown in Figure 1, the transmitting and receiving device of Optical Controlled Phased Array Antenna front end of the present invention comprises: multi-wavelength light source module, transmission signal madulation module, echoed signal modulation module, Optically controlled microwave module and Anneta module, also comprise the first switch, second switch and electric circulator array.The stiff end of the first switch 3 is connected with multi-wavelength light source module, two optional ends of the first switch 3 are connected with transmission signal madulation module and echoed signal modulation module respectively, the stiff end of second switch 6 is connected with Optically controlled microwave module, and two optional ends of second switch 6 are respectively with multi-wavelength light source module and send signal madulation module and be connected.
When this device transmits, multi-wavelength light source module is through the first switch 3 and transmission signal madulation model calling, and send signal madulation module through second switch 6 and Optically controlled microwave model calling, Optically controlled microwave module is connected with Anneta module through electric circulator array 11;
During this device Received signal strength, Anneta module is connected with echoed signal modulation module through electric circulator array 11, multi-wavelength light source module is connected with echoed signal modulation module through the first switch 3, echoed signal modulation module is through second switch 6 and Optically controlled microwave model calling, and Optically controlled microwave module is connected with an electricity back end processing module.
As shown in Figure 2, multi-wavelength light source module comprises multiwavelength laser source 1 and the first light wavelength division multiplexing 2.Send signal madulation module and comprise radar radio-frequency head 4 and the first electrooptic modulator 5.Echoed signal modulation module comprises the second electrooptic modulator array 15, second photodissociation ripple multiplexing point of device 14 and the second light wavelength division multiplexing 16.Optically controlled microwave module comprises light time delay network 7, first photodissociation wavelength division multiplexer 8, photoelectric commutator array 9, electric switch array 10.Anneta module comprises T/R array 12 and aerial array 13.
When this device transmits, comprise the following steps:
1) radar radio-frequency head 4 produces radar radiofrequency signal, and this radar radiofrequency signal is inputted the first electrooptic modulator 5, multiwavelength laser source 1 produces the light signal of N road different wave length and is combined into a road multiple wavelength optical signal through the first light wavelength division multiplexing 2 process, and now this multiple wavelength optical signal enters the first electrooptic modulator 5 through the first switch 3;
2) multiple wavelength optical signal radar radiofrequency signal of input first electrooptic modulator 5 being carried in input carries out signal madulation, after modulation, the first electrooptic modulator 5 exports modulated light signal, and now this modulated light signal enters light time delay network 7 through second switch 6;
3) modulated light signal of light time delay network 7 to input carries out delay process input photodissociation wavelength division multiplexer 8, be divided into N road modulated light signal, this N road modulated light signal carries out opto-electronic conversion respectively through N number of photoelectric commutator of photoelectric conversion array 9, obtain the rf signal of N road phase shift, and export electric circulator array 11 to through electric switch array 10, again by electric circulator array 11 gating Anneta module, by the rf signal of phase shift input Anneta module;
4) the T/R array 12 of the rf signal input Anneta module of phase shift, is launched the rf signal of N road phase shift by T/R array 12 control antenna array 13, completes the transmitting of radar signal.
During this device Received signal strength, comprise the following steps:
A) in Anneta module, echoed signal is received by T/R array 12 control antenna array 13, the echoed signal that aerial array 13 receives inputs to electric circulator array 11 through T/R array, echoed signal is inputed to the second electrooptic modulator array 15 of echoed signal modulation module by electric circulator array 11 gating echoed signal modulation module, multiwavelength laser source 1 produces the light signal of N road different wave length and is combined into a road multiple wavelength optical signal through the first light wavelength division multiplexing 2 process simultaneously, and now this multiple wavelength optical signal enters the second photodissociation ripple multiplexing point of device 14 through the first switch 3;
B) in echoed signal modulation module, multiple wavelength optical signal is decomposed into the light signal of N road different wave length and inputs to the second electrooptic modulator array 15 by the second multiplexing point of photodissociation ripple device 14, the light signal that the echoed signal of input is carried in N road different wave length by the second electrooptic modulator array 15 respectively carries out signal madulation, obtain the echo modulation signal decomposed, the echo modulation signal decomposed inputs to the second light wavelength division multiplexing 16 and is multiplexed with a road echo modulation light signal, and now echo modulation light signal inputs to light time delay network 7 through second switch 6;
C) photodissociation wavelength division multiplexer 8 is inputted after the echo modulation light signal of light time delay network 7 to input carries out compensation of delay process, be divided into N road echo modulation light signal, this N road echo modulation light signal carries out opto-electronic conversion respectively through N number of photoelectric commutator of photoelectric conversion array 9, obtain the rf signal of N road phase compensation, and export electricity back end processing module 17 to through electric switch array 10;
D) by electricity back end processing module 17, back-end processing is carried out to the rf signal of this N road phase compensation.
As shown in Figure 3, light time delay network 7 comprises the delay cell of K level series connection, and each delay cell comprises a photoswitch, an optical circulator, one the 3rd light wavelength division multiplexing, N number of fibre delay line and N number of fiber reflector.The signal input part of light time delay network is the input end of the photoswitch of the 1st grade of delay cell, and the output terminal of the optical circulator of K level delay cell is connected with K+1 photoswitch, and the output terminal of this photoswitch is the output terminal of light time delay network;
To the 1st grade of delay unit, modulated light signal or echo modulation light signal enter the 3rd light wavelength division multiplexing by photoswitch and optical circulator, this light wavelength division multiplexing inputs N number of fibre delay line after the signal decomposition of input is multiplexed with N road signal respectively to postpone, signal after delay reflects to re-enter after described N number of optical delay line and described 3rd light wavelength division multiplexing are combined into a road signal through N number of fiber reflector and inputs to optical circulator, exported to the photoswitch of next stage delay cell by optical circulator, by that analogy until K level delay process is complete, obtain time delayed signal.
Wherein, each delay cell comprises N number of optical channel, the light signal of the lasing light emitter of corresponding N number of wavelength.Suppose that the signal entering light time delay network 7 is λ for comprising wavelength
1, λ
2..., λ
nlight signal, the wavelength interval of this light signal evenly and interval time be constant Δ λ.Between the 1st grade of fibre delay line channel line, true time postpones for Δ T (1)=Δ τ.Also accurately make optical fiber delay line length by design, the true time that the 2nd grade of delay line interchannel is formed postpones to be Δ T (2)=2 Δ τ, and the true time formed between 3rd level delay line interchannel postpones for Δ T (2)=2
2Δ τ.The rest may be inferred, and the true time that interchannel is formed in i-th grade of delay cell postpones for Δ T (i)=2
i-1Δ τ.Therefore, the elementary cell that the 3rd light wavelength division multiplexing, N number of fibre delay line and N number of fiber reflector are formed is together in series by circulator and photoswitch, can be formed continuously, the light time delay network 7 of the multi-wavelength light beam forming of fast tunable.Obviously, the delay interval that this progression increases, can realize 0 to 2
(K-1)) successively change totally 2
kplant and postpone combination, significantly add the number of delay ability and formation wave beam.
Wherein, multiwavelength laser source 1 in the present embodiment is laser array, produce the multipath light signal of different wave length by this laser array, or after multiwavelength laser source 1 produces a wide range laser, after a photodissociation wavelength division multiplexer carries out composing segmentation, obtain the multipath light signal of different wave length.
Photoelectric commutator array 9 is PIN or APD, can be relevant balanced detector.
Photoswitch in first switch 3, second switch 6 and delay unit can be magneto-optic shutter or micro-mechanical-optical switch.
Electric switch in electric switch array 10 is radio-frequency (RF) switch.
Electric circulator array in electricity circulator array 11 is radio frequency circulator.
In the transmitting and receiving device of Optical Controlled Phased Array Antenna front end provided by the invention, image intensifer can be adopted to carry out optical path loss compensation to the light signal behind conjunction road at different levels, radio frequency amplifier can be adopted to compensate, with satisfied transmitting or condition of acceptance to the N road electric signal after the conversion of photoelectric commutator array.
Certainly, the light signal of the N road different wave length in apparatus of the present invention and method in echoed signal modulation module also can directly be produced by multiwavelength laser source.Meanwhile, the present invention can realize based on the time delay network of wavelength-division multiplex by chirped fiber grating, also can be combined by diaphragm type wavelength division multiplexer or arrayed waveguide grating multiplexer and optical delay line and realize wavelength-division multiplex time delay network.
Principle of work of the present invention is as follows:
For linear frequency modulation wide band net, when this Optical Controlled Phased Array Antenna transmits, radar radiofrequency signal is modulated at EOM (electrooptic modulator), the light signal of modulation enters the light delay network of wavelength-division multiplex, after time delay, decomposition and opto-electronic conversion process, obtain N road delayed modulation light signal, enter T/R array through uplink and launched by aerial array.
Suppose that RF linear FM signal (radar radiofrequency signal) expression formula is:
Wherein, f
0for radiofrequency signal centre frequency, B is radar signal bandwidth, wide when T is radar signal.N road is loaded with the light signal of radar signal, obtains delay respectively, and after the demodulation of photoelectric commutator array, during transmitting, the signal that aerial array is launched is respectively:
Wherein, τ is the delay interval of the radiofrequency signal sent between each submatrix of aerial array.Now, due to each submatrix of aerial array array element between true time postpone the phase shift that causes, define the wave beam in θ direction.
When this Optical Controlled Phased Array Antenna receives echoed signal, suppose still for the wave beam in this direction is received.In order to form the wave beam in this direction, according to symmetry, now still need to carry out time delay according to formula (2).
Step 1: receive echoed signal.Wherein, transmit such as formula shown in (2), suppose to irradiate target, go through τ two-way time
0after, antenna array receiver to signal can be expressed as:
Step 2: Modulation signal, on light signal, through the compensation of delay identical with when launching, and obtains after being converted to electric signal:
Make t+ τ
0=t', then each rood to signal is:
namely original signal has been recovered.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those skilled in the art is in the technical scope that the present invention discloses; the distortion do the present invention or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (16)
1. a launching and receiving method for Optical Controlled Phased Array Antenna front end, is characterized in that, comprises signal step of transmitting and Signal reception step, wherein:
Signal step of transmitting specifically comprises the following steps: 1) produce radar radiofrequency signal and the first multiple wavelength optical signal; 2) described radar radiofrequency signal is carried on described first multiple wavelength optical signal is modulated to modulated light signal; 3) time delay is carried out to described modulated light signal, solution involves opto-electronic conversion process, obtain the rf signal of plural road phase shift; 4) rf signal of described phase shift is carried out radar signal;
Signal reception step specifically comprises the following steps: A) receive echoed signal, and produce the second multiple wavelength optical signal; B) described echoed signal is carried on described second multiple wavelength optical signal and is modulated to echo modulation light signal; C) compensation of delay, decomposition and photoelectricity are carried out to described echo modulation light signal and change process, obtain the electric echo signal of plural road phase compensation; D) electric echo signal of described phase compensation is being carried out back-end processing;
Wherein, described first multiple wavelength optical signal and described second multiple wavelength optical signal produce by same multi-wavelength light source module timesharing, described step 3) and step C) by same Optically controlled microwave module time-division processing, described step 4) and step D) by same antenna module time-division processing.
2. the launching and receiving method of Optical Controlled Phased Array Antenna front end according to claim 1, it is characterized in that, described step 1) specifically comprises, produced the light signal of plural road different wave length by a multiwavelength laser source, then the light signal of this plural road different wave length is multiplexed with the first multiple wavelength optical signal described in a road.
3. the launching and receiving method of Optical Controlled Phased Array Antenna front end according to claim 1, it is characterized in that, described step 3) specifically comprises, first described modulated light signal is carried out delay process, obtain time delayed signal, secondly this time delayed signal is carried out the plural road modulated light signal that light wave is decomposed into different wave length, more described plural road modulated light signal is carried out the rf signal that opto-electronic conversion obtains the phase shift of plural road respectively.
4. the launching and receiving method of Optical Controlled Phased Array Antenna front end according to claim 1, it is characterized in that, described time delay and compensation of delay process are all undertaken by a time delay network, described time delay network comprises the delay cell of K level series connection, to the 1st grade of delay unit, described modulated light signal or described echo modulation light signal enter the 3rd light wavelength division multiplexing by a photoswitch and an optical circulator, this light wavelength division multiplexing inputs N number of fibre delay line after the signal decomposition of input is multiplexed with N road signal respectively to postpone, signal after delay reflects again through described N number of optical delay line and described 3rd light wavelength division multiplexing through N number of fiber reflector, circulator exports next stage delay cell to, by that analogy until K level delay process is complete, obtain time delayed signal.
5. the launching and receiving method of Optical Controlled Phased Array Antenna front end according to claim 4, is characterized in that, to
ilevel delay unit, true time time delay is 2
i-1
Δ τ, wherein, Δ τ is different wave length signal non-uniform time spacing value.
6. the launching and receiving method of Optical Controlled Phased Array Antenna front end according to claim 4, it is characterized in that, described step 4) specifically comprises, give an aerial array by the rf signal of described plural road phase shift through a T/R Array transfer, and carry out radar signal by aerial array described in described T/R antenna array control.
7. the launching and receiving method of Optical Controlled Phased Array Antenna front end according to claim 1, it is characterized in that, described steps A) specifically comprise, the light signal of plural road different wave length is produced by a multiwavelength laser source, again the light signal of this plural road different wave length is multiplexed with the second multiple wavelength optical signal described in a road, and the reception of echoed signal is carried out by T/R antenna array control one aerial array, the signal received is exported by described T/R array by described aerial array, obtains echoed signal.
8. the launching and receiving method of Optical Controlled Phased Array Antenna front end according to claim 1, it is characterized in that, described step B) specifically comprise, described second multiple wavelength optical signal is decomposed into plural road optical carrier, described echoed signal is carried in described plural road optical carrier, obtain plural road echo optical signal, more described plural road echo optical signal is multiplexed with echo modulation light signal described in a road.
9. the launching and receiving method of Optical Controlled Phased Array Antenna front end according to claim 1, it is characterized in that, described step C) specifically comprise, first compensation of delay is carried out to described echo modulation light signal, obtain compensation of delay light signal, secondly this compensation of delay light signal is carried out the plural road compensation echo optical signal that light wave is decomposed into different wave length, more described plural road compensation echo optical signal is carried out the electric echo signal that opto-electronic conversion obtains the phase compensation of plural road respectively.
10. the transmitting and receiving device of an Optical Controlled Phased Array Antenna front end, it is characterized in that, comprise multi-wavelength light source module, send signal madulation module, echoed signal modulation module, Optically controlled microwave module and Anneta module, also comprise the first switch, second switch and electric circulator array;
When this device transmits, described multi-wavelength light source module is through described first switch and described transmission signal madulation model calling, described transmission signal madulation module is through described second switch and described Optically controlled microwave model calling, and described Optically controlled microwave module is connected with described Anneta module through described electric circulator array;
During this device Received signal strength, described Anneta module is connected with described echoed signal modulation module through described electric circulator array, described multi-wavelength light source module is connected with described echoed signal modulation module through described first switch, described echoed signal modulation module is through described second switch and described Optically controlled microwave model calling, and described Optically controlled microwave module is connected with an electricity back end processing module.
The transmitting and receiving device of 11. Optical Controlled Phased Array Antenna front ends according to claim 10, it is characterized in that, described multi-wavelength light source module comprises multiwavelength laser source and the first light wavelength division multiplexing, described multiwavelength laser source is for generation of the light signal of plural road different wave length, and described first light wavelength division multiplexing is used for the light signal of this plural road different wave length to be multiplexed with a road multiple wavelength optical signal.
The transmitting and receiving device of 12. Optical Controlled Phased Array Antenna front ends according to claim 11, it is characterized in that, described transmission signal madulation module comprises radar radio-frequency head and the first electrooptic modulator, described radar radio-frequency head is for exporting radar radiofrequency signal, described first electrooptic modulator, for described radar radiofrequency signal is carried in described multiple wavelength optical signal, obtains modulated light signal.
The transmitting and receiving device of 13. Optical Controlled Phased Array Antenna front ends according to claim 12, is characterized in that, described echoed signal modulation module comprises the second electrooptic modulator, the second photodissociation interleaver and the second light wavelength division multiplexing.
The transmitting and receiving device of 14. Optical Controlled Phased Array Antenna front ends according to claim 10, it is characterized in that, described Optically controlled microwave module comprises light time delay network, the first photodissociation interleaver, photoelectric commutator array and electric switch array, the input end of described smooth time delay network is the input end of described Optically controlled microwave module, the output terminal of described smooth time delay network is connected with described first photodissociation interleaver, described first photodissociation interleaver is connected with photoelectric commutator array, and described photoelectric commutator array is connected with described electric switch array;
When this device transmits, the output terminal of described electric switch array is connected with described electric circulator array, and during this device Received signal strength, the output terminal of described electric switch array is connected with an electricity back end processing module.
The transmitting and receiving device of 15. Optical Controlled Phased Array Antenna front ends according to claim 14, it is characterized in that, described smooth time delay network comprises the delay cell of K level series connection, and each delay cell comprises a photoswitch, an optical circulator, one the 3rd light wavelength division multiplexing, N number of fibre delay line and N number of fiber reflector;
The signal input part of light time delay network is the input end of the photoswitch of the 1st grade of delay cell, and the output terminal of the photoswitch of K level delay cell is the output terminal of light time delay network;
To the 1st grade of delay unit, described modulated light signal or described echo modulation light signal enter the 3rd light wavelength division multiplexing by described photoswitch and described optical circulator, this light wavelength division multiplexing inputs described N number of fibre delay line respectively after the signal decomposition of input is multiplexed with N road signal postpones, signal after delay reflects through described N number of fiber reflector respectively and again exports next stage delay cell to through described N number of optical delay line and described 3rd light wavelength division multiplexing, circulator, by that analogy until complete K level delay process, obtain time delayed signal.
The transmitting and receiving device of 16. Optical Controlled Phased Array Antenna front ends according to claim 10, is characterized in that, described Anneta module comprises a T/R array and an aerial array.
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