CN203423247U - Mechanical scanning double transceiver type high-power coherent dual-polarization radar feeder system - Google Patents
Mechanical scanning double transceiver type high-power coherent dual-polarization radar feeder system Download PDFInfo
- Publication number
- CN203423247U CN203423247U CN201320471194.4U CN201320471194U CN203423247U CN 203423247 U CN203423247 U CN 203423247U CN 201320471194 U CN201320471194 U CN 201320471194U CN 203423247 U CN203423247 U CN 203423247U
- Authority
- CN
- China
- Prior art keywords
- port
- circulator
- rotary joint
- single channel
- orthogonal mode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
The utility model relates to a mechanical scanning double transceiver type high-power coherent dual-polarization radar feeder system. The mechanical scanning double transceiver type high-power coherent dual-polarization radar feeder system comprises an orthogonal mode component. The mechanical scanning double transceiver type high-power coherent dual-polarization radar feeder system further comprises a single pitch rotary joint. A first circulator, a power divider, a second circulator, a horizontal branch receiver, a vertical branch receiver and a frequency synthesizer are arranged between the orthogonal mode component and the single pitch rotary joint. The first port of the power divider is connected with the single pitch rotary joint. The single pitch rotary joint is connected with the second port of a third circulator through an orientation single rotary joint. The third port of the third circulator is connected with the input end of a delay network through a microwave switch. The output end of the delay network is connected with the input end of a transmitter. The output end of the transmitter is connected with the first port of the third circulator. According to the utility model, the advantage of compact structure can be realized, the number of the pitch rotary joints can be reduced, the transmission distance of a receiving feeder can be shortened, the total losses of a transceiver feeder can be reduced, the multiple feeder performance consistency can be improved, and the detection performance can be improved.
Description
Technical field
The utility model relates to a kind of radar feed system, and two pairs of especially a kind of mechanical scans are received high-power full coherent dual polarization radar feeder systems, belong to the technical field of radar detection.
Background technology
In radar detection field, in order to complete the detection to target, radar complete machine is generally comprised of following components: the subsystems such as transmitting, reception, antenna feeder, signal processing, terminal, power supply, monitoring.For mechanical type radar, in order to complete, to the scanning of target, also must there be day line transmission mechanism and servo subsystem.
Especially, the full coherent dual polarization radar of pulsed is in order to ensure detection performance, and the power of radar transmitter, equipment amount are generally all very large, when equipment amount is greatly to cannot be arranged on antenna time, must microwave signal be transferred to antenna by feeder systems such as waveguides, to go out to air-launched.For full phase parameter radar, the frequency synthesis signal (input signal of transmitter) sending due to receiver at present must from transmitter very close to, during radar return signal, be also by feeder systems such as waveguides, microwave to be transmitted and is sent to receiver from antenna.While working due to mechanical scan antenna, generally need to do the running of orientation and pitching, therefore, in radar waveguide feeder system, can't do without two Primary Components: orientation rotation joint and pitching rotary joint.The performance of the feeder line devices such as these waveguides, rotary joint (such as loss, standing wave, stability etc.) directly affects the performance index of the transmitting-receiving feeder line of radar, thereby has determined the whole detection performance of radar.
Particularly, for adopting two dual polarization radars of sending out two acceptor systems, because transceiver channel has two-way, orientation rotation joint must be two-way, although pitching rotary joint can be used single channel, and must be with two.The consistency of two-way feeder line is the key that can dual polarization radar realize effective detection success or failure.
As shown in Figure 1, first for full phase parameter radar, the frequency synthesis signal being produced by frequency synthesizer 14 inputs to transmitter 10, transmitter 10 amplifies frequency synthesis signal, producing powerful microwave transmits the identical two-way microwave of microwave minute success rate by power splitter 7, and from the second port of power splitter 7 and the 3rd port of power splitter 7, export respectively, every road microwave signal is inputted respectively the first port of the first circulator 6 and the first port of the second circulator 8, and (the four port circulators of take shown in figure are example: between port, transmission characteristic is: the first port is to the second port, the second port to the three ports, the 3rd port to the four ports, the 4th port can normal transmission to the first port direction, almost there is no in theory loss, above-mentioned opposite direction or be not to isolate on the port theory of adjacent), again from the second port output of the second port of the first circulator 6 and the second circulator 8, by orientation two-way rotary joint 5 and be sent to respectively the first port and second port of orthogonal mode 3 through horizontal branches pitching rotary joint 2 and vertical leg pitching rotary joint 4, orthogonal mode 3 is the 3rd port output from described orthogonal mode 3 by the synthetic road of the two-way orthogonally polarized signal of input, through Feed Horn 1, by antenna, the pulse microwave signal with polarization is gone out to spatial emission.
During reception, RX path is the inverse process of above-mentioned transmission path, two-way echo-signal is inputted from the second port of the first circulator 6 and the second port of the second circulator 8 respectively, and enter horizontal branches receiver 12 from the 3rd port of the first circulator 6, from the 3rd port of the second circulator 8, enter vertical leg receiver 13, amplifying, mixing, sampling and signal process, and completes the correlation function of full coherent dual polarization radar.
It is more than the transmitting procedure of existing dual polarization radar feeder signals, owing to being two two acceptor systems of sending out, on feeder line device is selected, " pitching rotary joint " can be single channel, but must be with two, i.e. simultaneously usage level branch road pitching rotary joint 2 and vertical leg pitching rotary joint 4, and in order to ensure the consistency of performance, often need strict " pairing ": while requiring rotation, each rotary joint performance rises and falls as far as possible little; Orientation rotation joint need be with a two-way, must adopt orientation two-way rotary joint 5, high to its performance requirement: when requiring to rotate each rotary joint performance rise and fall try one's best little, also require two isolations between branch road to want high, with regard at present domestic and international technology, also cannot do very highly, always have mutual crosstalking.In addition, because all powerful microwave transmissions generally all will be used waveguide, between radar host computer and antenna, distance is relative all far away, and the variation of the performances such as the loss of waveguide, standing wave is also very important.The existence of the problems referred to above is very disadvantageous to dual polarization radar, and these problems are technical barriers in the industry at present.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of mechanical scan two high-power full coherent dual polarization radar feeder systems of two receipts of sending out, its compact conformation, can reduce the quantity of pitching rotary joint, shorten the transmission range that receives feeder line, reduce the total losses of transmitting-receiving feeder line, improve the consistency of multichannel feeder line performance, improve detection performance.
The technical scheme providing according to the utility model, the two high-power full coherent dual polarization radar feeder systems of two receipts of sending out of described mechanical scan, comprise orthogonal mode; Also comprise single channel pitching rotary joint, between described orthogonal mode and single channel pitching rotary joint, the first circulator, power splitter, the second circulator, horizontal branches receiver, vertical leg receiver and frequency synthesizer are set; The first port of orthogonal mode is connected with the second port of the first circulator, the second port of orthogonal mode is connected with the second port of the second circulator, the 3rd port of the first circulator is connected with horizontal branches receiver, the 4th port of the first circulator is connected with the output of frequency synthesizer, the first port of the first circulator is connected with the second port of power splitter, the 3rd port of the second circulator is connected with vertical leg receiver, and the first port of the second circulator is connected with the 3rd port of power splitter;
The first port of power splitter is connected with single channel pitching rotary joint, single channel pitching rotary joint is connected with the second port of the 3rd circulator by orientation single channel rotary joint, the 3rd port of the 3rd circulator is connected with the input of time delay network by microwave switch, the output of time delay network is connected with the input of transmitter, and the output of transmitter is connected with the first port of the 3rd circulator.
The 3rd port of described orthogonal mode is connected with Feed Horn.The 4th port of described the second circulator is connected with the second load.
The 4th port of described the 3rd circulator is connected with the 3rd load.The delay time of described time delay network is not less than the pulse duration of the frequency synthesis signal of frequency synthesizer generation.
Described the 3rd circulator is between transmitter and orientation single channel rotary joint.
A technical scheme, the loss of a kind of reduction radar feeder and the conforming method of raising two-way feeder line, comprise orthogonal mode; Also comprise single channel pitching rotary joint, between described orthogonal mode and single channel pitching rotary joint, the first circulator, power splitter, the second circulator, horizontal branches receiver, vertical leg receiver and frequency synthesizer are set; The first port of orthogonal mode is connected with the second port of the first circulator, the second port of orthogonal mode is connected with the second port of the second circulator, the 3rd port of the first circulator is connected with horizontal branches receiver, the first port of the first circulator is connected with the second port of power splitter, the 3rd port of the second circulator is connected with vertical leg receiver, the first port of the second circulator is connected with the 3rd port of power splitter, and the 4th port of the second circulator is connected with the output of frequency synthesizer;
The first port of power splitter is connected with single channel pitching rotary joint, single channel pitching rotary joint is connected with the second port of the 3rd circulator by orientation single channel rotary joint, the 3rd port of the 3rd circulator is connected with the input of time delay network by microwave switch, the output of time delay network is connected with the input of transmitter, and the output of transmitter is connected with the first port of the 3rd circulator.
The 4th port of described the first circulator is connected with the second load of described the first circulator coupling.
The delay time of described time delay network is not less than the pulse duration of the frequency synthesis signal of frequency synthesizer generation.
Described the 3rd circulator is between transmitter and orientation single channel rotary joint.
The third similar technical scheme, the loss of a kind of reduction radar feeder and the conforming method of raising two-way feeder line, comprise orthogonal mode; Also comprise single channel pitching rotary joint, the first circulator, power splitter, the second circulator, horizontal branches receiver, vertical leg receiver and frequency synthesizer and the 4th circulator are set between described orthogonal mode and single channel pitching rotary joint; The first port of orthogonal mode is connected with the second port of the first circulator, the second port of orthogonal mode is connected with the second port of the second circulator, the 3rd port of the first circulator is connected with horizontal branches receiver, the first port of the first circulator is connected with the second port of power splitter, the 3rd port of the second circulator is connected with vertical leg receiver, and the first port of the second circulator is connected with the 3rd port of power splitter; The first port of power splitter is connected with the second port of the 4th circulator, and the 4th port of the 4th circulator is connected with frequency synthesizer, and the first port of the 4th circulator is connected with single channel pitching rotary joint;
Single channel pitching rotary joint is connected with the second port of the 3rd circulator by orientation single channel rotary joint, the 3rd port of the 3rd circulator is connected with the input of time delay network by microwave switch, the output of time delay network is connected with the input of transmitter, and the output of transmitter is connected with the first port of the 3rd circulator.
The 4th port of described the first circulator is connected with the first load, and the 4th port of the second circulator is connected with the second load, and the 3rd port of the 4th circulator is connected with the 4th load.
Advantage of the present utility model: by setting up the 3rd circulator, microwave switch and time delay network, after accurately controlling, reach frequency synthesis signal is sent to the object of transmitter by transmitting feeder line passage from the position between single channel pitching rotary joint and Feed Horn, thereby receiver and frequency synthesizer can be arranged on to the position between single channel pitching rotary joint and Feed Horn, the larger transmitter of equipment amount is arranged in radar host computer, in such hardware configuration mode, completes the work of full coherent dual polarization radar.
For radars such as full coherent dual-polarizations, can avoid using expensive but performance undesirable two orientation rotation joints, (many) roads and the pitching rotary joints of two single channel that must strictly match again, and only need select the rotary joint of two conventional single channel, between single channel pitching rotary joint and orientation single channel rotary joint without " pairing ".
In addition, although this single channel pitching rotary joint and orientation single channel rotary joint all can cause equally performance to rise and fall to some extent because rotating when work, due to before power splitter input, therefore, on the not impact of the consistency of two transmission channels.Receive path is owing to being arranged between single channel pitching rotary joint and antenna, and, through above-mentioned single channel pitching rotary joint, orientation single channel rotary joint and the transmission led compared with long wave, the consistency of two receive paths can fully not guarantee yet.By above-mentioned technological means, really can improve the overall performance of full coherent dual polarization radar, compact conformation, can reduce the quantity of pitching rotary joint, shorten the transmission range that receives feeder line, reduce the total losses of transmitting-receiving feeder line, improve the consistency of multichannel feeder line performance, improve detection performance.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of existing dual polarization radar feeder system.
Fig. 2 is structured flowchart of the present utility model.
Fig. 3 is the structure chart of the third technical scheme of the utility model.
Description of reference numerals: 1-Feed Horn, 2-horizontal branches pitching rotary joint, 3-orthogonal mode, 4-vertical leg pitching rotary joint, 5-orientation two-way rotary joint, 6-the first circulator, 7-power splitter, 8-the second circulator, 9-the first load, 10-transmitter, 11-the second load, 12-horizontal branches receiver, 13-vertical leg receiver, 14-frequency synthesizer, 15-single channel pitching rotary joint, 16-orientation single channel rotary joint, 17-the 3rd circulator, 18-microwave switch, 19-the 3rd load, 20-time delay network, 21-the 4th load and 22-the 4th circulator.
Embodiment
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
As shown in Figure 2: in order to reduce the quantity of pitching rotary joint, shorten the transmission range that receives feeder line, reduce the total losses of transmitting-receiving feeder line, improve the consistency of multichannel feeder line performance, improve detection performance, the utility model comprises orthogonal mode 3; Also comprise single channel pitching rotary joint 15, described orthogonal mode 3 and 15 of single channel pitching rotary joints arrange the first circulator 6, power splitter 7, the second circulator 8, horizontal branches receiver 12, vertical leg receiver 13 and frequency synthesizer 14; The first port of orthogonal mode 3 is connected with the second port of the first circulator 6, the second port of orthogonal mode 3 is connected with the second port of the second circulator 8, the 3rd port of the first circulator 6 is connected with horizontal branches receiver 12, the 4th port of the first circulator 6 is connected with the output of frequency synthesizer 14, the first port of the first circulator 6 is connected with the second port of power splitter 7, the 3rd port of the second circulator 8 is connected with vertical leg receiver 13, and the first port of the second circulator 8 is connected with the 3rd port of power splitter 7;
The first port of power splitter 7 is connected with single channel pitching rotary joint 15, single channel pitching rotary joint 15 is connected with the second port of the 3rd circulator 17 by orientation single channel rotary joint 16, the 3rd port of the 3rd circulator 17 is connected with the input of time delay network 20 by microwave switch 18, the output of time delay network 20 is connected with the input of transmitter 10, and the output of transmitter 10 is connected with the first port of the 3rd circulator 17.
Particularly, in the utility model embodiment, the common receiver that forms of horizontal branches receiver 12 and vertical leg receiver 13, to put the first circulator 6, power splitter 7, the second circulator 8, horizontal branches receiver 12, vertical leg receiver 13 and frequency synthesizer 14 and be arranged between orthogonal mode 3 and single channel pitching rotary joint 15, be the first circulator 6, power splitter 7, the second circulator 8, horizontal branches receiver 12, vertical leg receiver 13 and frequency synthesizer 14 to be arranged to the top of antenna.
The 3rd port of described orthogonal mode 3 is connected with Feed Horn 1.The 4th port of described the second circulator 8 is connected with the second load 11.The 4th port of described the 3rd circulator 17 is connected with the 3rd load 19.The delay time of described time delay network 20 is not less than the pulse duration of the frequency synthesis signal of frequency synthesizer 14 generations, and the delay time of time delay network 20 is more than or equal to the pulse duration of the frequency synthesis signal of frequency synthesizer 14 generations.Described the 3rd circulator 17 is between transmitter 10 and orientation single channel rotary joint 16.In the utility model embodiment, the effect of the 3rd load 19 is identical with the effect of aforesaid the first load 9 and the second load 11.
In addition, described Feed Horn 1, orthogonal mode 3, the first circulator 6, the second circulator 8, power splitter 7, the second load 11, transmitter 10, the structure of the 3rd circulator 17 is all consistent with the structure in existing dual polarization radar feeder system, the structure of described single channel pitching rotary joint 15 and orientation single channel rotary joint 16 is also consistent with the structure in existing dual polarization radar feeder system, just in the utility model, adopt the form of single channel, in the utility model embodiment, by adopting single channel pitching rotary joint 15 and orientation single channel rotary joint 16 can improve the consistency of feeder line.Described frequency synthesizer 14 can produce frequency synthesis signal.The effect of the 3rd circulator 17 is mainly to the control of frequency synthesis signal and the transmission direction that transmits and the buffer action between signal.
Power splitter 7 and receiving unit are arranged between single channel pitching rotary joint 15 and Feed Horn 1, with between transmitter 10 as long as orientation single channel rotary joint 16 and single channel pitching rotary joint 15 and corresponding waveguide are connected, in the application process of dual polarization radar, eliminated orientation rotation joint and pitching rotary joint and the adverse effect of corresponding waveguide to consistency and loss, phase place in the index of transmitting feeder line.
Power splitter 7 and receiving unit are arranged between single channel pitching rotary joint 15 and Feed Horn 1, thereby avoided by orientation rotation joint and pitching rotary joint and corresponding waveguide, the echo receiving being transmitted, eliminated the impact of these parts on receptivity, reduce the equipment amount and the loss that receive feeder line, improved the performance that receives feeder line.
In the utility model embodiment, in the first circulator 6, the first port is corresponding with the numeral 1 of mark on the first circulator 6 in figure, in the first circulator 6, the second port, the 3rd port and the 4th port are corresponding with the numeral 2,3 and 4 of mark on the first circulator 6 in figure respectively, the port of orthogonal mode 3, the second circulator 8 and power splitter 7 is described and marks all corresponding consistent with description and the mark of the first circulator 6, and contrast is described no longer one by one.
Particularly, when needs launched microwave pulse signal, the frequency synthesizer 14 of receiver is exported the frequency synthesis signal of high stability under the control of control signal, and inputs the 4th port of the first circulator 6, from the first port output of the first circulator 6; Described frequency synthesis signal enters the second port of power splitter 7 by the first port of the first circulator 6, from the first port output of power splitter 7, be transferred to the second port of the 3rd circulator 17 by single channel pitching rotary joint 15 and orientation single channel rotary joint 16.
When exporting from the 3rd port of the 3rd circulator, the state that control signal has been controlled microwave switch 18 in conducting, the pulse front edge of frequency synthesis signal just starts to enter time delay network 20 like this; The delay time of time delay network 20 is designed to slightly wider than the pulse duration of frequency synthesis signal, like this when the pulse back edge of frequency synthesis signal enters time delay network 20, can guarantee that forward position does not also output to transmitter 10 from time delay network 20, transmitter 10 can not launched powerful microwave signal; When the pulse back edge of frequency synthesis signal enters after time delay network 20 completely, control signal will be controlled microwave switch 18 in closed condition, to guarantee only having frequency synthesis signal to enter time delay network 20; When frequency synthesis signal outputs to transmitter 10 from time delay network 20, just can be by the enlarging function output same frequency of transmitter 10, the first port of powerful microwave signal to the three circulators 17 of same pulse width; The first port of the 3rd circulator 17 is the second port output from described the 3rd circulator 17 by powerful transmitted pulse, then be transferred to the first port of orientation single channel rotary joint 16, single channel pitching rotary joint 15 and power splitter 7.
Power splitter 7 will be divided into the two pulse signals that characteristic is identical from the pulse signal of the first port input, simultaneously from the second port of power splitter 7, the 3rd port output of power splitter 7, this two paths of signals is transferred to respectively the first port of the first circulator 6 and the first port of the second circulator 8 as the transmitted pulse signal of two POLARIZATION CHANNEL of horizontal and vertical, then through the second port of the first circulator 6, the second port of the second circulator 8 enter in orthogonal mode 3.Orthogonal mode 3 is the 3rd port output from described orthogonal mode 3 by the synthetic road of the two-way orthogonally polarized signal of input, by antenna, the pulse microwave signal with polarization is gone out to spatial emission, to have completed the emission function of radar through Feed Horn 1.
In the utility model embodiment, set microwave switch 18 before frequency synthesis signal enters just in conducting state, when frequency synthesis signal transfers immediately in closed condition.Because unavoidable existence between the 3rd circulator 17 ports of reality crosstalked, if not being set, this microwave switch 18 can not cause having crosstalk signal to enter time delay network 20 from the 3rd port of the 3rd circulator 17 during launching, then cause transmitter 10 repeat its transmission.This microwave switch 18 is set, and it is carried out to strict sequencing control, can avoid the generation of above-mentioned situation.Setting up of time delay network 20, has guaranteed that the transmission channel of frequency synthesis signal and shared transmission channel are partly time-sharing multiplexs, has simplified transmitting-receiving feeder line, has guaranteed the enforcement of transmitting-receiving feeder line consistency of performance.The frequency synthesis signal that frequency synthesizer 14 produces enters by time delay network 20 after the input of transmitter 10, as the signal source of transmitting.Described microwave switch 18 and time delay network 20 can adopt conventional technological means to realize.
During reception, the 3rd port of orthogonal mode 3 inputted from Feed Horn 1 the pulse microwave signal with polarization information receiving be transferred to by antenna; Orthogonal mode 3 becomes the two-way polarized signal of horizontal and vertical from the first port of orthogonal mode 3, to input the first circulator 6 respectively the signal decomposition with polarization of the 3rd port input, and inputs the second circulator 8 by the second port of orthogonal mode 3; Then from the 3rd port of the first circulator 6, enter horizontal branches receiver 12, from the 3rd port of the second circulator 8, enter vertical leg receiver 13; Horizontal branches receiver 12 and vertical leg receiver 13 are the receiving system that two-way performance is consistent, the work such as the amplification of energy settling signal, mixing, sampling, signal processing.
In above-mentioned emission process, compare with existing full coherent dual polarization radar feeder system, two conventional single channel rotary joints have only been used, single channel pitching rotary joint 15 and orientation single channel rotary joint 16 have only been adopted, compare with existing full coherent dual polarization radar feeder system, without in orientation, use two-way rotary joint, reduced the quantity of pitching rotary joint.
Because the loss on each road of two-way rotary joint is often greater than the loss of single channel rotary joint, therefore, although do not reduce feeder line length, the feeder line total losses of transmitting or lower than existing full coherent dual polarization radar feeder system.Usefulness for dual polarization radar is also not only that the feeder line total losses of transmitting are low, is mainly that the consistency of two-way transmitting branch has obtained the raising of matter.First, for two used single channel rotary joints without " pairing ", be that 16 of single channel pitching rotary joint 15 and orientation single channel rotary joints are without pairing, even if single performance rises and falls to some extent during real work, due to still in power splitter 7 input front ends, for two-way transmitting branch, the variation of signal is consistent, is conducive to improve the precision that dual-polarization signal is processed; Due to the longest from the waveguide length whole feeder system being transmitted between orientation rotation joint, existing full phase parameter radar feeder system needs two-way, and therefore Zhi Yong mono-tunnel in the utility model embodiment is also conducive to improve the precision that dual-polarization signal is processed; In addition, most critical or on orientation branch road, avoid using two-way rotary joint, because the consistency of two-way rotary joint is poor, isolation is low, these are crucial parts that the transmitting feeder line performance of existing dual polarization radar cannot further improve, and do not have the problem of this respect in the utility model embodiment.
In above-mentioned receiving course, the signal flow of echo does not pass through the rotary joint in pitching and orientation, and transmission channel is extremely short, therefore the distortion factor of signal is reduced to very low level, the factor of also do not exist in conventional scheme due to not the mating of rotary joint completely, isolation is poor, long Distance Transmission etc. affects dual-polarization detection accuracy.
Transmitting-receiving feeder loss and variation to this programme are calculated as follows, and establishing horizontal transmission channel feeder loss and Vertical Launch passage feeder loss is respectively Lf (x), Lf (y); Horizontal receive path feeder loss is respectively Ls (x), Ls (y) with vertical receive path feeder loss; According to the above-mentioned flow process analysis meter of being not difficult, calculate:
Lf(x)=LH(3)+LB(1)+LX(F)+LX(Y)+LG(12)+LH(1)+ LZ(13)+LB(ZF1)；
Lf(y)=LH(3)+LB(1)+LX(F)+LX(Y)+LG(13)+LH(2)+LZ(23)+LB(ZF2)；
Ls(x)=LB(ZS1)+ LZ(31)+LH(1)；
Ls(y)=LB(ZS2)+ LZ(32)+LH(2)；
Wherein: the loss that LH (n) is n circulator, can all be equivalent to LH, n is 1,2 or 3.LB (1) is for exporting to the loss of orientation single channel rotary joint 16 input waveguide parts from transmitter 10; LX (F) is the loss of orientation single channel rotary joint 16, can all be equivalent to LX.LX (Y) is the loss of single channel pitching rotary joint 15, can all be equivalent to LX.LG (ij) be power splitter 7 from i port to the loss j port, can all be equivalent to LG.LZ (lk) be orthogonal mode 3 from l port to the loss k port, can all be equivalent to LZ.LB (ZF1) deducts all waveguide losses of LB (1) part in horizontal transmitting branch.LB (ZF2) deducts all waveguide losses of LB (1) part in Vertical Launch branch road.LB (ZS1) is waveguide loss all in horizontal receive path.LB (ZS2) is waveguide loss all in vertical receive path.Further, LB (ZF1), LB (ZF2), LB (ZS1), LB (ZS2) all can all be equivalent to LB.
Above-mentioned continuous item is carried out to similar merging, and the total losses of establishing horizontal transceiver channel and vertical transceiver channel are Lfs (x), Lfs (y)::
Lfs(x)=3LH+LB(1)+2LX+LG+2LZ+2LB （1）
Lfs(y)= 3LH+LB(1)+2LX+LG+2LZ+2LB （2）
By identical method, conventional scheme is carried out to analytical calculation, can find that the transmitting-receiving feeder loss of existing full coherent dual polarization radar feeder system is:
Lf(x_old)=LG(12)+LH(1)+LB(11)+L2X(F1)+LX(Y1)+ LZ(13) +LB(ZF1)；
Lf(y_old)=LG(13)+LH(2)+LB(22)+L2X(F2)+LX(Y2)+ LZ(23) +LB(ZF2)；
Ls(x_old)= LB(ZS1)+ LZ(31)+ LX(Y1)+ L2X(F1) +LB(11)+ LH(1)；
Ls(y_old)= LB(ZS2)+ LZ(32)+ LX(Y2)+ L2X(F2) +LB(22)+LH(2)；
By above-mentioned identical method to similar merging after, the total losses of two-way transceiver channel can simply be expressed as:
Lfs(x_old)=2LH+2LB(11)+2LX+LG+2LZ+2LB+2L2X(F1) （3）
Lfs(y_old)= 2LH+2LB(22)+2LX+LG+2LZ+2LB+2L2X(F2) （4）
Wherein: LB (11), LB (22) are respectively that the gentle vertical channel of aquaporin exports to the loss of orientation rotation joint input waveguide part from transmitter 10.L2X (F1), L2X (F2) are to be the loss of the orientation rotation joint horizontal and vertical passage of two-way respectively.
Formula (1), formula (2) and formula (3), formula (4) are compared to discovery (take horizontal channel as example):
Lfs(x_old)－Lfs(x)=LB(11)+2L2X(F1)－LH
Wherein, LB (11) and LB (1) can think that be identical aspect loss size, so can offset during computing.In operation result: LB (11) is that horizontal channel exports to from transmitter 10 loss that orientation rotation joint input long wave is led part, 2L2X (F1) is the loss of the horizontal channel, orientation rotation joint of two-way, and LH is the loss of the 3rd circulator newly-increased in the utility model embodiment.With regard to the situation of current device reality, LH is generally less than L2X (F1).Therefore, the transmitting-receiving feeder loss of existing full coherent dual polarization radar feeder system is far longer than the feeder loss of feeder system in the utility model embodiment.
The loss of above-mentioned feeder line except to radar range, survey the ability of small and weak echo influential, the main consistency that also has influence on dual polarization radar two-way transmitting-receiving feeder line, respectively by Lfs (x) with Lfs (y) subtracts each other and Lfs (x_old) and Lfs (y_old) subtract each other and can obtain following result:
Lfs(x)－Lfs(y)=[ LG(12)－LG(13)]+2[LH(1)－LH(2)]+[LZ(13)－LZ(23)]
+[LB(ZF1)－LB(ZF2)]+[LB(ZS1)－LB(ZS2)]+[LZ(31)－LZ(32)]
=0 （5）
Each of subtracting each other in above-mentioned bracket is all the parts that are fixedly connected with, and device used can guarantee that index numerical value consistent or loss own is just minimum, such as: LB (ZF1), LB (ZF2), LB (ZS1), LB (ZS2) are very short because connecting waveguide, and its loss itself just can be ignored; In addition, some index can accurately be measured, and demarcates, revises.Therefore, the operation result of Lfs (x)-Lfs (y), close to 0, that is to say that the consistency of feeder line is high.This is most important to dual polarization radar.
Scheme for existing full coherent dual polarization radar feeder system:
Lfs(x_old)－Lfs(y_old)=2[L2X(F1)－L2X(F2)]+2[LX(Y1)－LX(Y2)]
+2[LB(11)－LB(22)]
If consider the actual conditions of current all devices, also will to above-mentioned operation result repair just like under:
Lfs(x_old)－Lfs(y_old)=2[L2X(F1) －L2X(F2)]+2[LX(Y1) －LX(Y2)]
+2[LB(11) －LB(22)] +C(L2X) （6）
Wherein, L2X (F1) and L2X (F2) are the losses of the orientation rotation joint horizontal and vertical passage of two-way, due to the limitation of technology, also cannot accomplish that the consistency of two passages is fine at present, particularly at rotary course performance, more cannot guarantee; In addition, because the isolation of two passages is limited, interchannel exists and crosstalks, and in formula, correction term C (L2X) representative is crosstalked and caused the correction value of performance change, and this value cannot be revised by measurement; LX (Y1) and LX (Y2) are the rotary joints for pitching of two single channel, owing to being Different Individual, even if by means such as pairings, be equally also difficult to guarantee that consistency is fine in the process of rotary work; LB (11) and LB (22) are that two passages output to the waveguide loss between the input of orientation rotation joint from transmitter, because this section of waveguide is generally long, link is many, although the length of two-way waveguide can be accomplished equally long, but performance is still difficult to guarantee the same, therefore cannot thinks simply and can cancel out each other.From operation result, cause that the factor of performance change is a lot, the performance of two-way is difficult to guarantee unanimously.
From formula (6), can find: existing full coherent dual polarization radar feeder system is due to the coexist lower end of feeder line, transceiver part, inevitably in orientation part, to use poor performance, the price two-way rotary joint of costliness again, in pitching, partly use the rotary joint of two single channel.Because transmitting-receiving is two-way, in passage, the difference of each part will expand and is twice (being multiplied by 2); And, cause the rotary joint that need to rotate when main devices that performance rises and falls is normal operation, be difficult in actual use revise.In addition, in formula (6), also do not consider the impact of the standing-wave ratio of above-mentioned device on performance.
Formula (5) and formula (6) are although be the loss error of calculating two passages, and also representative causes reason and the degree of error.For dual polarization radar, the consistency of two passages not only refers to loss, also comprises the impact on phase place.By formula (5) and formula (6), can analyze the phase error of two paths equally.
The error component that cannot eliminate in formula (6), current exactly in the industry for high-power two two the biggest problem that dual polarization radar cannot further improve detection performance of receiving of sending out.
In the utility model embodiment, can also adopt a kind of similar technical scheme, particularly, described orthogonal mode 3 and 15 of single channel pitching rotary joints arrange the first circulator 6, power splitter 7, the second circulator 8, horizontal branches receiver 12, vertical leg receiver 13 and frequency synthesizer 14; The first port of orthogonal mode 3 is connected with the second port of the first circulator 6, the second port of orthogonal mode 3 is connected with the second port of the second circulator 8, the 3rd port of the first circulator 6 is connected with horizontal branches receiver 12, the first port of the first circulator 6 is connected with the second port of power splitter 7, the 3rd port of the second circulator 8 is connected with vertical leg receiver 13, the first port of the second circulator 8 is connected with the 3rd port of power splitter 7, and the 4th port of the second circulator 8 is connected with the output of frequency synthesizer 14; The 4th port of described the first circulator 6 is connected with the second load 11 of described the first circulator 6 couplings.
The first port of power splitter 7 is connected with single channel pitching rotary joint 15, single channel pitching rotary joint 15 is connected with the second port of the 3rd circulator 17 by orientation single channel rotary joint 16, the 3rd port of the 3rd circulator 17 is connected with the input of time delay network 20 by microwave switch 18, the output of time delay network 20 is connected with the input of transmitter 10, and the output of transmitter 10 is connected with the first port of the 3rd circulator 17.
As shown in Figure 3, all right the third the similar technical scheme of the utility model, particularly, described orthogonal mode 3 and 15 of single channel pitching rotary joints arrange the first circulator 6, power splitter 7, the second circulator 8, horizontal branches receiver 12, vertical leg receiver 13 and frequency synthesizer 14 and the 4th circulator 22; The first port of orthogonal mode 3 is connected with the second port of the first circulator 6, the second port of orthogonal mode 3 is connected with the second port of the second circulator 8, the 3rd port of the first circulator 6 is connected with horizontal branches receiver 12, the first port of the first circulator 6 is connected with the second port of power splitter 7, the 3rd port of the second circulator 8 is connected with vertical leg receiver 13, and the first port of the second circulator 8 is connected with the 3rd port of power splitter 7; The first port of power splitter 7 is connected with the second port of the 4th circulator 22, and the 4th port of the 4th circulator 22 is connected with frequency synthesizer 14, and the first port of the 4th circulator 22 is connected with single channel pitching rotary joint 15;
Single channel pitching rotary joint 15 is connected with the second port of the 3rd circulator 17 by orientation single channel rotary joint 16, the 3rd port of the 3rd circulator 17 is connected with the input of time delay network 20 by microwave switch 18, the output of time delay network 20 is connected with the input of transmitter 10, and the output of transmitter 10 is connected with the first port of the 3rd circulator 17.
The 4th port of described the first circulator 6 is connected with the first load 9, and the 4th port of the second circulator 8 is connected with the second load 11, and the 3rd port of the 4th circulator 22 is connected with the 4th load 21.
In the utility model embodiment, the frequency synthesis signal that frequency synthesizer 14 sends is through the 4th circulator 22, single channel pitching rotary joint 15, orientation single channel rotary joint 16, the 3rd circulator 17, microwave switch 18 and time delay network 20 enter in transmitter 10, the HIGH-POWERED MICROWAVES signal of transmitter 10 outputs is through the 3rd circulator 17, orientation single channel rotary joint 16, single channel pitching rotary joint 15, the 4th circulator 22 enters power splitter 7, power splitter 7 is divided into two-way by signal, enter respectively in the first circulator 6 and the second circulator 8, enter again in orthogonal mode 3, orthogonal mode 3 is gone out the pulse microwave signal with polarization by antenna by Feed Horn 1 to spatial emission, to have completed the emission function of radar.In addition, the process that this embodiment receives can be with reference to above-mentioned process of carrying out signal reception.
Compare formula (5) and the technical solution of the utility model, can find that the beneficial effects of the utility model are: for powerful transmitter 10 in the time cannot being arranged on radar antenna, pass through the technical solution of the utility model: by setting up the 3rd circulator 17, microwave switch 18 and time delay network 20, after accurately controlling, reach frequency synthesis signal is sent to the object of transmitter 10 by transmitting feeder line passage from the position between single channel pitching rotary joint 15 and Feed Horn 1, thereby receiver and frequency synthesizer 14 can be arranged on to the position between single channel pitching rotary joint 15 and Feed Horn 1, the transmitter 10 that equipment amount is larger is arranged in radar host computer, in such hardware configuration mode, complete the work of full coherent dual polarization radar.
For radars such as full coherent dual-polarizations, can avoid using expensive but performance undesirable two orientation rotation joints, (many) roads and the pitching rotary joints of two single channel that must strictly match again, and only need select the rotary joint of two conventional single channel, 16 of single channel pitching rotary joint 15 and orientation single channel rotary joints are without " pairing ".
In addition, although this single channel pitching rotary joint 15 and orientation single channel rotary joint 16 all can cause equally performance to rise and fall to some extent because rotating when work, due to before power splitter 7 inputs, therefore, on the not impact of the consistency of two transmission channels.Receive path is owing to being arranged between single channel pitching rotary joint 15 and antenna, and, through above-mentioned single channel pitching rotary joint 15, orientation single channel rotary joint 16 and the transmission led compared with long wave, the consistency of two receive paths can fully not guarantee yet.By above-mentioned technological means, really can improve the overall performance of full coherent dual polarization radar, compact conformation, can reduce the quantity of pitching rotary joint, shorten the transmission range that receives feeder line, reduce the total losses of transmitting-receiving feeder line, improve the consistency of multichannel feeder line performance, improve detection performance, solved in the industry technical barrier for many years.
Claims (10)
1. the two high-power full coherent dual polarization radar feeder systems of two receipts of sending out of mechanical scan, comprise orthogonal mode (3), it is characterized in that: also comprise single channel pitching rotary joint (15), the first circulator (6), power splitter (7), the second circulator (8), horizontal branches receiver (12), vertical leg receiver (13) and frequency synthesizer (14) are set between described orthogonal mode (3) and single channel pitching rotary joint (15), the first port of orthogonal mode (3) is connected with the second port of the first circulator (6), the second port of orthogonal mode (3) is connected with the second port of the second circulator (8), the 3rd port of the first circulator (6) is connected with horizontal branches receiver (12), the 4th port of the first circulator (6) is connected with the output of frequency synthesizer (14), the first port of the first circulator (6) is connected with the second port of power splitter (7), the 3rd port of the second circulator (8) is connected with vertical leg receiver (13), the first port of the second circulator (8) is connected with the 3rd port of power splitter (7),
The first port of power splitter (7) is connected with single channel pitching rotary joint (15), single channel pitching rotary joint (15) is connected with the second port of the 3rd circulator (17) by orientation single channel rotary joint (16), the 3rd port of the 3rd circulator (17) is connected with the input of time delay network (20) by microwave switch (18), the output of time delay network (20) is connected with the input of transmitter (10), and the output of transmitter (10) is connected with the first port of the 3rd circulator (17).
2. the two high-power full coherent dual polarization radar feeder systems of two receipts of sending out of mechanical scan according to claim 1, is characterized in that: the 3rd port of described orthogonal mode (3) is connected with Feed Horn (1).
3. the two high-power full coherent dual polarization radar feeder systems of two receipts of sending out of mechanical scan according to claim 1, is characterized in that: the 4th port of described the second circulator (8) is connected with the second load (11).
4. the two high-power full coherent dual polarization radar feeder systems of two receipts of sending out of mechanical scan according to claim 1, is characterized in that: the 4th port of described the 3rd circulator (17) is connected with the 3rd load (19).
5. the two high-power full coherent dual polarization radar feeder systems of two receipts of sending out of mechanical scan according to claim 1, is characterized in that: the delay time of described time delay network (20) is not less than the pulse duration of the frequency synthesis signal of frequency synthesizer (14) generation.
6. the two high-power full coherent dual polarization radar feeder systems of two receipts of sending out of mechanical scan according to claim 1, is characterized in that: described the 3rd circulator (17) is positioned between transmitter (10) and orientation single channel rotary joint (16).
7. the two high-power full coherent dual polarization radar feeder systems of two receipts of sending out of mechanical scan, comprise orthogonal mode (3), it is characterized in that: also comprise single channel pitching rotary joint (15), the first circulator (6), power splitter (7), the second circulator (8), horizontal branches receiver (12), vertical leg receiver (13) and frequency synthesizer (14) are set between described orthogonal mode (3) and single channel pitching rotary joint (15), the first port of orthogonal mode (3) is connected with the second port of the first circulator (6), the second port of orthogonal mode (3) is connected with the second port of the second circulator (8), the 3rd port of the first circulator (6) is connected with horizontal branches receiver (12), the first port of the first circulator (6) is connected with the second port of power splitter (7), the 3rd port of the second circulator (8) is connected with vertical leg receiver (13), the first port of the second circulator (8) is connected with the 3rd port of power splitter (7), the 4th port of the second circulator (8) is connected with the output of frequency synthesizer (14),
The first port of power splitter (7) is connected with single channel pitching rotary joint (15), single channel pitching rotary joint (15) is connected with the second port of the 3rd circulator (17) by orientation single channel rotary joint (16), the 3rd port of the 3rd circulator (17) is connected with the input of time delay network (20) by microwave switch (18), the output of time delay network (20) is connected with the input of transmitter (10), and the output of transmitter (10) is connected with the first port of the 3rd circulator (17).
8. the two high-power full coherent dual polarization radar feeder systems of two receipts of sending out of mechanical scan according to claim 7, is characterized in that: the 4th port of described the first circulator (6) is connected with second load (11) of described the first circulator (6) coupling.
9. the two high-power full coherent dual polarization radar feeder systems of two receipts of sending out of mechanical scan, comprise orthogonal mode (3); It is characterized in that: also comprise single channel pitching rotary joint (15), the first circulator (6), power splitter (7), the second circulator (8), horizontal branches receiver (12), vertical leg receiver (13) and frequency synthesizer (14) and the 4th circulator (22) are set between described orthogonal mode (3) and single channel pitching rotary joint (15); The first port of orthogonal mode (3) is connected with the second port of the first circulator (6), the second port of orthogonal mode (3) is connected with the second port of the second circulator (8), the 3rd port of the first circulator (6) is connected with horizontal branches receiver (12), the first port of the first circulator (6) is connected with the second port of power splitter (7), the 3rd port of the second circulator (8) is connected with vertical leg receiver (13), and the first port of the second circulator (8) is connected with the 3rd port of power splitter (7); The first port of power splitter (7) is connected with the second port of the 4th circulator (22), and the 4th port of the 4th circulator (22) is connected with frequency synthesizer (14), and the first port of the 4th circulator (22) is connected with single channel pitching rotary joint (15);
Single channel pitching rotary joint (15) is connected with the second port of the 3rd circulator (17) by orientation single channel rotary joint (16), the 3rd port of the 3rd circulator (17) is connected with the input of time delay network (20) by microwave switch (18), the output of time delay network (20) is connected with the input of transmitter (10), and the output of transmitter (10) is connected with the first port of the 3rd circulator (17).
10. two pairs of mechanical scans according to claim 9 are received high-power full coherent dual polarization radar feeder systems, it is characterized in that: the 4th port of described the first circulator (6) is connected with the first load (9), the 4th port of the second circulator (8) is connected with the second load (11), and the 3rd port of the 4th circulator (22) is connected with the 4th load (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320471194.4U CN203423247U (en) | 2013-08-03 | 2013-08-03 | Mechanical scanning double transceiver type high-power coherent dual-polarization radar feeder system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320471194.4U CN203423247U (en) | 2013-08-03 | 2013-08-03 | Mechanical scanning double transceiver type high-power coherent dual-polarization radar feeder system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203423247U true CN203423247U (en) | 2014-02-05 |
Family
ID=50022337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320471194.4U Expired - Lifetime CN203423247U (en) | 2013-08-03 | 2013-08-03 | Mechanical scanning double transceiver type high-power coherent dual-polarization radar feeder system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203423247U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956535A (en) * | 2014-04-01 | 2014-07-30 | 涞水县涞磁凯立特磁业有限公司 | X-band quick switch capable of bearing high average power |
| CN110146892A (en) * | 2019-05-05 | 2019-08-20 | 湖南宜通华盛科技有限公司 | A kind of dual polarization radar |
| CN110515042A (en) * | 2019-08-29 | 2019-11-29 | 成都锦江电子系统工程有限公司 | Dual polarization radar antenna receives system |
| CN115425404A (en) * | 2022-09-02 | 2022-12-02 | 中国船舶集团有限公司第七二三研究所 | Front end highly integrated feeder structure |
-
2013
- 2013-08-03 CN CN201320471194.4U patent/CN203423247U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956535A (en) * | 2014-04-01 | 2014-07-30 | 涞水县涞磁凯立特磁业有限公司 | X-band quick switch capable of bearing high average power |
| CN103956535B (en) * | 2014-04-01 | 2016-05-04 | 涞水县涞磁凯立特磁业有限公司 | Can bear the X-band high-speed switch of high-average power |
| CN110146892A (en) * | 2019-05-05 | 2019-08-20 | 湖南宜通华盛科技有限公司 | A kind of dual polarization radar |
| CN110146892B (en) * | 2019-05-05 | 2023-08-01 | 浙江宜通华盛科技有限公司 | Dual-polarization radar |
| CN110515042A (en) * | 2019-08-29 | 2019-11-29 | 成都锦江电子系统工程有限公司 | Dual polarization radar antenna receives system |
| CN115425404A (en) * | 2022-09-02 | 2022-12-02 | 中国船舶集团有限公司第七二三研究所 | Front end highly integrated feeder structure |
| CN115425404B (en) * | 2022-09-02 | 2024-05-07 | 中国船舶集团有限公司第七二三研究所 | Front-end highly integrated feeder line structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203423247U (en) | Mechanical scanning double transceiver type high-power coherent dual-polarization radar feeder system | |
| CN203398259U (en) | Mechanical type scanning dual-transmitter dual-receiver large-power dual-polarization radar feed system | |
| WO2014121560A1 (en) | Intermodulation cancellation apparatus for passive component | |
| CN201600448U (en) | MWW (millimeter wave) coherent seeker front end device | |
| CN105467371A (en) | Amplitude phase calibrating device for semi-closed loop coupled phased array channels | |
| CN108562880A (en) | A kind of reflecting surface Spaceborne SAR System internal calibration network element and internal calibration method | |
| CN103399306B (en) | Method for reducing radar feed line loss and improving two-path feed line consistency | |
| CN110146892B (en) | Dual-polarization radar | |
| CN102128986B (en) | Method and device for detecting standing-wave ratio of radio frequency front-end product | |
| CN102393512A (en) | Single-antenna frequency-modulated continuous-wave radar radio frequency passive cancellation method | |
| CN204719233U (en) | A kind of target detection unit based on double-frequency laser | |
| CN104360328A (en) | Phased array radar transmitting channel far-field calibration method and system | |
| CN109557519B (en) | Large-scale phased array multichannel calibration circuit based on distribution mode | |
| CN203287518U (en) | Frequency-modulated continuous wave transmitting and receiving module | |
| CN103399305A (en) | Amplitude and phase calibration method for radio frequency channels of digital array secondary radar and antenna arrays | |
| CN102819015B (en) | Short-distance side-lobe frequency-modulated interrupted continuous-wave radar device | |
| CN102279397A (en) | Active frequency conversion type LFMCW radar distance-measuring device | |
| CN106533581B (en) | Active phased array antenna calibration method | |
| CN211856883U (en) | Radar receiver channel calibration device | |
| CN1983882A (en) | Radio-frequency front, system and method for measuring antenna feedback voltage resident wave ratio | |
| CN203423248U (en) | Mechanical scanning double transceiver type high-power intermediate-frequency coherent dual-polarization radar feeder system | |
| CN101410700A (en) | Waveguide junction having a decoupling element for planar waveguide couplings | |
| CN106646415B (en) | A kind of Polarization scattering meter preprocess method | |
| CN112985540A (en) | Split type guided wave radar level gauge based on gated frequency modulated continuous wave | |
| CN105337047B (en) | Coast defence search radar Slot-array antennas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140205 |
|
| CX01 | Expiry of patent term |