CN203398259U - Mechanical type scanning dual-transmitter dual-receiver large-power dual-polarization radar feed system - Google Patents
Mechanical type scanning dual-transmitter dual-receiver large-power dual-polarization radar feed system Download PDFInfo
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- CN203398259U CN203398259U CN201320471766.9U CN201320471766U CN203398259U CN 203398259 U CN203398259 U CN 203398259U CN 201320471766 U CN201320471766 U CN 201320471766U CN 203398259 U CN203398259 U CN 203398259U
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Abstract
The utility model relates to a mechanical type scanning dual-transmitter dual-receiver large-power dual-polarization radar feed system, comprising an antenna and a bridge-type rack fixed at the bottom part of the antenna. The end part of the bridge-type rack is provided with at least one casing, the casing is internally provided with a power emission unit, the power emission unit is connected with a first power divider, the first power divider is connected with a first circulator and a second circulator, and the first circulator and the second circulator are connected with an orthogonal mode in the bridge-type rack. The first annular device is in matched connection with a receiver in the casing through a first transmit-receive switch, and the second annular device is matched connection with the receiver in the casing through a second transmit-receive switch. The mechanical type scanning dual-transmitter dual-receiver large-power dual-polarization radar feed system is compact in structure, the usage of rotation joints is prevented, the transmission distance of a transmit-receive feed line is shortened, the total loss of the transmit-receive feed line is reduced, the consistency and detection performance of various feed lines is improved, and the mechanical type scanning dual-transmitter dual-receiver large-power dual-polarization radar feed system is wide in application range, safe and reliable.
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 dual polarization radar feeder systems, belong to the technical field of radar detection.
Background technology
In radar detection field, except all solid state radar is owing to adopting the less low power transmitter work of volume and weight, transceiver part can be arranged on to antenna upper outside, radar for pulsed transmitter, particularly pulsed dual polarization radar is in order to ensure the performance of surveying, and the power of radar transmitter, equipment amount are generally all very large, generally cannot be arranged on antenna, therefore must microwave signal be transferred to antenna by feeder systems such as waveguides, to go out to air-launched.During radar return signal, be also by feeder systems such as waveguides, microwave to be transmitted from antenna, and be transferred to receiver.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 (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.
Especially, 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 entirely differing radar, by frequency synthesizer, produce frequency synthesis signal, frequency synthesis signal inputs to transmitter, transmitter amplifies frequency synthesis signal, producing powerful microwave transmits the identical two-way microwave of microwave minute success rate by " power splitter ", and from the second port of power splitter, the 3rd port output, (the four port circulators of take shown in figure are example: between port, transmission characteristic is: the first port is to the second port for first port of every road microwave signal by " circulator 1 " and the first port input of " circulator 2 ", 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), from the second port of respective annular device, export again, by " orientation two-way rotary joint ", and through " horizontal branches pitching rotary joint " and " vertical leg pitching rotary joint ", be sent to the first port and second port of " orthogonal mode " respectively, orthogonal mode is exported the synthetic road of the two-way orthogonally polarized signal of input from the 3rd port, through Feed Horn, by antenna, the pulse microwave signal with polarization is gone out to spatial emission.
It during reception, is the inverse process in above-mentioned path, two-way echo-signal is inputted from the second port of circulator 1 and the second port of circulator 2 respectively, from the 3rd port output of respective annular device enter that two-way receiver amplifies, mixing, sampling and signal process, and completes the correlation function of full coherent dual polarization radar.
It is more than the transmitting procedure of its 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, 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 " must be with a two-way, 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 dual polarization radar feeder systems of two receipts of sending out, its compact conformation, can avoid using rotary joint, shorten transmitting-receiving feeder line transmission range, can reduce transmitting-receiving feeder line total losses, improve consistency and the detection performance of multichannel feeder line performance, wide accommodation, safe and reliable.
The technical scheme providing according to the utility model, described mechanical scan is two sends out two high-power dual polarization radar feeder systems of receiving, and comprises antenna and is fixed on the bridge type frame of described antenna bottom; Described bridge type Jia end at least arranges a casing, in described casing, be provided with power emission unit, described power emission unit is connected with the first power splitter, described the first power splitter is connected with the first circulator and the second circulator in casing respectively, and the first circulator, the second circulator are connected with the orthogonal mode in bridge type frame respectively; The first circulator is connected with the receiver coupling in casing by the first transmit-receive switch, and the second circulator is connected with the receiver coupling in casing by the second transmit-receive switch.
Pitching rotating shaft is set on described casing, and casing is positioned at the end of pitching rotating shaft.
In described casing, be provided with modulator, modulator is positioned at the below of power emission unit, the first power splitter is positioned at the top of power emission unit, and the first circulator and the second circulator are symmetrically distributed in the both sides of the first power splitter, and receiver is positioned at the top of the first power splitter.
Described power emission unit is klystron, travelling wave tube or magnetron.
Calibration signaling gear is set on described casing, described calibration signaling gear comprises signal source housing and is positioned at the signal source of described signal source housing, the output of described signal source is connected with the second power splitter, the second power splitter is connected with the coupled end of the first directional coupler and the coupled end of the second directional coupler respectively, the first directional coupler is connected with receiver coupling by the first circulator and the first transmit-receive switch, and the second directional coupler is connected with receiver coupling by the second circulator and the second transmit-receive switch.
Described antenna comprises Cassegrain antenna.
Described Cassegrain antenna comprises primary reflection surface antenna and is positioned at the subreflector antenna directly over described primary reflection surface antenna, and described subreflector antenna is installed on the top of primary reflection surface antenna by the antenna minor face strut on primary reflection surface antenna; Under subreflector antenna, be provided with Feed Horn, described Feed Horn is connected with orthogonal mode coupling.
Described power emission unit is connected with the first power splitter by transition waceguide; Described the first circulator is connected with orthogonal mode by first wave guide, the 3rd waveguide, the 5th waveguide, the first directional coupler, the 14 waveguide and the 7th waveguide respectively; The second circulator is connected with orthogonal mode by the second waveguide, the 4th waveguide, the 6th waveguide, the second directional coupler, the 15 waveguide and the 8th waveguide respectively.
Described Feed Horn is installed on the bottom in primary reflection surface antenna by feed waveguide stay pipe, and Feed Horn is connected with orthogonal mode by being positioned at the 9th waveguide of feed waveguide stay pipe.
Described signal source is connected with the second power splitter by the 13 waveguide and the 12 waveguide, the second power splitter is connected with the coupled end of the first directional coupler by the tenth waveguide, the second power splitter is connected with the coupled end of the second directional coupler by the 11 waveguide, and the load that coupling connects is also set on the second power splitter.
Advantage of the present utility model: in powerful power emission unit and receiver casing, thereby can avoid using longlyer between orientation and pitching rotary joint and radar host computer and antenna is connected waveguide, reduce the loss of transmitting-receiving feeder line, for dual polarization radar, guaranteed the consistency of two-way feeder line.In addition, due to the below of the transceiver overwhelming majority who arranges in casing in pitching rotating shaft, the element weight in casing and casing just can play the effect of counterweight, thereby can alleviate counterweight, is conducive to further reduce the overall weight of equipment.
Calibration signaling gear, except two waveguide bends connecting from orthogonal mode are different, other all waveguide is symmetrical connection all, is no matter that length or the quantity of waveguide is all consistent, and the length that waveguide connects is also relatively the shortest, be particularly suitable for high-power two utilization of sending out two acceptor dual polarization radars processed, compact conformation, shortens transmitting-receiving feeder line transmission range, can reduce transmitting-receiving feeder line total losses, improve detection performance, wide accommodation, safe and reliable.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of existing dual polarization radar feeder system.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is the left view of Fig. 2.
Fig. 4 be the utility model bridge type frame with casing between coordinate schematic diagram.
Fig. 5 is the utility model antenna and the schematic diagram that coordinates of bridge type frame.
Fig. 6 is the structural plan in the utility model casing.
Description of reference numerals: 1-casing, 2-pitching rotating shaft, 3-power emission unit, 4-transition waceguide, 5-the first power splitter, 6-the first circulator, 7-the second circulator, 8-first wave guide, 9-the second waveguide, 10-the 3rd waveguide, 11-the 4th waveguide, 12-the 5th waveguide, 13-the 6th waveguide, 14-the first transmit-receive switch, 15-the second transmit-receive switch, 16-receiver, 17-modulator, 18-orthogonal mode, 19-the 7th waveguide, 20-the 8th waveguide, 21-the 9th waveguide, 22-Feed Horn, 23-feed waveguide stay pipe, 24-subreflector antenna, 25-primary reflection surface antenna, 26-antenna minor face strut, 27-load, 28-the second power splitter, 29-the tenth waveguide, 30-the 11 waveguide, 31-the first directional coupler, 32-the second directional coupler, 33-the 12 waveguide, 34-the 13 waveguide, 35-signal source, 36-the 14 waveguide, 37-the 15 waveguide, 38-bridge type frame and 39-signal source housing.
Embodiment
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6: in order to avoid using rotary joint, shorten transmitting-receiving feeder line transmission range, can reduce transmitting-receiving feeder line total losses, improve consistency and the detection performance of multichannel feeder line performance, the utility model comprises antenna and is fixed on the bridge type frame 38 of described antenna bottom; Described bridge type Jia38 end at least arranges a casing 1, in described casing 1, be provided with power emission unit 3, described power emission unit 3 is connected with the first power splitter 5, described the first power splitter 5 is connected with the first circulator 6 and the second circulator 7 in casing 1 respectively, and the first circulator 6, the second circulator 7 are connected with the orthogonal mode 18 in bridge type frame 8 respectively; The first circulator 6 is connected with receiver 16 couplings in casing 1 by the first transmit-receive switch 14, and the second circulator 7 is connected with receiver 16 couplings in casing 1 by the second transmit-receive switch 15.
Particularly, in existing radar feed system, bridge type Jia38 both ends are connected with pitching support respectively, and pitching support is that pitching power transmission shaft 2 connects, and drives the rotation of support, to complete the pitching scanning motion of antenna by the rotation of pitching power transmission shaft 2.Wherein, pitching support is only the effect with support, transition and counterweight.In the utility model embodiment, by at least one casing 1 being set in bridge type Jia38 end, by at the interior transmitting that radar is set of casing 1, reception and corresponding feeder line, casing 1 is between radar pitching rotary joint and antenna feed loudspeaker 22, can avoid using orientation rotary joint and pitching rotary joint, in the application process of dual polarization radar, play and reduce equipment amount, elimination orientation rotation joint and pitching rotary joint and the adverse effect of corresponding waveguide to transmitting-receiving feeder line.
In the utility model embodiment, on described casing 1, pitching rotating shaft 2 is set, casing 1 is positioned at the end of pitching rotating shaft 2.When bridge type Jia38 end arranges two casings 1, described two casings 1 are symmetrically distributed in the end of pitching rotating shaft 2, and bridge type frame 38 is fixedly connected with casing 1, and pitching rotating shaft 2 can drive casing 1 to carry out required pitching scanning motion.
Further, power emission unit 3 is positioned at the below of pitching rotating shaft 2, in described casing 1, be provided with modulator 17, modulator 17 is positioned at the below of power emission unit 3, the first power splitter 5 is positioned at the top of power emission unit 3, the first circulator 6 and the second circulator 7 are symmetrically distributed in the both sides of the first power splitter 5, and receiver 16 is positioned at the top of the first power splitter 5.
Described power emission unit 3 is klystron, travelling wave tube or magnetron; Particularly, for full phase parameter radar, power emission unit 3 is klystron or travelling wave tube etc., for intermediate frequency coherent and normal radar, can be magnetron, and power emission unit 3 is transmitter.
In the utility model embodiment, the Cassegrain antenna of take describes as example, described Cassegrain antenna comprises primary reflection surface antenna 25 and is positioned at the subreflector antenna 24 directly over described primary reflection surface antenna 25, and described subreflector antenna 24 is installed on the top of primary reflection surface antenna 25 by the antenna minor face strut 26 on primary reflection surface antenna 25; Under subreflector antenna 24, be provided with Feed Horn 22, described Feed Horn 22 is connected with orthogonal mode 18 couplings.
The bottom that described Feed Horn 22 is installed in primary reflection surface antenna 25 by feed waveguide stay pipe 23, Feed Horn 22 is connected with orthogonal mode 18 by being positioned at the 9th waveguide 21 of feed waveguide stay pipe 23.Orthogonal mode 18 is positioned at the bottom of primary reflection surface antenna 25 and bridge type Jia38 center, and orthogonal mode 18 provides the independent transmitting-receiving of orthogonally polarized wave, guarantees the isolation of two POLARIZATION CHANNEL.
Radar antenna used is Cassegrain antenna, and orthogonal mode 18 is arranged on the bottom centre position of Cassegrain antenna primary reflection surface 25, and of polarizing in input ports is parallel with pitching rotating shaft 2, another is vertical with pitching rotating shaft 2 for two of its quadrature.The synthetic output port of polarization of orthogonal mode 18 is connected with Feed Horn 22 by the 9th waveguide 21, can allow the connection waveguide of feeder line symmetrical and the shortest, is conducive to improve the indices of two-way feeder line.
For Cassegrain antenna, the microwave that Feed Horn 22 is launched reflexes to primary reflection surface antenna 25 through subreflector antenna 24, and primary reflection surface antenna 25 is gone out microwave again to aerial directional transmissions.
During reception, be the opposite direction of said process, orthogonal mode 18 by antenna reception to the echo with dual-polarization signal resolve into two paths of signals, from channel of polarization separately, transmit downwards; When echo arrives the first circulator 6 and the second circulator 7, the signal receiving is transmitted to respectively to receiver 16, by the first transmit-receive switch 14 and the second transmit-receive switch 15 be transferred to that receiver separately amplifies, the operation such as mixing, sampling and signal processing.Described the first transmit-receive switch 14, the second transmit-receive switch 15 can adopt discharge tube or PIN pipe.
Particularly, described power emission unit 3 is connected with the first power splitter 5 by transition waceguide 4; Described the first circulator 6 is connected with orthogonal mode 18 by first wave guide 8, the 3rd waveguide 10, the 5th waveguide 12, the first directional coupler the 31, the 14 waveguide 36 and the 7th waveguide 19 respectively; The second circulator 7 is connected with orthogonal mode 18 by the second waveguide 9, the 4th waveguide 11, the 6th waveguide 13, the second directional coupler the 32, the 15 waveguide 37 and the 8th waveguide 20 respectively.In the utility model embodiment, for intermediate frequency coherent radar transition waceguide 4, can replace by device by getting.
On described casing 1, calibration signaling gear is set, described calibration signaling gear comprises signal source housing 39 and is positioned at the signal source 35 of described signal source housing 39, the output of described signal source 35 is connected with the second power splitter 28, the second power splitter 28 is connected with the coupled end of the first directional coupler 31 and the coupled end of the second directional coupler 32 respectively, the first directional coupler 31 is connected with receiver 16 couplings by the first circulator 6 and the first transmit-receive switch 14, and the second directional coupler 32 is connected with receiver 16 couplings by the second circulator 7 and the second transmit-receive switch 15.
Described signal source 35 is connected with the second power splitter 28 by the 13 waveguide 34 and the 12 waveguide 33, the second power splitter 28 is connected with the coupled end of the first directional coupler 31 by the tenth waveguide 29, the second power splitter 28 is connected with the coupled end of the second directional coupler 32 by the 11 waveguide 30, and the load 27 that coupling connects is also set on the second power splitter 28.
When opening, calibration function do not open high pressure, 35 work of control signal source, signal source 35 is by the 13 waveguide 34, the 12 waveguide 33 is sent to the second power splitter 28 by calibration signal, load 27 is matched loads of the second power splitter 28, the identical two-way calibration signal of the second power splitter 28 outputs passes through respectively the tenth waveguide 29, the 11 waveguide 30 is sent to the coupled end of the first directional coupler 31 and the second directional coupler 32, by coupled end, enter directional coupler separately, by corresponding directional coupler, be input to the 5th waveguide 12 and the 6th waveguide 13, the same receiver 16 that enters into of flow process of this two paths of signals and the above-mentioned echo-signal receiving, calibration by system that the employing of signal is finished dealing with is worked, be beneficial to two-way feeder line and Receiving machine are carried out to calibration and monitoring, guarantee the stability of system.
Above-mentioned transmitting and receiving in process, with conventional scheme comparison, receiving and transmitting signal flow process is not passed 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 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.
Variation to the transmitting-receiving feeder loss of the utility model embodiment is 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)=LG(12)+LH(1)+LZ(13)+LB(ZF1)；
Lf(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.LG (ij) be power splitter from i port to the loss j port, can all be equivalent to LG.LZ (lk) be orthogonal mode 18 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.Meanwhile, 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)=2LH+LG+2LZ+2LB （1）
Lfs(y)=2LH+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 radar feed 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)；
Wherein: LB (1) is for exporting to the loss of orientation rotation joint input waveguide part from transmitter; LX (F) is the loss in orientation rotation joint, can all be equivalent to LX.LX (Y) is the loss of pitching rotary joint, can all be equivalent to LX.
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 horizontal and vertical passage exports to the loss of orientation rotation joint input waveguide part from transmitter.L2X (F1), L2X (F2) are respectively the losses of the orientation rotation joint horizontal and vertical passage of two-way.
Formula (1), formula (2) and formula (3), formula (4) are compared to discovery (take horizontal channel as example):
Lfs(x_old)－Lfs(x)=2{LB(11)+L2X(F1) +LX}
In operation result: LB (11) is that horizontal channel exports to from transmitter the loss that orientation rotation joint input long wave is led part, and L2X (F1) is the loss of the horizontal channel, orientation rotation joint of two-way, and LX is the loss of pitching rotary joint.Therefore, the transmitting-receiving feeder loss of traditional scheme is far longer than this programme.
The loss of above-mentioned feeder line except to radar range, survey the ability of small and weak echo influential, mainly also have influence on the consistency of 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 because connecting not only symmetry but also very short of 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.
For existing radar feed 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, the performance of two-way is difficult to guarantee unanimously.
From formula (6), can find: existing radar feed system is due to the coexist lower end of feeder line, transceiver part, inevitably in orientation part, will use poor performance, price expensive two-way rotary joint 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.Compare formula (5) and the technical solution of the utility model, can find that the beneficial effects of the utility model are: due to by powerful power emission unit 3 and receiver 16 casings 1, thereby can avoid using longlyer between orientation and pitching rotary joint and radar host computer and antenna is connected waveguide, reduce the loss of transmitting-receiving feeder line, for dual polarization radar, guaranteed the consistency of two-way feeder line.In addition, due to the transceiver overwhelming majority of the casing 1 interior setting below in pitching rotating shaft, the element weight in casing 1 and casing 1 just can play the effect of counterweight, thereby can alleviate counterweight, is conducive to further reduce the overall weight of equipment.
Calibration signaling gear, except two waveguide bends from orthogonal mode 18 connections are different, other all waveguide is symmetrical connection all, the length or the quantity that are no matter waveguide are all consistent, and the length that waveguide connects is also relatively the shortest, be particularly suitable for high-power two utilization of sending out two acceptor dual polarization radars processed, solved in the industry technical barrier for many years.
Claims (10)
1. mechanical scan is two sends out two high-power dual polarization radar feeder systems of receiving, and comprises antenna and is fixed on the bridge type frame (38) of described antenna bottom; It is characterized in that: the end of described bridge type frame (38) at least arranges a casing (1), in described casing (1), be provided with power emission unit (3), described power emission unit (3) is connected with the first power splitter (5), described the first power splitter (5) is connected with the first circulator (6) and the second circulator (7) in casing (1) respectively, and the first circulator (6), the second circulator (7) are connected with the orthogonal mode (18) in bridge type frame (8) respectively; The first circulator (6) is connected with receiver (16) coupling in casing (1) by the first transmit-receive switch (14), and the second circulator (7) is connected with receiver (16) coupling in casing (1) by the second transmit-receive switch (15).
2. the two high-power dual polarization radar feeder systems of two receipts of sending out of mechanical scan according to claim 1, is characterized in that: pitching rotating shaft (2) is set on described casing (1), and casing (1) is positioned at the end of pitching rotating shaft (2).
3. two pairs of mechanical scans according to claim 1 are received high-power dual polarization radar feeder systems, it is characterized in that: in described casing (1), be provided with modulator (17), modulator (17) is positioned at the below of power emission unit (3), the first power splitter (5) is positioned at the top of power emission unit (3), the first circulator (6) and the second circulator (7) are symmetrically distributed in the both sides of the first power splitter (5), and receiver (16) is positioned at the top of the first power splitter (5).
4. the two high-power dual polarization radar feeder systems of two receipts of sending out of mechanical scan according to claim 1, is characterized in that: described power emission unit (3) is klystron, travelling wave tube or magnetron.
5. two pairs of mechanical scans according to claim 1 are received high-power dual polarization radar feeder systems, it is characterized in that: described casing arranges calibration signaling gear on (1), described calibration signaling gear comprises signal source housing (39) and is positioned at the signal source (35) of described signal source housing (39), the output of described signal source (35) is connected with the second power splitter (28), the second power splitter (28) is connected with the coupled end of the first directional coupler (31) and the coupled end of the second directional coupler (32) respectively, the first directional coupler (31) is connected with receiver (16) coupling by the first circulator (6) and the first transmit-receive switch (14), the second directional coupler (32) is connected with receiver (16) coupling by the second circulator (7) and the second transmit-receive switch (15).
6. the two high-power dual polarization radar feeder systems of two receipts of sending out of mechanical scan according to claim 1, is characterized in that: described antenna comprises Cassegrain antenna.
7. two pairs of mechanical scans according to claim 6 are received high-power dual polarization radar feeder systems, it is characterized in that: described Cassegrain antenna comprises primary reflection surface antenna (25) and be positioned at the subreflector antenna (24) directly over described primary reflection surface antenna (25), described subreflector antenna (24) is installed on the top of primary reflection surface antenna (25) by the antenna minor face strut (26) on primary reflection surface antenna (25); Under subreflector antenna (24), be provided with Feed Horn (22), described Feed Horn (22) is connected with orthogonal mode (18) coupling.
8. the two high-power dual polarization radar feeder systems of two receipts of sending out of mechanical scan according to claim 1, is characterized in that: described power emission unit (3) is connected with the first power splitter (5) by transition waceguide (4); Described the first circulator (6) is connected with orthogonal mode (18) by first wave guide (8), the 3rd waveguide (10), the 5th waveguide (12), the first directional coupler (31), the 14 waveguide (36) and the 7th waveguide (19) respectively; The second circulator (7) is connected with orthogonal mode (18) by the second waveguide (9), the 4th waveguide (11), the 6th waveguide (13), the second directional coupler (32), the 15 waveguide (37) and the 8th waveguide (20) respectively.
9. two pairs of mechanical scans according to claim 7 are received high-power dual polarization radar feeder systems, it is characterized in that: described Feed Horn (22) is installed on the bottom in primary reflection surface antenna (25) by feed waveguide stay pipe (23), and Feed Horn (22) is connected with orthogonal mode (18) by being positioned at the 9th waveguide (21) of feed waveguide stay pipe (23).
10. two pairs of mechanical scans according to claim 5 are received high-power dual polarization radar feeder systems, it is characterized in that: described signal source (35) is connected with the second power splitter (28) by the 13 waveguide (34) and the 12 waveguide (33), the second power splitter (28) is connected with the coupled end of the first directional coupler (31) by the tenth waveguide (29), the second power splitter (28) is connected with the coupled end of the second directional coupler (32) by the 11 waveguide (30), and the load (27) that coupling connects is also set on the second power splitter (28).
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105470646A (en) * | 2015-12-10 | 2016-04-06 | 成都绿迪科技有限公司 | Communication antenna |
| CN108196236A (en) * | 2017-12-13 | 2018-06-22 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Automatic removing method and harmonic radar are adjudicated and interfered to fuzzy logic based on study |
| CN108361510A (en) * | 2018-03-12 | 2018-08-03 | 桂林理工大学 | Feedback device is watched in a kind of day that ultralight high intensity is highly integrated |
| CN109683162A (en) * | 2018-12-24 | 2019-04-26 | 中国电子科技集团公司第二十研究所 | A kind of high-power pathfinder based on microwave magnetron optics coherence tomography |
| CN109755767A (en) * | 2018-10-19 | 2019-05-14 | 上海航天测控通信研究所 | Eight frequency range Dual-polarized single pulse dual reflector antennas |
| 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 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470646A (en) * | 2015-12-10 | 2016-04-06 | 成都绿迪科技有限公司 | Communication antenna |
| CN108196236A (en) * | 2017-12-13 | 2018-06-22 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Automatic removing method and harmonic radar are adjudicated and interfered to fuzzy logic based on study |
| CN108196236B (en) * | 2017-12-13 | 2020-11-06 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Learning-based fuzzy logic decision and interference automatic elimination method and harmonic radar |
| CN108361510A (en) * | 2018-03-12 | 2018-08-03 | 桂林理工大学 | Feedback device is watched in a kind of day that ultralight high intensity is highly integrated |
| CN108361510B (en) * | 2018-03-12 | 2023-10-03 | 桂林理工大学 | Ultra-light high-strength high-integration antenna servo device |
| CN109755767A (en) * | 2018-10-19 | 2019-05-14 | 上海航天测控通信研究所 | Eight frequency range Dual-polarized single pulse dual reflector antennas |
| CN109683162A (en) * | 2018-12-24 | 2019-04-26 | 中国电子科技集团公司第二十研究所 | A kind of high-power pathfinder based on microwave magnetron optics coherence tomography |
| 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 |
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