CN103675802B - The system and method for high powered radar proximity detection is realized with two-way feeder line - Google Patents
The system and method for high powered radar proximity detection is realized with two-way feeder line Download PDFInfo
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- CN103675802B CN103675802B CN201310700510.5A CN201310700510A CN103675802B CN 103675802 B CN103675802 B CN 103675802B CN 201310700510 A CN201310700510 A CN 201310700510A CN 103675802 B CN103675802 B CN 103675802B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
- G01S7/032—Constructional details for solid-state radar subsystems
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Abstract
The present invention relates to a kind of detection system and method, especially a kind of system and method that high powered radar proximity detection is realized with two-way feeder line, belongs to the technical field of radar detection.According to the technical scheme that the present invention is provided, the system that high powered radar proximity detection is realized with two-way feeder line, including radar antenna and the transmitting-receiving feeder-path positioned at the radar antenna focal point；The transmitting-receiving feeder-path includes the transmitting-receiving feed positioned at radar antenna focal point；Set in the focal point of the neighbouring radar antenna and at least receive feeder-path all the way, the reception feeder-path includes the reception feed of neighbouring radar antenna focal point, the reception feed is connected by receiving feeder line with the second receiver.The present invention is simple and compact for structure, can realize to effective detection closely, reduces detection cost, and wide adaptation range is safe and reliable.
Description
Technical field
Realize high powered radar closely the present invention relates to a kind of detection system and method, especially one kind two-way feeder line
The system and method for detection, belongs to the technical field of radar detection.
Background technology
In radar detection field, particularly when radar transmitter works in a pulsed fashion, in order to realize having to target
Effect detection, the transmitter power of radar will not typically be made too small, and transmit-receive switch, electric discharge are inherently set in receiver inlet
Pipe（Or PIN pipes）, the microwave limiter part such as high power amplitude limiter, for protecting the not compromised transmission power for coming of receiver
Burn.There is one " recovery time " in the microwave device of above-mentioned protection, i.e., can time delay after the powerful transmitting pulse past
A period of time could recover the conducting state of passage, although this period can be very short, but can there is a C*（τ+△T）/ 2 spy
Survey blind area（C：The light velocity, τ：Fire pulse width, △ T：Recovery time）, therefore cannot just accomplish to C* in theory（τ+△T）/
The detection of target in 2 this section of point blanks.
In order to realize proximity detection, two-antenna scheme can only be often used（Detected with continuous wave and do not ground in this case
The scope studied carefully）.Usually, two-antenna scheme includes number one antenna and No. second antenna, and radar is realized with number one antenna
Transmitting and the effect for receiving（Signal beyond measurable blind area in theory）, echo is received with No. second antenna.Due to No. second
Antenna non-emissive function, therefore can there is the microwave device of " recovery time " without setting in receiving channel, in theory
Detection closely can just be realized.
But the scheme of above-mentioned double antenna there are problems that a lot：1）, need two slave antennas, complex structure, high cost；2）、
In order to ensure basic detection performance, antenna can not possibly be made it is too small, so result between target and two slave antennas exist one
Angle, as the nearlyer angle of distance is bigger.In order to ensure detection performance, antenna is necessarily formed with very strong directionality.For
Target closely, the microwave energy that No. second antenna is received may not increase, and certainty of measurement to angle can also
Decline.Therefore, the performance that two-antenna scheme is detected to point blank is on the contrary to decline.
In addition, in some particular applications, such as realizing the detection to insect with radar, required antenna ripple toward contact
Beam makes conical scanning mode, and the speed of conical scanning can be very high, and the angle of conical scanning has strict demand, this
If demand two-antenna scheme is difficult to implement in engineering.
The content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided one kind two-way feeder line realizes high-power thunder
Up to the system and method for proximity detection, its is simple and compact for structure, can realize that, to effective detection closely, reduction is detected into
This, wide adaptation range is safe and reliable.
It is described to be with what two-way feeder line realized high powered radar proximity detection according to the technical scheme that the present invention is provided
System, including radar antenna and the transmitting-receiving feeder-path positioned at the radar antenna focal point；The transmitting-receiving feeder-path includes position
In the transmitting-receiving feed of radar antenna focal point；Feeder line is at least received all the way in the focal point setting of the neighbouring radar antenna to lead to
Road, the reception feeder-path includes the reception feed of neighbouring radar antenna focal point, and the reception feed is by receiving feeder line
It is connected with the second receiver.
The transmitting-receiving feeder-path also includes transmit-receive switch, emitter, limiter and the first receiver, and transmit-receive switch passes through
Transmitting-receiving feeder line is connected with transmitting-receiving feed, and transmit-receive switch is connected with emitter, and transmit-receive switch passes through limiter and the first receiver
Input connection.
When the emitter carries out signal transmitting by receiving and dispatching feed, the second receiver is by receiving feed and receiving feeder line
The power for receiving signal is not more than the power that the second receiver can bear.
The radar antenna includes feed-forward type radar antenna, Feed-backward type radar antenna or offset-feed type radar antenna.
A kind of similar technical scheme, the system that high powered radar proximity detection is realized with two-way feeder line, including
Radar antenna and the transmitting-receiving feeder-path positioned at the radar antenna focal point；The transmitting-receiving feeder-path includes being located at radar day
Transmitting-receiving feed at line focus；Set in the focal point of the neighbouring radar antenna and at least receive feeder-path all the way, it is described to connect
Receiving feeder-path includes the reception feed of neighbouring radar antenna focal point, and the reception feed is gated by receiving feeder line and microwave
Switch and be connected with the input of the first receiver in transmitting-receiving feeder-path.
The input of first receiver by microwave gating switch also with transmitting-receiving feeder-path limiter output
End connection, the input of limiter is connected with transmit-receive switch, and transmit-receive switch is connected with emitter, and transmit-receive switch is by receiving and dispatching feeder line
It is connected with transmitting-receiving feed.
A kind of method that high powered radar proximity detection is realized with two-way feeder line, the method for the proximity detection includes
Following steps：
A, radar antenna focal point set transmitting-receiving feeder-path, and radar antenna focal point set at least all the way
Feeder-path is received, the reception feeder-path includes receiving feed and receives feeder line, receives feed by receiving feeder line and connecing
Receipts machine system is connected；
, by receiving and dispatching feed to radar antenna microwave radiation energy, radar antenna will be big for b, the emitter of transmitting-receiving feeder-path
The microwave energy of power radiate to spatial orientation；
C, when by after the fire pulse width that emitter launches highpowerpulse signal and reach transmitting-receiving feeder line lead to
Before the recovery time of the limiter in road, the microwave signal that radar antenna is reflected is received by receiving feed, and by receiving
The echo-signal that feeder line will receive feed reception is transmitted to the signal processing terminal system by receiver system, to realize to low coverage
From the detection of target；
D, when by after the recovery time of limiter, the microwave that radar antenna is reflected being received by receiving and dispatching feeder-path
Signal, is transmitted to the signal processing terminal system the echo-signal of reception by receiver system by limiter, right to realize
The detection of required distance objective.
The receiver system includes the first receiver and the second receiver, receives feed and is connect with second by receiving feeder line
The input connection of receipts machine, the input connection limiter of the first receiver, limiter is connected with transmit-receive switch, transmit-receive switch and
Emitter is connected, and transmit-receive switch is connected by receiving and dispatching feeder line with transmitting-receiving feed.
The transmitting-receiving feed and reception feed rotate at a high speed around same axle, obtain to receive and dispatch feed as the transmitting-receiving wave beam of passage
Conical scanning, and with receive feed as passage reception wave beam conical scanning.
In the step d, the microwave signal that radar antenna is reflected is being received by receiving and dispatching feeder-path, by amplitude limit
Device transmits while to the signal processing terminal system the echo-signal of reception by receiver system, the signal processing terminal system
Also receive by receiving feed, receiving the echo-signal that feeder line is transmitted.
Advantages of the present invention：On the premise of sharing with common antenna, feeder-path is at least received all the way by setting, keep away
Exempt from, using the limiter for shielding, to realize the detection to point blank target；The reception of feeder-path is received by setting
The locus of feed, Reasonable adjustment receives the angle that wave beam deviates antenna normal direction, and is done jointly with transmitting-receiving feeder-path
The technological means of conical scanning, realizes the effective detection to closely moving target characteristic, can solve high powered radar detection
The excessive technical barrier in blind area, improves the detectivity to point blank target, can also be reduced while detection performance is improved
Cost, simple and compact for structure, wide adaptation range is safe and reliable.
Brief description of the drawings
Fig. 1 implements structure chart for a kind of of inventive receiver system.
Fig. 2 implements structure chart for the another of inventive receiver system.
Fig. 3 is schematic diagram of the present invention when conical scanning Industrial detection is carried out.
Description of reference numerals：1- antennas, 2- transmitting-receivings feed, 3- transmitting-receivings feeder line, 4- transmit-receive switches, 5- emitters, 6- amplitude limits
Device, the receivers of 7- first, 8- receive feed, 9- and receive feeder line, the receivers of 10- second and 11- microwave gating switches.
Specific embodiment
With reference to specific drawings and Examples, the invention will be further described.
As shown in Figure 1：In order to realize target acquisition closely, the present invention includes radar antenna 1 and positioned at the radar
The transmitting-receiving feeder-path of the focal point of antenna 1；The transmitting-receiving feeder-path includes the transmitting-receiving feed 2 positioned at the focal point of radar antenna 1；
Set in the focal point of the neighbouring radar antenna 1 and at least receive feeder-path all the way, the reception feeder-path includes neighbouring
The reception feed 8 of the focal point of radar antenna 1, the reception feed 8 is connected by receiving feeder line 9 with the second receiver 10.
Specifically, the transmitting-receiving feeder-path also includes transmit-receive switch 4, emitter 5, the receiver 7 of limiter 6 and first,
Transmit-receive switch 4 is connected by receiving and dispatching feeder line 3 with transmitting-receiving feed 2, and transmit-receive switch 4 is connected with emitter 5, and transmit-receive switch 4 passes through
Limiter 6 is connected with the input of the first receiver 7.
In order to ensure radar is to the detection performance of distant object, often in the focal point setting transmitting-receiving feedback of radar antenna 1
Source 2, the highpowerpulse signal that emitter 5 is launched is after transmit-receive switch 4, transmitting-receiving feeder line 3 output to transmitting-receiving feed 2 to radar
To spatial orientation radiate powerful microwave energy again by the microwave radiation energy of antenna 1, radar antenna 1.When in reception
During state, most of energy centralization that radar antenna 1 will be received to focal point, the transmitting-receiving feed 2 for being arranged on focal point can connect
The most of energy for converging near focal point is received, by receiving and dispatching the secondary device 6 of feeder line 3, transmit-receive switch 4, limit, first is finally delivered to
Receiver 7 is amplified, and the echo information that the first receiver 7 will be obtained is transferred to the signal processing terminal system, at signal
After the echo information treatment that reason terminal system is transmitted to the first receiver 7, the detection mission to target is completed.Above-mentioned transmitting-receiving process
It is the detection method of normal radar, can effectively detect distance is：C*（τ+△T）Echo beyond/2 blind areas.
Further, when the emitter 5 carries out signal transmitting by receiving and dispatching feed 2, the second receiver 10 is by receiving
The power that feed 8 and reception feeder line 9 receive signal is not more than the power that the second receiver 10 can bear.
When the near focal point in radar antenna 1 sets reception feed 8 again, by receiving the receiver 10 of feeder line 9 and second
Connection, during emitter 5 is launched, due to receiving feeder-path and receiving and dispatching feeder-path not in same branch road, is coupled to
The power P of the input of the second receiver 10MFor：
PM=[PS*(SJ/S)*K1+PH]*K0
Wherein：PSPower for radar antenna 1 to spatial orientation transmitting microwave in Antenna aperture equivalent area.SJTo connect
Receive power projection area of the feed 8 in Antenna aperture.S is the power projection area of Antenna aperture.K1To receive 8 pairs of days of feed
The reception coefficient of the microwave of line mouthful surface launching.PHIt is to include that transmitting-receiving feed 2, transmitting-receiving feeder line 3,5 pairs, emitter receive feed 8 and pass through
The microwave power of Space Coupling.K0To receive the loss factor of feeder line 9.
It is with the power projection area ratio of Antenna aperture due to receiving power projection area of the feed 8 in Antenna aperture
Very little, the power [P being coupled toS*(SJ/S)*K1] it is little.For the power P of Space CouplingHIt is also very little, and
Total power can also be by receiving the loss factor K of feeder line 90To adjust, therefore may insure completely in the transmitting phase of emitter 5
Between be input to the power of the input of the second receiver 10 less than or equal to the power that the second receiver 10 can bear, such that it is able to
Without the MICROWAVE PROTECTION device for setting amplitude limit device class, it is to avoid occur " recovery time " occur to hinder the in transmitting-receiving feeder-path
The situation that one receipts machine connects 7 reception signals occurs.Receiving feed 8 can be directly connected by receiving feeder line 9 with the first receiver 10.When
The microwave signal that can be just reflected by the reception antenna of the second receiver 10 after the fire pulse width τ times, therefore
Only have detection range aspect blind area：C*τ/2.
When receiving the reception signal of feed 8, the echo signal power P of the second receiver 10 is input toin：
Pin= Pi* K2* K0
Wherein：PiFor the echo power that radar antenna 1 is received；K2To receive the reception coefficient of feed 8.
Although the echo power that radar antenna 1 is received is largely focused on the focal point of radar antenna, it is actually
One " power spot " with certain area of focal point is concentrated on, feed 8 is received and is just arranged near transmitting-receiving feed 2, connect
The reception coefficient for receiving feed 8 will not be too small.And with the various attenuation ratios of the echo of maximum distance compared with receiving coefficient and be far longer than
Remote echo attenutation, closely the reflection power of echo is also very strong, it can be ensured that be input to the echo of the second receiver 10
Signal power PinThe sensitivity of the second receiver 10 is far longer than, therefore, it can effectively detect target closely.
This state blind area reduces C* △ T/2 compared with normal radar.Such as, when the fire pulse width of emitter 5
It is 0.1 μ s, " recovery time " of the limiter 6 for shielding is 2 μ s, then existing radar detection just cannot be to 315m models
Target in enclosing is detected, but when being detected by the scheme of the embodiment of the present invention, so that it may detect the target outside 15m
（Only it is detection blind area that fire pulse width causes）.
Although the distance of C* △ T/2（It is 300m in examples detailed above）The detection range total to radar seems insignificant, but
It is critically important in many special application scenarios.Such as, insect detection radar is when antenna is detected vertically upward, due to major part
Distribution of insects cannot be detected in low-latitude flying by original Detection Techniques, will lose many echo informations.
In the embodiment of the present invention, the radar antenna 1 includes feed-forward type radar antenna, Feed-backward type radar antenna or offset-feed type
Radar antenna.
As shown in Figure 2：Further, the present invention includes radar antenna 1 and the transmitting-receiving positioned at the focal point of the radar antenna 1
Feeder-path；The transmitting-receiving feeder-path includes the transmitting-receiving feed 2 positioned at the focal point of radar antenna 1；In the neighbouring radar day
The focal point of line 1 sets and at least receives feeder-path all the way, and the reception feeder-path includes the neighbouring focal point of radar antenna 1
Feed 8 is received, the reception feed 8 connects by receiving feeder line 9 and microwave gating switch 11 with first in transmitting-receiving feeder-path
The input connection of receipts machine 7.
The microwave gating switch 11 can be the selector of multiselect one, and receiving the echo information that receives of feeder-path can be with
The signal processing terminal system is transferred to by the first receiver 7, the echo information that transmitting-receiving feeder-path will can also be received is led to
Cross the first receiver 7 and be transferred to the signal processing terminal system.The signal processing terminal system can use existing radar detection
The signal handling equipment commonly used in system, here is omitted.When the first receiver 7 is presented by microwave gating switch 11 with reception
Source 8, reception feeder line 9 are connected, and when receiving echo-signal, the first receiver 7 is received by receiving feed 8 and receiving feeder line 9
The power of signal is not more than the power that the first receiver 7 can bear, illustrate may be referred to it is above-mentioned to the second receiver 10
Explanation, here is omitted.
The input of first receiver 7 by microwave gating switch 11 also with the limiter 6 of transmitting-receiving feeder-path
Output end is connected, and the input of limiter 6 is connected with transmit-receive switch 4, and transmit-receive switch 4 is connected with emitter 5, and transmit-receive switch 4 leads to
Transmitting-receiving feeder line 3 is crossed to be connected with transmitting-receiving feed 2.
A kind of method that high powered radar proximity detection is realized with two-way feeder line, the method for the proximity detection includes
Following steps：
A, the focal point setting transmitting-receiving feeder-path in radar antenna 1, and in the focal point setting at least of radar antenna 1
Road receives feeder-path, and the reception feeder-path includes receiving feed 8 and receives feeder line 9, receives feed 8 by receiving feeder line
9 are connected with receiver system；
The receiver system include the first receiver 7 and the second receiver 10, receive feed 8 by receive feeder line 9 with
The input connection of the second receiver 10, the input connection limiter 6 of the first receiver 7, limiter 6 connects with transmit-receive switch 4
Connect, transmit-receive switch 4 is connected with emitter 5, and transmit-receive switch 4 is connected by receiving and dispatching feeder line 3 with transmitting-receiving feed 2.
In another embodiment, receiver system only includes the first receiver 7, and the reception feed 8 is presented by receiving
Line 9 and microwave gating switch 11 are connected with the input of the first receiver 7 in transmitting-receiving feeder-path.First receiver 7
The output end of limiter 6 of the input by microwave gating switch 11 also with transmitting-receiving feeder-path be connected, the input of limiter 6
End is connected with transmit-receive switch 4, and transmit-receive switch 4 is connected with emitter 5, and transmit-receive switch 4 is connected by receiving and dispatching feeder line 3 with transmitting-receiving feed 2
Connect.
B, the emitter 5 of transmitting-receiving feeder-path are by receiving and dispatching feed 2 to the microwave radiation energy of radar antenna 1, radar antenna 1
Powerful microwave energy is radiate to spatial orientation；
Specific emission process is that the highpowerpulse signal that emitter 5 is launched is exported through transmit-receive switch 4, transmitting-receiving feeder line 3
To the microwave radiation energy of radar antenna 1 after to transmitting-receiving feed 2, radar antenna 1 is again by powerful microwave energy to spatial orientation
It radiate.
C, when by after the fire pulse width that emitter 5 launches highpowerpulse signal and reach transmitting-receiving feeder line lead to
Before the recovery time of the limiter 6 in road, the microwave signal that radar antenna 1 is reflected is received by receiving feed 8, and by connecing
Receive feeder line 9 and will receive the echo-signal that receives of feed 8 and transmitted to the signal processing terminal system by receiver system, it is right to realize
The detection of close-in target；
From the foregoing, when emitter 5 launches powerful pulse signal, when limiter 6 needs to recover by one
Between can just be operated, recovery time be △ T.Before the recovery time for reaching limiter 6, in order to realize to close-in target
Detection, it is necessary to pass through to receive the reception feed 8 of feeder-path and receive feeder line 9 echo-signal is transferred into receiver system, and
Transmitted to the signal processing terminal system by receiver system, the echo that feed 8 is received is received by the signal processing terminal system docking
After signal transacting, the detection to close-in target is realized.
D, when by after the recovery time of limiter 6, it is micro- by receive and dispatch that feeder-path receives that radar antenna 1 reflects
Ripple signal, is transmitted to the signal processing terminal system the echo-signal of reception by receiver system by limiter 6, to realize
Detection to required distance objective.
In the step d, the microwave signal that radar antenna 1 is reflected is being received by receiving and dispatching feeder-path, by limit
Width device 6 transmits while to the signal processing terminal system the echo-signal of reception by receiver system, the signal processing terminal
System is also received by receiving feed 8, receiving the echo-signal that feeder line 9 is transmitted.The echo received by receiving and dispatching feeder-path is believed
Number by the signal processing terminal system treatment after, the detection of distant object can be realized.In the specific implementation, signal transacting end
End system, when long-range detection is carried out, can be to be processed by receiving and dispatching the echo-signal of feeder-path, it is also possible to
Obtained by the echo signal processing for receiving feeder-path, the signal processing terminal system is this skill to the processing procedure of echo-signal
Known to the personnel of art field, here is omitted.
The transmitting-receiving feed 2 and reception feed 8 rotate at a high speed around same axle, and it is the transmitting-receiving of passage to obtain to receive and dispatch feed 2
The conical scanning of wave beam, and be the conical scanning of the reception wave beam of passage to receive feed 8.
As shown in figure 3, center of the O points for radar antenna 1, OF is the sensing of the central shaft of radar antenna 1（That is normal side
To）, to receive and dispatch feed 2 for the sensing of the transmitting-receiving wave beam of passage is OA, and angle between the normal of radar antenna 1 is set to α；With
Feed 7 is received for the reception beam position of passage is OC, and angle between the normal of radar antenna 1 is set to β.When transmitting-receiving feed
When the 1st, receiving normal of the feed 8 around radar antenna 1 with angular velocity omega high speed rotation, then there are two wave beams respectively with angle α
With β the high speed conical scanning that angular speed is ω is done around antenna normal.
The characteristic of radar antenna wave beam（The performance indications such as beam angle, directionality, gain）With antenna form, transmitting-receiving feed
2nd, feed 8 is received relevant with the locus of the focal length of radar antenna 1.Due to receiving feed 8 than transmitting-receiving feed 2 away from radar antenna
1 center line, this can cause angle β slightly larger than angle α, and these characteristics are more beneficial for the detection to closely moving target.
Assuming that α=0.1 °, when projector distance is L（It is assumed to be 2000m）, there is a moving object M at place（Such as insect M）From
The front of radar antenna 1 is flown in direction shown in Fig. 3, if the combination of the rotational speed omega and radar transmitter frequency of radar antenna 1 is lucky
Can allow wave beam OA（Angle is α）Twice sweep just is carried out to mobile object M in every turn, shifting so can be well calculated
The movement velocity and the direction of motion of animal body M.If in projector distance R（It is assumed to be 150m）Place has a kinetic characteristic just the same
Moving object N（Such as insect N）The front of radar antenna 1 is flown in direction as shown in Figure 3, if continuation is visited with wave beam OA
Survey, it is clear that in addition to the factor of detection blind area, it can be found that wave beam is not irradiated effectively to target from spatial relationship,
Detection performance cannot ensure.Only use wave beam OC（I.e.：With compared with mitre β）Conical scanning is carried out to be possible to effectively be visited
Survey.
The value of angle β has with the speed V apart from R, antenna rotation rate ω, the frequency of transmitting and moving target that emphasis is detected
Close.Therefore, it can rationally set the locus for receiving feed 8 as needed, adjust angle β that it receives wave beam to preferable
Position is effectively detected to target.For needing to detect the target of multistage emphasis distance, can set up multiple similar
Realized in the receiving channel for receiving the receiver 10 of feed 8 and second.
In Fig. 3, it is assumed that the rotational speed omega of antenna（Revolutions per second）Combination with tranmitting frequency can allow wave beam OC in every turn just
Just carry out twice sweep to moving object N, the time T=0.5/ ω of twice sweep, then the angle β of wave beam OC, then have
β= arctg(V/ω/2/R)
If wave beam OA（Angle is α）Also twice sweep just can be carried out to moving object M in every turn just, then β and α
Relation is：
β=arctg(L·tgα/R)
If L=2000m, α=0.1 °, R=150m, then：
β=arctg(2000·tg0.1/150)=1.33°。
In radar detection field, often think：1）, be remote spy to target to the research emphasis of radar range
Survey.2）, feed deviate aerial focus can reduce detection performance of the radar to target；3）, mitre conical scanning wave beam, no matter
Had little significance for the radar of Precision tracking radar or other purposes.
In the embodiment of the present invention, set simultaneously by the focal point in radar antenna 1 and receive feeder-path with transmitting-receiving feeder line
Passage, reflection echo signal is received by receiving feeder-path before the recovery time for reaching limiter 6, realizes mesh closely
Mark detection, not only changes conventional mistake in understanding, can also widen the frontier of radar antenna feeder research, extend new grinding
Study carefully problem, new radar kind can be developed accordingly.
The present invention at least receives feeder-path, it is to avoid use all the way on the premise of sharing with common antenna by setting
The limiter 6 for shielding, realizes the detection to point blank target；The reception feed 8 of feeder-path is received by setting
Locus, Reasonable adjustment receive wave beam deviate antenna normal direction angle, and with transmitting-receiving feeder-path do circular cone jointly
The technological means of scanning, realizes the effective detection to closely moving target characteristic, can solve high powered radar detection blind area
Excessive technical barrier, improves to the detectivity of point blank target, while detection performance is improved can also reduces cost,
Reach unexpected Effect on Detecting.
Claims (4)
1. a kind of system that high powered radar proximity detection is realized with two-way feeder line, including radar antenna（1）And positioned at described
Radar antenna（1）The transmitting-receiving feeder-path of focal point；The transmitting-receiving feeder-path includes being located at radar antenna（1）The receipts of focal point
Hair feed（2）；It is characterized in that：In the neighbouring radar antenna（1）Focal point set at least receive feeder-path all the way, it is described
Receiving feeder-path includes neighbouring radar antenna（1）The reception feed of focal point（8）, the reception feed（8）Presented by receiving
Line（9）With the second receiver（10）Connection；
Emitter（5）By receiving and dispatching feed（2）When carrying out signal transmitting, the second receiver（10）By receiving feed（8）And connect
Receive feeder line（9）The power for receiving signal is not more than the second receiver（10）The power that can bear；
The transmitting-receiving feeder-path also includes transmit-receive switch（4）, emitter（5）, limiter（6）And first receiver（7）, transmitting-receiving
Switch（4）By receiving and dispatching feeder line（3）With transmitting-receiving feed（2）Connection, transmit-receive switch（4）With emitter（5）Connection, and transmit-receive switch
（4）By limiter（6）With the first receiver（7）Input connection.
2. the system that high powered radar proximity detection is realized with two-way feeder line according to claim 1, it is characterized in that：Institute
State radar antenna（1）Including feed-forward type radar antenna, Feed-backward type radar antenna or offset-feed type radar antenna.
3. a kind of system that high powered radar proximity detection is realized with two-way feeder line, including radar antenna（1）And positioned at described
Radar antenna（1）The transmitting-receiving feeder-path of focal point；The transmitting-receiving feeder-path includes being located at radar antenna（1）The receipts of focal point
Hair feed（2）；It is characterized in that：In the neighbouring radar antenna（1）Focal point set at least receive feeder-path all the way, it is described
Receiving feeder-path includes neighbouring radar antenna（1）The reception feed of focal point（8）, the reception feed（8）Presented by receiving
Line（9）And microwave gating switch（11）With the first receiver in transmitting-receiving feeder-path（7）Input connection；
First receiver（7）Input pass through microwave gating switch（11）Also with the limiter of transmitting-receiving feeder-path（6）
Output end connection, limiter（6）Input and transmit-receive switch（4）Connection, transmit-receive switch（4）With emitter（5）Connection, receives
Hair switch（4）By receiving and dispatching feeder line（3）With transmitting-receiving feed（2）Connection；
The emitter（5）By receiving and dispatching feed（2）When carrying out signal transmitting, the second receiver（10）By receiving feed（8）
And receive feeder line（9）The power for receiving signal is not more than the second receiver（10）The power that can bear.
4. a kind of method that high powered radar proximity detection is realized with two-way feeder line, it is characterized in that, the proximity detection
Method comprises the following steps：
（a）, in radar antenna（1）Focal point transmitting-receiving feeder-path is set, and in radar antenna（1）Focal point set at least
Feeder-path is received all the way, and the reception feeder-path includes receiving feed（8）And receive feeder line（9）, receive feed（8）Pass through
Receive feeder line（9）It is connected with receiver system；
（b）, transmitting-receiving feeder-path emitter（5）By receiving and dispatching feed（2）To radar antenna（1）Microwave radiation energy, radar
Antenna（1）Powerful microwave energy is radiate to spatial orientation；
（c）, when by emitter（5）Launch after the fire pulse width of highpowerpulse signal and lead to transmitting-receiving feeder line is reached
The limiter in road（6）Recovery time before, by receiving feed（8）Receive radar antenna（1）The microwave signal for reflecting, and
By receiving feeder line（9）Feed will be received（8）The echo-signal of reception is transmitted to the signal processing terminal system by receiver system
System, to realize the detection to close-in target；
（d）, when by limiter（6）Recovery time after, by receive and dispatch feeder-path receive radar antenna（1）Reflect
Microwave signal, by limiter（6）The echo-signal of reception is transmitted to the signal processing terminal system by receiver system, with
Realize the detection to required distance objective；
The receiver system includes the first receiver（7）And second receiver（10）, receive feed（8）By receiving feeder line
（9）With the second receiver（10）Input connection, the first receiver（7）Input connection limiter（6）, limiter（6）
With transmit-receive switch（4）Connection, transmit-receive switch（4）With emitter（5）Connection, and transmit-receive switch（4）By receiving and dispatching feeder line（3）With receipts
Hair feed（2）Connection；
The transmitting-receiving feed（2）And receive feed（8）Rotated at a high speed around same axle, obtain receiving and dispatching feed（2）It is the receipts of passage
The conical scanning of wave beam is sent out, and to receive feed（8）It is the conical scanning of the reception wave beam of passage；
The step（d）In, receiving radar antenna by receiving and dispatching feeder-path（1）The microwave signal for reflecting, by limit
Width device（6）The echo-signal of reception is transmitted while to the signal processing terminal system by receiver system, signal transacting end
End system is also received by receiving feed（8）, receive feeder line（9）The echo-signal of transmission.
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| CN104569942A (en) * | 2014-12-18 | 2015-04-29 | 北京无线电计量测试研究所 | Monostation radar target characteristic measurement method for identifying positions of synchronous scattering points |
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