CN105866768B - One kind improves Amplitude Ratio width angle-measuring equipment and method - Google Patents
One kind improves Amplitude Ratio width angle-measuring equipment and method Download PDFInfo
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- CN105866768B CN105866768B CN201610229378.8A CN201610229378A CN105866768B CN 105866768 B CN105866768 B CN 105866768B CN 201610229378 A CN201610229378 A CN 201610229378A CN 105866768 B CN105866768 B CN 105866768B
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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
- G01S13/06—Systems determining position data of a target
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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
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
- G01S7/411—Identification of targets based on measurements of radar reflectivity
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
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- Computer Networks & Wireless Communication (AREA)
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- Radar Systems Or Details Thereof (AREA)
Abstract
The present invention relates to one kind to improve Amplitude Ratio width angle-measuring equipment and method, belongs to radar wave detection equipment and method and technology field.Its main feature is that：Modified Amplitude Ratio width angle-measuring equipment is made of one-to-two power splitter, five in one synthesizer etc.；One-to-two power splitter is connected by attenuator with element antenna, and the signal end of one-to-two power splitter is connected with moving to left and moving to right echo five in one synthesizer respectively；Move to left echo five in one synthesizer and move to right echo five in one synthesizer and form 4 groups in pairs, echo five in one synthesizer output terminal is moved to left and moved to right respectively by being connected after 3 two-in-one synthesizer synthesis with two receivers, form two or so offsets and wave beam substitutes original difference beam, improve dead-center position range value, reducing interference signal influences zero crossings position, effectively improves Azimuth measurement precision.Solve it is existing formed by combiner and wave beam and difference beam, because difference beam zero point range value is by severe jamming, the problem of making zero crossings azimuth determination lack accuracy.
Description
Technical field
The present invention relates to one kind to improve Amplitude Ratio width angle-measuring equipment and method, belongs to radar wave detection equipment and method and technology neck
Domain.
Background technology
Radar is traditional and poor measuring angle by comparing amplitude method, is to be formed by combiner and wave beam and difference beam, and wave beam is used for
Detection target range simultaneously tracks target, and difference beam is then used for azimuth and the pitch angle for detecting target.Target is maximum with wave beam
When being worth direction, difference beam amplitude is zero, and when the object moves, difference beam amplitude becomes strong, so that it may according to difference beam signal amplitude value
To judge the size of target deviation angle, so as to measure the azimuth where detection target.But due to difference beam zero point range value
It is too small, almost fallen into oblivion by interference signals such as noise, clutters, the difference beam amplitude of zero crossings position is disturbed seriously, is caused
The azimuth determination precision of zero crossings is not high, seriously affects the accuracy of radar detection target.
The content of the invention
It is an object of the invention to：In view of the above shortcomings of the prior art, there is provided a kind of easy to make, operating method letter
It is single, difference beam zero crossings azimuth determination precision is effectively improved, ensures the improvement amplitude measuring angle by comparing amplitude of radar detection accuracy
Device and method；Solve it is existing formed by combiner and wave beam and difference beam, because difference beam zero point range value is by severe jamming,
The problem of causing zero crossings azimuth determination lack accuracy, seriously affecting radar detection accuracy.
The present invention is to realize above-mentioned purpose by the following technical solutions：
One kind improves Amplitude Ratio width angle-measuring equipment and method, it is characterised in that：The day of modified Amplitude Ratio width angle-measuring equipment
Often row is made of linear array 20 element antennas, 4 work(allocation/synthesizers, 1 signal synthesizer, two receivers；Each work(point
No. 5 attenuators, 5 one-to-two power splitters and 2 five in one synthesizers are integrated with synthesizer；6 are integrated with signal synthesizer
A two-in-one synthesizer；
Element antenna after attenuator amplitude weighting with one-to-two power splitter by being connected, 1 end of signal of one-to-two power splitter
It is connected with moving to left echo output five in one synthesizer, 2 end of signal of one-to-two power splitter is synthesized with moving to right echo output five in one
Device connects；Move to left echo output five in one synthesizer and move to right echo output five in one synthesizer and form 4 groups in pairs；Move to left
Echo output five in one synthesizer output terminals A after 3 two-in-one synthesizer synthesis again by being connected to receiver 1；Similarly, move to right
Echo exports five in one synthesizer output terminal B by being connected to receiver 2 after other 3 two-in-one synthesizer synthesis.
The improvement Amplitude Ratio width angle-measuring equipment is to realize azimuth high-acruracy survey by the following method：
Element antenna received signal will by entering one-to-two power splitter, one-to-two power splitter after attenuator amplitude weighting
While signal is divided into two-way, the length of arm is also divided the phase on every road to be fixed deviation phase shift, one-to-two work(point by work(
The phase for the signal 1 that device separates from left to right fixed phase value △ φ incremented by successively,
Fixed phase value △ φ are by formulaIt is calculated,
In formula：D is element antenna spacing, and λ is radar operation wavelength, and ψ is and the wave beam phase shift number of degrees；
The phase for the signal 2 that one-to-two power splitter separates from left to right is successively decreased same phase value successively；Then respectively will again
Signal 1 and signal 2, which are sent to, to move to left echo output five in one synthesizer and moves to right in echo output five in one synthesizer, is formed respectively
4 roads move to left echo A and 4 tunnels move to right echo B, and 4 roads move to left echo A and carry out phase shift and attenuation amplitude by 3 two-in-one synthesizers
Formation and wave beam 1 after weighting, and wave beam 1 is relative to 1 ° of not phase shift and wave beam phase shift to the left；4 tunnels move to right echo B by 3 two
Unify synthesizer carry out phase shift and attenuation amplitude weighting after formed and wave beam 2, and wave beam 2 relative to not phase shift and wave beam to the right
1 ° of phase shift, forms the lobe pattern for being similar to poor lobe on lobe pattern；
Receiver 1 is sent to wave beam 1, and wave beam 2 is sent to receiver 2；Echo signal respectively with wave beam 1 with and wave beam 2
As soon as upper each own range value, the azimuth information of target is can determine that by the ratio of the two range values.
Described and wave beam 1 with and wave beam 2 at the same time produce within the same pulse period of radar, and wave beam 1 and and ripple
Beam 2 belongs to amplitude-comparison monopulse.
Described and wave beam 1 relative to not phase shift and 1 ° of wave beam phase shift to the left, and wave beam 2 relative to not phase shift and ripple
1 ° of beam phase shift to the right, the smaller docking collection of letters amplitude fading of phase shift is smaller, and during 1 ° of a phase shift, amplitude fading is less than 0.01dB, right
The influence of angle measurement can be neglected.
Described and wave beam 1 with and wave beam 2 substitute original difference beam, improve dead-center position range value, reduction interference signal
Influence to zero crossings position, ensure that Azimuth measurement precision.
The beneficial effect of the present invention compared with prior art is：
One kind improves Amplitude Ratio width angle-measuring equipment and method, and easy to make, operating method is simple, passes through consolidating for power division network
Determine phase shift and form two or so the deviate and original effects being formed by combiner and difference beam of wave beam substitution, be greatly improved
Difference beam dead-center position range value, reduces influence of the noise interferences to zero crossings position, effectively increases orientation
The precision of angle measurement.The strong guarantee accuracy of radar detection.Improve and solve existing formed by combiner and wave beam and poor
Wave beam, because difference beam zero point range value is by severe jamming, causes zero crossings azimuth determination lack accuracy, seriously affects radar
The problem of detection accuracy.
Brief description of the drawings
Fig. 1 is the reception signal of the present invention from antenna to the signal flow graph of five in one synthesizer；
Fig. 2 receives signal from the signal flow graph from five in one synthesizer to receiver for the present invention's；
Fig. 3 be and wave beam 1 and and wave beam 2 or so shift to after the lobe pattern similar to difference beam that is formed；
Fig. 4 is the original and lobe pattern of difference beam.
Embodiment
Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings：
One kind improves Amplitude Ratio width angle-measuring equipment and method, it is characterised in that：The day of modified Amplitude Ratio width angle-measuring equipment
Linear array is often gone by 20 element antennas, 4 work(allocation/synthesizers（Be integrated with each work(allocation/synthesizer No. 5 attenuators, 5 one
Divide two power splitters, 2 five in one synthesizers）, 1 signal synthesizer（6 two-in-one synthesizers are integrated with it）, two receive
Machine forms；By being connected after attenuator amplitude weighting with one-to-two power splitter, the pad value of attenuator is element antenna by weighting
Number determines, is designed in the method for the present invention by reception minor level less than -35dB；The output of one-to-two power splitter is to wait work(point not
Equiphase；Output 1 end of signal is connected with moving to left echo output five in one synthesizer, and output 2 end of signal is with moving to right echo output five
Unify synthesizer connection；Move to left echo output five in one synthesizer and formed in pairs with moving to right echo output five in one synthesizer
4 groups, move to left echo output five in one synthesizer output terminals A again by 3 two-in-one synthesizers synthesis after, formation is moved to left and wave beam
1 is connected to receiver 1, after similarly moving to right echo output five in one synthesizer output terminal B by another 3 two-in-one synthesizers, shape
Into moving to right receiver 2 is connected to wave beam 2.
The improvement Amplitude Ratio width angle-measuring equipment is to realize azimuth high-acruracy survey by the following method：
Antenna received signal is by entering one-to-two power splitter after attenuator amplitude weighting, one-to-two power splitter is by signal
While being divided into two-way, the length of arm is also divided the phase on every road to be fixed deviation phase shift, one-to-two power splitter point by work(
The phase of the signal 1 gone out from left to right fixed phase value △ φ incremented by successively（The value is by formulaMeter
Draw, d is element antenna spacing in formula, and λ is radar operation wavelength, and ψ is and the wave beam phase shift number of degrees.）, the phase of signal 2 from
Left-to-right same phase value of successively decreasing successively；Then signal 1 and signal 2 are sent to respectively again and move to left echo output five in one synthesizer
With move to right in echo output five in one synthesizer, form that 4 roads move to left echo A and 4 tunnels move to right echo B respectively, 4 roads move to left echo A
By formation and wave beam 1 after 3 two-in-one synthesizers progress phase shifts and attenuation amplitude weighting, and wave beam 1 is relative to not phase shift
With 1 ° of wave beam phase shift to the left, 4 tunnels move to right after echo B carries out phase shift and attenuation amplitude weighting by 3 two-in-one synthesizers and are formed
The ripple for being similar to poor lobe is formed on lobe pattern relative to 1 ° of not phase shift and wave beam phase shift to the right with wave beam 2, and wave beam 2
Valve figure；
Receiver 1 is sent to wave beam 1, and wave beam 2 is sent to receiver 2；Echo signal respectively with wave beam 1 with and wave beam 2
As soon as upper each own range value, the azimuth information of target is can determine that by the ratio of the two range values.
Described and wave beam 1 with and wave beam 2 be rather than the order generation with caused, two wave beams are same in radar
In one pulse period, belong to amplitude-comparison monopulse.
Described and wave beam 1 relative to not phase shift and 1 ° of wave beam phase shift to the left, and wave beam 2 relative to not phase shift and ripple
1 ° of beam phase shift to the right, the smaller docking collection of letters amplitude fading of phase shift is smaller, and during 1 ° of a phase shift, amplitude fading is less than 0.01dB, right
The influence of angle measurement can be neglected.
Described and wave beam 1 with and wave beam 2 substitute original difference beam, improve dead-center position range value, reduction interference signal
Influence to zero crossings position, ensure that Azimuth measurement precision.（Referring to Fig. 1~4）
The improvement Amplitude Ratio width angle-measuring equipment and method, the echo signal that 20 element antennas receive by attenuator into
One-to-two power splitter is sent to after row Chebyshev weighting and carries out phase shift processing, so that one-to-two power splitter left signal phase after phase shift
Position is from left to right incremented by 3.68 ° of fixed phase value, and right wing signal phase from left to right successively decreases 3.68 ° of fixed phase value, then will move
Signal after phase is sent to five in one synthesizer and forms that 4 roads move to left echo A and 4 tunnels move to right echo B respectively（Referring to Fig. 1）, last 4 tunnel
Move to left echo A formation and wave beam 1 after 3 two-in-one synthesizers carry out phase shift and attenuation processing and be sent to receiver 1；4 roads are right
It is moved back to ripple B formation and wave beam 2 after 3 two-in-one synthesizers carry out phase shift and attenuation processing and is sent to receiver 2（Referring to figure
2）, thus obtained two or so phase shifts and wave beam, i.e., each respectively to the left, move right 1 °（Referring to Fig. 3）Target is believed
As soon as respectively having a range value in the two and wave beam number respectively, the orientation of target be can determine that out by the ratio of the two range values
Information.
The above is presently preferred embodiments of the present invention, and the example above illustrates not make the substantive content of the present invention
Limitation in any form, technology of the person of an ordinary skill in the technical field after this specification has been read according to the present invention
Any simple modification or deformation that essence makees above embodiment, and the technology contents possibly also with the disclosure above
The equivalent embodiment of equivalent variations is changed or is modified to, in the range of still falling within technical solution of the present invention, without departing from
The spirit and scope of the invention.
Claims (2)
1. one kind improves Amplitude Ratio width angle-measuring equipment, its aerial array is often gone by 20 element antennas, 4 work(allocation/synthesizers, 1
A signal synthesizer, two receiver compositions；Be integrated with each work(allocation/synthesizer No. 5 attenuators, 5 one-to-two power splitters and
2 five in one synthesizers；6 two-in-one synthesizers are integrated with signal synthesizer；
It is characterized in that：Element antenna by being connected after attenuator amplitude weighting with one-to-two power splitter, one-to-two power splitter
1 end of signal is connected with moving to left echo output five in one synthesizer, and 2 end of signal of one-to-two power splitter is with moving to right echo output pentahapto
One synthesizer connects；Move to left echo output five in one synthesizer and move to right echo output five in one synthesizer and form 4 in pairs
Group, moves to left echo output five in one synthesizer output terminals A again by being connected to receiver 1 after 3 two-in-one synthesizer synthesis；It is right
Ripple output five in one synthesizer output terminal B is moved back to by being connected to receiver 2 after other 3 two-in-one synthesizer synthesis.
A kind of 2. method for improving Amplitude Ratio width angle-measuring equipment described in claim 1, it is characterised in that：It is by as follows
Method realizes azimuth high-acruracy survey：
Antenna received signal is divided the signal into by entering one-to-two power splitter, one-to-two power splitter after attenuator amplitude weighting
While two-way, the length of arm is also divided the phase on every road to be fixed deviation phase shift by work(, one-to-two power splitter separates
The phase of signal 1 from left to right fixed phase value △ φ incremented by successively
Fixed phase value is by formulaIt is calculated,
In formula：D is element antenna spacing, and λ is radar operation wavelength, and ψ is and the wave beam phase shift number of degrees；
The phase for the signal 2 that one-to-two power splitter separates from left to right is successively decreased same phase value successively, then again respectively by signal 1
It is sent to signal 2 and moves to left echo output five in one synthesizer and move to right in echo output five in one synthesizer, forms a 4 tunnels left side respectively
It is moved back to ripple A and 4 tunnels moves to right echo B, after 4 roads moves to left echo A by 3 two-in-one synthesizers progress phase shifts and attenuation amplitude weighting
Formation and wave beam 1, and wave beam 1 is relative to 1 ° of not phase shift and wave beam phase shift to the left；4 tunnels move to right echo B and pass through 3 two-in-one conjunctions
Grow up to be a useful person carry out phase shift and attenuation amplitude weighting after formed and wave beam 2, and wave beam 2 relative to not phase shift and wave beam phase shift to the right
1 °, the lobe pattern for being similar to poor lobe is formed on lobe pattern；
Receiver 1 is sent to wave beam 1, and wave beam 2 is sent to receiver 2；Echo signal respectively with wave beam 1 with and wave beam 2 on respectively
As soon as an own range value, the azimuth information of target is can determine that by the ratio of the two range values；
Described and wave beam 1 with and wave beam 2 at the same time generation within the same pulse period of radar；With wave beam 1 and and the category ratio of wave beam 2
Width pulse；
It is described to move to left with wave beam 1 relative to 1 ° of not phase shift and wave beam phase shift to the left, move to right the sum relative to not phase shift with wave beam 2
1 ° of wave beam phase shift to the right, the smaller docking collection of letters amplitude fading of phase shift is smaller, and during 1 ° of a phase shift, amplitude fading is less than 0.01dB,
Influence to angle measurement can be neglected；
Described and wave beam 1 with and wave beam 2 substitute original difference beam, improve dead-center position range value, reduction interference signal is to zero point
The influence of neighbouring position, ensure that Azimuth measurement precision.
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| CN106814348B (en) * | 2015-12-01 | 2019-11-01 | 启碁科技股份有限公司 | Radar antenna system |
| CN111537992A (en) * | 2020-03-30 | 2020-08-14 | 西安电子科技大学 | Sum-difference tracking angle measurement method for resisting main lobe interference and side lobe interference based on block parallel SMI algorithm |
| WO2022104666A1 (en) * | 2020-11-19 | 2022-05-27 | 深圳市大疆创新科技有限公司 | Radar system, movable platform, control method, obstacle avoidance method, and storage medium |
| CN113189579B (en) * | 2021-03-24 | 2022-08-16 | 四川九洲空管科技有限责任公司 | Hybrid monopulse angle measurement system and method |
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