An Angle Measurement Method for Missile Radar Based on Phased Array Antenna
A phased array antenna and angle measurement technology, applied in radio wave measurement systems, radio wave reflection/re-radiation, measurement devices, etc. , to achieve the effect of simple hardware structure, reduced implementation difficulty and fast speed
Inactive Publication Date: 2017-03-15
NANJING UNIV OF SCI & TECH
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Problems solved by technology
[0003] The disadvantages of the existing technology are: 1) The mechanical scanning conical scanning angle measurement has the disadvantages of slow speed and large inertia; 2) The electrical scanning conical scanning angle measurement has a high requirement for the phase shift interval of the phased array antenna, and the current millimeter wave band 3) The receiver structure of the ratio amplitude / phase ratio and difference dual-beam angle measurement method is complex, especially in the dual-plane and difference dual-beam angle measurement, there are too many branches for signal processing
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[0016] In conjunction with accompanying drawing, a kind of missile-borne radar angle measuring method based on phased array antenna of the present invention, the steps are as follows:
[0017] Step 1. When the projectile enters the terminal guidance state after launching, determine the target plane perpendicular to the center line of the projectile according to the current attitude of the projectile, project the azimuth axis and pitch axis of the projectile itself to the target plane to establish a two-dimensional coordinate system, and the azimuth axis The projection with the pitch axis is the X-axis and the Y-axis, the intersection point of the projectile centerline and the target plane is the origin of the coordinate system, and the phased array antenna beam direction is controlled to deviate from the projectile centerline at an angle δ pointing to the two-dimensional coordinate system of the target plane and set the beam direction as beam direction A, use the receiver to do...
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The invention discloses a phased array antenna-based missile-borne radar angle measuring method, which is an amplitude comparing simulation method and a differential double beam angle measuring method using a phased array antenna. According to the method, scanning of beams in four different directions is finished by controlling the phased array antenna; firstly the amplitude of each beam direction is acquired respectively, then a sum signal and different signals in directions of X axis and Y axis can be obtained through a calculation method capable of eliminating error caused by distance change, next the deflection angle values in the directions of X axis and Y axis are calculated by the amplitudes of the sum signal and the different signals, and finally the obtained deflection angle is corrected. The invention provides the angle measuring method which has the advantages of simple structure, better angle measuring precision and low cost, and is suitable for the fields such as missile-borne radar.
Description
technical field [0001] The invention relates to the field of radar signal processing, and mainly relates to a missile-borne radar angle measurement method based on a phased array antenna. Background technique [0002] A very representative modern weapon in today's war is a precision-guided weapon. The precision guided weapon completes the tracking of the target in the final guidance stage, and the tracking of the target is based on the measurement of the target angle. There are many methods of radio angle measurement, which are divided into traditional angle measurement methods and modern angle measurement methods. Traditional angle measurement methods include amplitude angle measurement, phase angle measurement, single-beam scanning angle measurement and double-beam angle measurement, while modern angle measurement methods are angle estimation methods based on array antennas. Ballistic radar angle measurement applications usually use traditional angle measurement methods,...
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IPC IPC(8): G01S3/20G01S13/60G01S13/68F41G5/26
CPCF41G5/26G01S3/20G01S13/58G01S13/68G01S2013/0245
Inventor 吴礼彭树生周明宇肖泽龙许建中王磊
Owner NANJING UNIV OF SCI & TECH