Adaptive beam width multi-beam forming method for obliquely placed array plane

Abstract

The invention provides a self-adaptive beam width multi-beam forming method for an inclined array plane, which comprises the following steps of: performing traversal search on an airspace coverage range by adopting an azimuth multi-beam pitching scanning mode, and performing matching compensation on a pitching directional angle according to a vertical wave width of a pitching direction where transverse multi-beams are positioned; and keeping the horizontal wave width of each wave beam in the horizontal direction of the same pitching layer to be the same as the horizontal wave width of the wave beam in the azimuth method of the layer through a Taylor window coefficient broadening method. According to the method, space resources for receiving multiple beams at different pitch angles of the phased array plane are fully utilized, beam broadening is performed only in the horizontal dimension, directional diagram distortion of side beams is reduced as much as possible on the premise that the airspace coverage requirement of a geodetic coordinate system is met, and the direction finding precision of the array plane is improved.

Description

technical field [0001] The invention relates to an active phased front system, in particular to an adaptive beam width multi-beam forming method of an obliquely placed front. Background technique [0002] According to the actual application scenarios of the antenna array, and in order to reduce the influence of the multipath effect, the phased array system often adopts the fastening method of inclined installation. Under the phased front system that receives signals in the azimuth multi-beam elevation scanning method, the airspace coverage remains unchanged, and the change of the installation inclination will require readjustment and optimization of the multi-beam arrangement of the front. The traditional adjustment method is often only realized by changing the original two-dimensional width of each beam. For side beams at extreme positions such as high pitch and high azimuth, excessive widening will cause distortion of the beam pattern, which will seriously affect the direc...

AI Technical Summary

Problems solved by technology

The traditional adjustment method is often only realized by changing the original two-dimensional width of each beam. For side beams at extreme positions such as high elevation and high azimuth, excessive broadening will cause distortion of the beam pattern, which will seriously affect the direction finding accuracy.

At the same time, due to the coordinate system transformation caused by the inclination angle, the beam that was originally close to the azimuth boundary may have exceeded the effective range of the scanning airspace under high pitch pointing, resulting in a waste of system beam resources

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