全空域多目标测控天线零点约束方向图综合方法

A Synthesis Method of Beam Pattern with Nulls for TT&C Antenna for Multi-target in Hemispherical Coverage

针对全空域多目标测控天线相互干扰的问题,提出了一种基于零点约束的全空域多目标测控天线方向图综合方法。该方法对多个干扰目标方向进行零点约束,求取逼近给定方向图的最优权矢量的闭合解,生成具有干扰抑制能力的优化波束方向图。仿真结果表明,所提方向图综合方法在维持原有给定方向图特性的前提下,可在多个方向形成有效零点。在等效2 m口径全空域多目标测控实物天线对该方法开展试验验证,结果表明在干扰方向抑制能力大于60 d B,证明了方法的正确性。

To solve the beam to beam interfereace problem,a synthesis method of beam pattern of multi-target TTC antenna based on the null points constraints is presented. The method gains the closed solution of the optimal weight vector with the zero constraint on the direction of interference,and generates the beam pattern with the interference rejection capability. The simulation results show the proposed method of beam pattern may form effective null points in multiple directions under the condition of maintaining the original beam pattern feature. The method is tested on the equivalent two-meter caliber TTC antenna for multi-target in hemispherical coverage and the result shows that the rejection ability in interference direction is greater than 60 d B,which proves the correctness of the solution.