天线选择性幅值扰动形成阵列零陷的技术

首先提出了一种在阵元关于阵列中心对称的线阵中利用幅值扰动形成零陷的新方法,该方法克服了传统幅值扰动方法零陷深度不足、旁瓣水平高的缺陷,且能够在多个强干扰源方向或在较宽的范围形成深度零陷而不影响主瓣。为了减少每次需要控制的阵元数,提高系统鲁棒性,在此基础上进一步提出了利用天线选择性幅值扰动形成零陷的方法。仿真结果表明,其性能可与基于全部天线进行幅值扰动的算法相比,甚至可与复权值控制方法的性能相比。

Array pattern nulling by amplitude-only perturbations of selected elements

A new method based on amplitude-only perturbations of elements for the pattern synthesis of linear antenna array with prescribed nulls is proposed.It is capable of steering narrow and broad nulls with satisfactory nulls depth and acceptable sidelobe level in the beam pattern in the directions of strong interference signals without affecting the main beam.Based on this new method,a selective algorithm is introduced for the purpose of reducing the number of controlled elements for null steering,and increasing the robust of the system.Simulation results have shown that the results are comparable to those obtained from the method of controlling the amplitudes of all elements,and even comparable to that obtained by controlling complex weights.