一种利用幅值抖动形成阵列零陷的方法

曾云宝; 黄才试; 彭涛; 王文博

一种利用幅值抖动形成阵列零陷的方法

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出版历程
- 收稿日期: 2005-04-11
- 修回日期: 2005-08-30
- 刊出日期: 2006-11-19

Array Pattern Nulling by Amplitude-Only Perturbations

摘要

摘要: 该文提出了一种在阵元关于阵列中心对称的线阵中利用幅值抖动形成零陷的方法，该方法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, 同时克服了传统幅值抖动方法零陷深度不足、旁瓣水平高的缺陷。该方法使得移相器只需用来控制主瓣方向, 加快了响应速度。仿真表明，该算法实现简单，且其性能可与复权值控制方法的性能相比。同时由于幅度抖动的对称性, 在中心对称的线阵中只需要天线数目一半的衰减器, 成本较低。
- 幅值抖动; 零陷; 衰减器
Abstract: A new method based on amplitude-only perturbations 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 in the directions of strong interference signals and acceptable sidelobe level in the beam pattern without affecting the main beam. The phase shifters are only used to steer the main beam toward the desired direction. In so doing, the responsed time can be reduced. Simulation results show that this method is easier to realize, and its capability is comparable to that of controlling complex weights (both amplitude and phase). Besides, the fact that the amplitude perturbations of the elements are symmetrical about the center of the array means that the amount of attenuators is halved.

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