基于固定与对数频偏的频率分集阵列雷达波束特性研究

常规频率分集阵列(FDA)雷达相较于传统相位控制阵列雷达具备独特的距离-角度均相关的波束特性,近年来多种不同形式的FDA雷达得到了广泛关注与深入研究,文中对基于固定频偏和对数频偏的FDA雷达波束特性进行了较为详细的分析,利用MATLAB 对两种形式的FDA雷达波束特性进行了仿真与比较。结果表明,通过改变阵元间的频偏形式、频偏量大小等,能有针对性地形成满足雷达不同探测需求的FDA雷达波束特性,能适应多变的探测环境和抑制干扰、提高目标探测能力。

A Study on Beampattern of Frequency Diverse Array Radar of Uniform and Logarithmically Increasing Frequency Offset

Compared with the traditional phased-array radar, frequency diverse array(FDA) radar possesses the distinctive range-angle-dependent beampattern. In recent years, much attention has been paid to FDA radar and deep research has been carried out.In this paper, detailed analysis of FDA radar beampattern of uniform and logarithmically increasing frequency offset has been carried out, MATLAB simulation has been fulfilled, and comparison has been made. It can be inferred from the result that by changing the form of frequency offset, different FDA radar beampattern can be formed, which can satisfy the different detecting demand of radar, adapt to the varying environment, reject interference, and improve the detecting ability of target.