摘要
常规频率分集雷达(FDA)在发射阵元采用均匀的频率间隔,从而可以形成距离-角度耦合的波束方向图。但是该方向图在多个距离上均形成多峰值波束,当干扰位于任一波束最大指向的距离时,将会带来信干噪比损失。针对上述问题,该文通过分析波束形成的表达式,从原理上提出一个关于频率分集雷达阵列配置的基本原则,能够在指定的距离角度范围内,形成单峰值的波束方向图。几种特例和仿真结果均证明了该原则的有效性。
It has been shown that Frequency Diverse Arrays(FDA)exhibit a range-angle dependent beam steering feature by employing a uniform frequency increment across the array elements.However,this beam pattern generates maxima at multiple range values,possibly leading to loss of signal-to-interference-plus-noise ratio when the interferences are located at any of the maxima.Herein,we prove that the beam pattern of FDA is range-periodic and propose the basic criteria for the FDA configuration to decouple the range and angle.In an illuminated space,a single-maximum beam pattern can be obtained by configuring the frequency increment between the elements.Specific examples have been discussed herein,and the simulation results verify the proposed theory.
作者
项喆
陈伯孝
Xiang Zhe;Chen Baixiao(National Laboratory of Radar Signal Processing, Xidian University, Xi'an 710071, China)
出处
《雷达学报(中英文)》
CSCD
北大核心
2018年第2期212-219,共8页
Journal of Radars
基金
The National Natural Science Foundation of China(61571344)
Shanghai Academy of Spaceflight Technology(SAST2015064,SAST2015071)
关键词
频率分集雷达
距离-角度耦合
单峰值波束
阵列配置
Frequency Diverse Arrays (FDA)
Range-angle-dependent
Single-maximum beampattern
Configuration