基于自适应算法的带罩阵列天线方向图综合  

A Pattern Synthesis Method for Radome-enclosed Adaptive Array Antenna

作　　者：蒋里芳[1] 万国宾[1] 郑莲玉[1] 

机构地区：[1]西北工业大学电子信息学院,西安710129

出　　处：《遥测遥控》2013年第3期63-67,共5页Journal of Telemetry,Tracking and Command

基　　金：航空科学基金(20101853019)

摘　　要：提出一种基于自适应天线理论的带罩阵列天线方向图综合方法。先用射线追踪法计算到达罩内阵列天线的入射信号,通过自适应算法进行波束赋形,再用表面积分法得到带罩自适应天线的远区辐射场。用权函数的迭代来减小带罩方向图和无罩方向图的差别,实现天线与罩的一体优化。数值仿真结果表明,该方法能实现对带罩阵列天线主瓣指向、零陷位置和副瓣电平的控制,同时减小了天线罩对系统辐射特性方面的影响。This paper presents a pattern synthesis method for the radome-enclosed antenna based on the adaptive array theory.The incident signal of the antenna-radome system is calculated with the ray tracing technique first.Then the synthesis pattern is formed by an adaptive algorithm.The surface-integration method is employed to the far-field radiation formulation for the radome-enclosed adaptive array antenna.The values of the weighting function are iterated to minimize the absolute difference between the synthesized and desired patterns,which can optimize the antenna-radome system.Numerical examples show that the algorithm can steer the main beam and null in given directions and yield the sidelobe meeting a specified level.The method can minimize the effect of the radome on the system radiation characteristics.

关 键 词：方向图综合 天线罩 自适应算法 一体化设计 

分 类 号：TN821.9[电子电信—信息与通信工程]