用改进的Bulter矩阵实现固定多波束面天线阵

A Multibeam Planar Array Realized by Modified Butler Martix

本文给出一种用改进的 Bulter移相网络实现面天线阵的方法。这是一种固定多波束天线系统。天线由四个全向天线组成 ,天线阵的方向性可通过改变馈电端口来控制 ,提供 360度全方向覆盖 ,方向解析度为 90度 ,如再加入分配网络 ,方向解析度可达 45度。这种天线可用于基站或移动台作为电控天线 ,或用于 Do A(信号到达角 )的粗略估计。

A planar multibeam array realized by modified B ulter phase network is provided.The array is made up of four omnidirectionnal an t ennas.Its pattern can be controlled by changing feeding port,and it will complet ely cover the horizontal surface.The directional resolution is 90 degree,and can be improved to 45 degree when using distribution network.This kind of array can be used for base station or mobile station,and for the approximate estimation o f DoA(Direction of Arrival)also.