双极化多形微带天线的隔离研究

本文分析了双极化多形微带天线的隔离,给出简要的理论结果。其理论基础系微带天线的“腔模理论”和“感应原理”。假定天线贴片和接地板之间的场结构与由电壁和碰壁组成的腔体场近似,研究了多种几何形状、发射或接收,线极化或圆极化的两相同微带天线元的隔离。给出了一些降低天线元间耦合以及缩小天线尺寸的方法。

THE ISOLATION OF DUAL-POLARIZATION MULTIPLEX MICROSTRIP ANTENNAS

A simple theory is developed for the analysis of isolation of dual-polarization multiplex microstrip antennas. The analysis is based on the "cavity model" and the "reaction principle". The shape of the field distribution between the patch and the ground plane is assumed to be well approximated by that of the resonant modes of a corresponding magnetic and eiectric walled cavity. Two element microstrip antennas of various geometries for either transmitting or receiving the linearly and circularly polarized wave are studied.Some methods are found to reduce their physical dimensions and to evaluate the isolation between the elements for various configurations.