微带天线的多频特性

引言 微带天线由于具有一系列独特的优点,正在受到人们越来越多的重视,可以预计,在不远的将来,微带天线将在很广泛的应用场合取代人们已应用了多年的一大类天线。 微带天线固有的一个重要特性——多频特性,即一个微带天线可以在离散的多个频率点上工作的特性,至今尚未被人们所充分认识、研究和利用。本文初步研究了微带天线的多频特性（对VSWR而言）,包括多频的观测、实验和理论分析。

MULTI-FREQUENCY CHARACTERISTIC OF MICROSTRIP ANTENNA

A Microstrip antenna which has many operating frequency is defined as multi-frequency characterstic of microstrip antenna.Experiments show that multi-frequency is a proper property of microstrip antenna and some experimental results are presented in the table I and table II.This multi-frequency characteristic can be observed and measured by sweep-frequency method. One example is presented in figure 3 .Direct observation multi-frequency characteristic is presented first in our paper.In this example, the microstrip antanna has ten operating frequencies, from 2000 to 7000MHzThe multi-frequency characteristic can be explained by the resonator theory of microstrip and calculated by the compound calculation method which is presented in this paper.Compound calculation method is a new method.Experiments show that the error is less than 3% when compound calculation method is used.