高次模对微带天线方向图的影响分析

Analysis of the Influence of the High Order Modes on the Pattern of Microstrip Antenna

微带天线具有剖面低、重量轻、易于与平台共形等优点,传统微带天线带宽较窄,目前已有一些方法来展宽微带天线的带宽,然而,设计中发现,展宽微带天线带宽的同时可能会导致高次模的出现,高次模的出现导致天线方向图的恶化,目前这方面研究还较少。本文基于微带天线模型,分析了高次模对微带天线方向图的影响。

Microstrip antenna has the advantages of low profile, light weight and easy to be conformal with the shape of the platform. The bandwidth of traditional microstrip antenna is narrow, and some methods to broaden the bandwidth of microstrip antenna have been proposed in recent years. However, high order modes may be occurred while broadening the bandwidth of the microstrip antenna, which will led to the deterioration of the antenna pattern. Basing on the model of microstrip antenna, the factors that impact on the bandwidth of the microstrip antenna have been studied in this paper.