漏波現象之一般特性及輻射場形之研究

Abstract

在本文中,我們對漏波現象提供一個清晰的描述並探討其輻射場形.第一章 之重點在闡述微條傳輸線高階模的漏波現象;我們指出其一般特性並賦予 物理解釋.雖然以微條傳輸線為討論主題,對於漏波現象相關的討論亦適用 於其他微波,毫米波結構的漏波特性.第二章□,我們以格林函數及正確的 電流分布為基礎計算有蓋微條傳輸線之輻射場形.理論計算之結果發表於 第三章,並和無蓋微條傳輸線之輻射場形做一比較.最後我們將討論漏波輻 射場形之一般特性. We provide in this work a clear outlook of leaky wave and explore its radiation patterns. In chapter one, the focus is on the leaky phnomenon of microstrip line higher modes; general properties and physical explanations are given. Though the subject of study is the microstrip line, relevant discussions may well apply to other structures where leaky wave is concerned. In chapter two, rigorous formulas for the calculation of radiation patterns of top-covered microstrip line are derived by the use of Green's function and accurate current distribution. Chapter three shows the theoretical results, which will be compared with the radiation patterns of leaky microstrip line without top cover. Finally, we'll discuss the general characteristics of leaky wave radiation patterns.