圓柱型微帶洩漏波天線

Abstract

一般的洩漏波天線具有高增益、高輻射效率、低成本等優點。在本論文中，我們將研究圓柱型第一高階模洩漏波天線，此種結構除了擁有上述的優點外，它還具有形狀上的可容性。 我們將以S參數萃取法(S-parameter extraction technique)來得到第一高階模洩漏波天線的傳播常數。在實作上，我們利用槽孔耦合的方式來激發第一高階模，並使用軟性基板來達到彎曲的效果。 最後，我們也探討圓柱型洩漏波天線之間的耦合效應對傳播常數的影響

Generally, leaky wave antennas have the advantages: high gain, high radiation efficiency, low cost. In this thesis, we study the first higher order mode microstrip leaky-wave antennas on cylindrical structure. This structure of leaky wave antennas not only has the same advantages, but has conformal capability. We will investigate the propagation constants of the first higher order leaky mode of cylindrical microstrip lines by the leaky mode S-parameter extraction technique. We will implement the first higher order mode leaky wave antenna by aperture-coupled feeding network. We use the soft substrate to curve the antenna. Finally, We also study coupling effects between two cylindrical leaky wave antennas and learn the effects on propagation constants.