具有一层空气隙的矩形微带天线谱域导抗法

对具有一层空气隙的矩形微带天线进行了分析，利用谱域导抗矩阵推导出谱域中的并矢格林函数，利用伽略金法导出了谐振频率的本征方程，并从基片上表面切向电场分量的傅里叶变换直接得出辐射方向图．本文计算出的谐振频率和辐射方向图与其它的理论数值及文献中的测量结果相比较，其一致性很好．

SPECTRAL DOMAIN IMMITTANCE ANALYSIS OF A RECTANGULAR MICROSTRIP ANTENNA WITH AN AIR GAP

This paper presents an analysis of a rectangular microstrip antenna with an air gap. The Dyadic Green's function in the spectral domain is first derived by using the spectral domian immittance matrix approach. In this derivation process, all the wave pheno mena associated with the structure are Incorporated. Thed the eigenequation for resonant frequencies is derived by using Galerkin method. Finally Radiation patterns are directly obtained from the Fourier transforms of the tangential electric field components on the surface of the substrate. Comparision of the present numerical results for resonant frequencies and radiation patterns with other theoretical data is shown and indicates a extremely good agreement. Also several calculated results for resonant frequencies are compared with measured ones in the literature and excellent agreement is obtained.