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本文利用付里叶变换对具有和不具有空气间隙的矩形微带天线进行了严格的混合模分析,为推导付里叶变换域中的并矢格林函数,进行了新的矩阵研究,利用伽略金法推导出了谐振频率的特征方程。用数值求解该特征方程,以求得谐振频率。辐射方向图可从矩形贴片上的电流分布和格林函数求得,无须进行逆付里叶变换。本文最后给出了谐振频率和辐射方向图的数值结果,部分结果与文献中所得的实验结果相比较,其一致性很好。
In this paper, a rigorous mixed mode analysis is performed on a rectangular microstrip antenna with and without air gaps by Fourier transform. In order to derive the dyadic Green’s function in the Fourier transform domain, a new matrix is studied, Golden Law deduced the characteristic equation of resonant frequency. The characteristic equation is solved numerically to find the resonant frequency. The radiation pattern can be obtained from the current distribution on the rectangular patch and the Green’s function without the need of inverse Fourier transform. Finally, the numerical results of resonance frequency and radiation pattern are given. Some results are in good agreement with the experimental results obtained in the literature.