【摘要】 使用FDTD法对由两正交矩形波导构成的宽壁缝隙耦合器进行了严格的分析 .通过对两种类型缝隙 (纵向 /横向缝隙和斜向缝隙 )的分析 ,得出了耦合器在不同的波导尺寸及频率下散射系数、谐振长度的变化特性 ,这些结果与矩量法求得的结果完全吻合 .还利用得出的特性分析了一种带有短路器的耦合器系统 ,为缝隙阵天线的综合设计提供参考 .更多还原

【Abstract】 A rigorous analysis of a broad wall slot coupler composed of two crossed rectangular waveguides by using FDTD method is presented. Two types of slots, a longitudinal/transverse slot and a centered-inclined slot, are analyzed. Coupling slot characteristics are obtained, including scattering parameters and the resonant length for different waveguide dimensions and frequencies. The numerical results are all in good agreement with those by the method of moments. A coupler system with a short circuit port is also analyzed to help designing the slot array.更多还原