【摘要】 对具有圆形匹配台阶和圆形铁氧体样品的Ｈ 面波导Ｙ 结环行器进行了计算机辅助分析（ＣＡＡ）和计算机辅助设计（ＣＡＤ）。ＣＡＡ 以全波分析为基础，包括了在实际的Ｈ 面波导结中各种可能存在的模式，分析是完备的。ＣＡＤ是通过计算波导结的相对输入阻抗随各设计参数的变化规律进行的。因为设计参数繁多和场型的三维结构，直接计算环行器性能已较困难，对其优化就更为麻烦。本文首先计算无大匹配台阶的中心结阻抗特性，再由此综合出外匹配电路。环行器的最后性能可由中心结结合匹配台阶一起计算验证之。此外，本文模型不仅包括了濎濜波长变换器的大台阶，还包括了该台阶上与铁氧体样品同直径的小台阶更多还原

【Abstract】 In this thesis, a mathematics model of the H plane wave guide Y junction circulator is established based on the full wave analysis, which including not only the classic 1/4 wavelength impedance transformer but also another circular metal step on which the ferrite disk with the same diameter is placed. A set of CAA (computer aided analysis) software is developed. The design parameters of the center junction are too complicated (3D field )and arbitrary to optimize, although it is relatively easy to compute directly the performance perhaps. In order to overcome the difficulty,this paper firstly computes the impedance/ admittance of the center junction, and then, in terms of that synthesizes the matching circuit parameters (CAD).The last performance must be identified by using the CAA soft ware with all design parameters which are obtained from CAD.更多还原