模式匹配法分析微带低通滤波器

Mode-matching method to analyse a lowpass microstrip filter

微带线介质填充的不均匀性增加了分析其场结构和不连续性的难度。为了解决这一问题,本文采用微带线等效波导模型与模式匹配相结合的方法,分析了一种简单微带低通滤波器。从文中可以看出,利用该方法分析微带滤波器,计算速度有较大的提高,同时将模式匹配法的数值计算结果与常用的微波仿真软件cst的仿真结果相比对,两者吻合的很好,证明了该方法的正确性。

Analysis of field and discontinuities in micro-strip is very difficult because of its unique structure. In this paper, a waveguide model and mode matching method are used to analyse a low-pasa microstrip filter. The solving speed was improved. In the end of this paper, the result getting from this method was compared with the CST result. Both of them matched well.