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一种新型左手介质栅波导滤波特性的分析

Keywords: 左手介质,周期结构,介质栅,滤波结构

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Abstract:

提出了一种新型的基于左手介质的介质栅波导阻带滤波结构,并采用多模网络与严格模匹配相结合的方法,对该左手介质栅波导阻带滤波特性进行仔细严格的分析;给出了主模的Brillouin图,以及滤波结构的归一化中心频率、阻带的宽度和带内最大衰减等特性和结构参数的关系,并与传统右手介质栅波导作了比较,说明了产生两者不同特性的原因.数值结果表明左手介质栅波导的阻带带宽和带内衰减要比通常介质栅波导的阻带带宽和带内衰减大得多.这些计算结果对于所提新型带阻滤波结构的设计有指导意义.

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