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具有多传输零点的微带传输线滤波器设计

DOI: 10.13190/jbupt.201205.77.zhuyzh, PP. 77-80

Keywords: 滤波器,传输线,传输零点,奇偶模

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Abstract:

提出一种非对称两腔发夹型滤波器的设计方法.应用传输矩阵分析了2种串联传输线型谐振器与传输响应零点之间的关系,依据奇偶模激励法得出了并联耦合型传输线滤波器的传输响应公式,结合这些特点,设计了一种可以产生3个传输零点的两腔滤波器,在含源负载交叉耦合的情况下,突破了现有滤波器N个谐振器才能产生N个传输零点的局限,进一步提高了滤波器的频带选择特性.实测结果验证了该方法的正确性.

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