Design of Triple-Passband Microwave Filters Using Frequency Transformations
Design of Triple-Passband Microwave Filters Using Frequency Transformations
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DOI：
10.1109/tmtt.2007.912206
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发表时间：
2008-01
影响因子：
4.3
通讯作者：
Juseop Lee;Kamal Sarabandi
中科院分区：
文献类型：
--
作者：
Juseop Lee;Kamal Sarabandi
本文介绍了一种三通带微波滤波器的综合方法。提出了一种用于确定三通带滤波器零极点位置的频率变换方法。这样获得的极点和零点被优化以实现具有减少的传输零点数目的传递函数，以便减少交叉耦合的数目。为了验证该方法的有效性，综合了六阶和十二阶三通带滤波器。用微带线结构制作了12极点三通带滤光片，实验结果与实验结果吻合较好。最后，简要讨论了非对称三通带滤波器的频率变换。
This paper introduces a synthesis method for triple-passband microwave filters. A frequency transformation is developed for finding the locations of poles and zeros of the triple-passband filter. The poles and zeros obtained as such are optimized to achieve a transfer function with a reduced number of transmission zeros in order to reduce the number of cross-couplings. Six- and 12-pole triple-passband filters are synthesized for validation of this proposed method. A 12-pole triple-passband filter is fabricated with a microstripline structure and shown to provide good agreement between synthesis and measurement results. Finally, the frequency transformation for asymmetric triple-passband filters is briefly discussed.