Technique for improving out-of-band characteristics of planar microwave filters using tapped resonators

被引：0
|
作者：
Wada, Kouji [1 ]
Nakagawa, Kouichi [1 ]
Hashimoto, Osamu [1 ]
Harada, Hiroshi [2 ]
机构：
[1] Aoyama Cakuin University, Japan
[2] Yokogawa Denshikiki, Co., Ltd.
来源：
IEICE Transactions on Electronics | 2002年 / E85-C卷 / 02期
关键词：
Computer simulation - Electric loads - Printed circuit boards - Resonators - Spurious signal noise;
D O I：
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学科分类号：
摘要：
A simple method for improving out-of-band characteristics of a planar microwave filter is proposed. We clarify the close relationship among 'tap connection,' 'attenuation pole' and 'spurious responses' in filter design, theoretically and experimentally. Firstly, the basic characteristics of the resonator depending on the excitation method are examined. We show that skirt characteristics can be improved and spurious responses can be suppressed by using the tap connection technique. Secondly, the application examples of bandpass filters (BPFs) on the basis of the resonator with our principle are provided. It is confirmed that the resonator depending on the excitation method is useful for improving out-of-band characteristics of the planar microwave filter.
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页码：391 / 399
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