A Coplanar Waveguide Bandwidth-Tunable Lowpass Filter With Broadband Rejection

被引：18
|
作者：
Huang, Chia-Cheng [1 ]
Chen, Nan-Wei [1 ]
Tsai, Hsuan-Ju [2 ,3 ]
Chen, Jyun-Yu [4 ]
机构：
[1] Yuan Ze Univ, Dept Commun Engn, Jhongli 32003, Taiwan
[2] Natl Taiwan Univ, Dept Elect Engn, Taipei 10764, Taiwan
[3] Natl Taiwan Univ, Grad Inst Commun Engn, Taipei 10764, Taiwan
[4] Natl Cent Univ, Dept Elect Engineer, Jhongli, Taiwan
来源：
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2013年 / 23卷 / 03期
关键词：
Coplanar waveguide (CPW); insertion loss; tunable filter; varactor diode;
D O I：
10.1109/LMWC.2013.2242323
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A coplanar waveguide lowpass filter (CPW-LPF) with high bandwidth tunability and broadband rejection is demonstrated. Compared to the reported design approaches, a relatively straightforward design with varactor-tuned microwave resonators is proposed for the realization of the tunable CPW-LPF. It is shown that the presented tunable CPW-LPF has a wide bandwidth tuning range via a small bias swing, low passband insertion loss, as well as wideband rejection. Also, the filter roll-off remains unchanged while the cut-off frequency is varied. The proposed tunable CPW-LPF is experimentally verified and expected to find applications in modern communication systems.
引用
收藏
页码：134 / 136
页数：3
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