Design of a Dual-Mode Tunable Wide-Bandstop Filter with Controllable Bandwidth

被引：3
|
作者：
He, Z. -T. [1 ,2 ]
Wei, X. -B. [1 ,2 ]
Zhang, M. -X. [1 ]
Zhao, B. -L. [2 ]
Liao, J. -X. [1 ]
Wang, P. [1 ]
Xu, Z. -Q. [1 ]
Shi, Y. [2 ]
机构：
[1] Univ Elect Sci & Technol China, Res Inst Elect Sci & Technol, Chengdu 611731, Sichuan, Peoples R China
[2] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 611731, Sichuan, Peoples R China
来源：
ELECTROMAGNETICS | 2014年 / 34卷 / 05期
基金：
中国国家自然科学基金;
关键词：
bandstop filter; stepped-impedance resonator; tunable filters; tunable dual-mode resonator;
D O I：
10.1080/02726343.2014.910372
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：
In this article, a compact dual-mode tunable wide bandstop filter with controllable bandwidth is presented. The proposed filter consists of an open-loop stepped-impedance resonator with a T open stub loaded. Varactor diodes C-v1 and C-v2 are loaded at two ends of the stepped-impedance resonator and the loaded T stub, respectively. By properly adjusting the capacitances C-v1 and C-v2 of the varactor diodes, the constant fractional bandwidth and constant absolute bandwidth can be achieved, respectively. A new dual-mode tunable wide bandstop filter with 61.0% constant fractional bandwidth and 2.0-GHz constant absolute bandwidth has been designed and fabricated to verify the validity of the proposed method. The measured results are in good agreement with the electromagnetic simulation.
引用
收藏
页码：402 / 407
页数：6
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