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

页码：402 / 407

页数：6

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