电子科技大学学报2024，Vol.53Issue(3)：359-365,7.DOI:10.12178/1001-0548.2023202
基于阶跃阻抗谐振器的四阶频率可调滤波器设计
Design of Fourth-Order Frequency Tunable Bandpass Filter Using Varactor-Loaded Step-Impedance Resonators
李双 1李胜先 1刘军 1张能 1史曼1
作者信息
- 1. 西安空间无线电技术研究所,西安 710100
- 折叠
摘要
Abstract
In this article,a compact fourth-order frequency tunable Bandpass Filter(BPF)with four Transmission Zeros(TZs)based on Varactor-Loaded Step-Impedance Resonators(VL-SIRs)is presented.With the utilization of VL-SIRs,the Tuning Range(TR)of the proposed fourth-order BPF is improved.Besides,by introducing cross coupling between VL-SIRs,a pair of TZs close to the passband are produced and the selectivity of the filter is enhanced significantly.Another pair of TZs are generated to improve the out-of-band rejection by using source-load coupling.Moreover,the Frequency-Dependent Coupling(FDC)structures based on VL-SIRs are employed to realize constant Absolute Bandwidth(ABW).The simulated and measured results are presented and show good agreement.The measured results exhibit a tuning range from 0.78 GHz to 1.15 GHz with a 3 dB constant ABW of about 55±3 MHz,the return loss of the filter is greater than 10 dB and the insertion loss is about 2.8 dB to 3.3 dB.关键词
带通滤波器/微带/可调滤波器/变容管加载的阶跃阻抗谐振器Key words
bandpass filter/microstip/tunable filter/varactor-loaded step impedance resonator分类
信息技术与安全科学引用本文复制引用
李双,李胜先,刘军,张能,史曼..基于阶跃阻抗谐振器的四阶频率可调滤波器设计[J].电子科技大学学报,2024,53(3):359-365,7.
