Selectivity-Enhancement Technique for Stepped-Impedance-Resonator Dual-Passband Filters

被引：56

作者：

Gomez-Garcia, Roberto ^{[1
]}

Yang, Li ^{[1
]}

Munoz-Ferreras, Jose-Maria ^{[1
]}

Psychogiou, Dimitra ^{[2
]}

机构：

[1] Univ Alcala, Dept Signal Theory & Commun, Polytech Sch, Madrid 28871, Spain

[2] Univ Colorado, Dept Elect Comp & Energy Engn, Boulder, CO 80309 USA

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2019年 / 29卷 / 07期

基金：

美国国家科学基金会;

关键词：

Bandpass filter (BPF); dual-band filter; microstrip filter; planar filter; selectivity-enhancement cell; stepped-impedance resonator (SIR); transmission zero (TZ);

D O I：

10.1109/LMWC.2019.2916458

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 class of stepped-impedance resonator (SIR) dual-band bandpass filter (BPF) with selectivity-enhancement cells is reported. These dual-band filtering cells, which are composed of two open-ended transmission-line segments interconnected at the input, are added at one node of the input and output coupled-line stages. Thus, with regard to the SIR dual-band BPF without cells, they increase the order of each passband by two and simultaneously generate transmission zeros (TZs) at both sides of the two transmission bands. The operating principles of the proposed dual-band BPF are detailed at the coupling-routing-diagram level and design guidelines for its transmission-line configuration are provided. Moreover, for experimental-validation purposes, a 1.57-GHz/2.38-GHz dual-band BPF microstrip prototype with symmetrical absolute bandwidths is manufactured and characterized.

引用

页码：453 / 455

页数：3

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