Design of wideband/dual-band bandpass filter using a vias and slots loaded sector circular patch resonator

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Article numbere22681
Journal / PublicationInternational Journal of RF and Microwave Computer-Aided Engineering
Volume31
Issue number7
Online published10 Apr 2021
Publication statusPublished - Jul 2021

Abstract

In this paper, a novel patch resonator is proposed to realize wideband and dual-band bandpass filter (BPF) with small frequency ratio. The introduction of metallic vias and slots on the patch enables the flexible control of the resonant frequencies of TM01, two degenerated modes of TM11, and TM21. Two stubs loaded on the patch and coupled with I/O feeding line can introduce two additional resonant modes, and facilitate the control of input/output coupling strength. Owing to the different coupling relationships between the stub modes and two degenerated modes of TM11, the transmission zeros (TZs) located at the center of passband can be eliminated or generated by altering their resonant order, thus realizing wideband or dual-band operation. For demonstration, two prototypes are simulated, fabricated and measured. Good agreement can be observed between simulation and measurement. The implemented wideband BPF has a passband from 1.85 GHz to 3.03 GHz with six transmission poles (TPs). While the implemented dual-band BPF operates at 1.8/2.45 GHz with three TPs within each band and two TZs between two bands. Small frequency ratio of 1.33 is achieved. Wide upper stopband and low insertion loss can be observed for both prototypes.

Research Area(s)

  • bandpass filter (BPF), dual-band, multi-mode resonator, patch resonator, small frequency ratio, wideband

Citation Format(s)

Design of wideband/dual-band bandpass filter using a vias and slots loaded sector circular patch resonator. / Tang, Wei Sheng; Xiang, Bing Jie; Zheng, Shao Yong; Long, Yun Liang.

In: International Journal of RF and Microwave Computer-Aided Engineering, Vol. 31, No. 7, e22681, 07.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review