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Dual-/tri-band bandpass filters with fully independent and controllable passband based on multipath-embedded resonators

Published online by Cambridge University Press:  30 September 2020

Yang Xiong Open the ORCID record for Yang Xiong [Opens in a new window] ,
Wei Zhang ,
Yue-Peng Zhong  and
Li-Tian Wang
Yang Xiong
Affiliation:
Southwest China Institute of Electronic Technology, Chengdu, 610036, China
Wei Zhang
Affiliation:
Chongqing Acoustic-Optic-Electronic Company, China Electronics Technology Group Corporation, Chongqing, 400060, China
Yue-Peng Zhong
Affiliation:
Southwest China Institute of Electronic Technology, Chengdu, 610036, China
Li-Tian Wang*
Affiliation:
College of Electronic Information and Optical Engineering, Nankai University, Tianjin, 300350, China
*
Author for correspondence: Li-Tian Wang, E-mail: wanglitianrf@sina.com
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Abstract

In this paper, dual-band and tri-band bandpass filters (BPFs) with fully independent and controllable passbands based on multipath-embedded resonators are presented. The dual-band BPF consists of two double open-ended stub-loaded terminal-shorted resonators (DOESL-TSRs) with a common via-hole connected along the symmetric plane of the filter. Based on DOESL-TSRs, a triple open-ended stub-loaded terminal-shorted resonator (TOESL-TSR) is proposed in the design of tri-band BPFs. The resonant characteristics of DOESL-TSR/TOESL-TSR are analyzed by the numerical calculation method. The measured results of the dual-band BPF show that the center frequencies (CFs) are located at 2.595 and 5.75 GHz, respectively, with 3 dB fraction bandwidth (FBWs) of 15 and 12.8%. The measured CFs of the tri-band BPF are located at 2.545, 3.775, and 5.95 GHz, respectively, with 3 dB FBWs of 9.8, 9.3, and 5.5%. Both of the filters exhibit the merits of fully independent and controllable passbands, high selectivity, and compact size.

Keywords

Controllable passbanddual-band BPFmultipath propagationtransmission zerostri-band BPF
Type
Filters
Information
International Journal of Microwave and Wireless Technologies , Volume 12 , Special Issue 10: EuMCE 2019 Special Issue (Part II) , December 2020 , pp. 1012 - 1019
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Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press in association with the European Microwave Association

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