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A tunable open ring coupling structure and its application in fully tunable bandpass filter

Published online by Cambridge University Press:  03 May 2019

Zhonghai Zhang Open the ORCID record for Zhonghai Zhang [Opens in a new window] ,
Fei Zhao  and
Aiting Wu
Zhonghai Zhang*
Affiliation:
School of Electronic Information, Hangzhou Dianzi University, 310018 Hangzhou, China
Fei Zhao
Affiliation:
Science and Technology On Blind Signal Processing Laboratory, Southwest Electronics and Telecommunication Technology Research Institute, Chengdu, Sichuan 610041, China
Aiting Wu
Affiliation:
School of Electronic Information, Hangzhou Dianzi University, 310018 Hangzhou, China
*
Author for correspondence: Zhonghai Zhang, E-mail: zhanghaidong6388@163.com
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Abstract

This letter presents a novel tunable coupling structure to simplify the design complexity of the miniaturized fully tunable filter by using open ring and varactors. Based on the proposed novel tunable coupling structure, a fully tunable bandpass filter is implemented with independently tunable operating frequency and bandwidth. The tunable resonator and tunable coupling structure can be easily combined to improve Out-of-band suppression performance. The design procedure of a fully tunable bandpass filter consists of five tunable cavities and tunable coupling rings is also proposed. A prototype of the proposed fully tunable filter is built to verify the design experimentally. Good agreement between simulated and measured results is obtained.

Keywords

Fully tunable filterrectangular open ringtunable coupling structure
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 11 , Issue 8 , October 2019 , pp. 782 - 786
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019 

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References

1.Mao, JR, Che, WQ, Choi, WW, Tam, KW and Xue, Q (2013) Fully tunable filter design using tunable transformers and multiple mode resonators. 2013 IEEE International Wireless Symposium (IWS), Beijing, pp. 1–3.Google Scholar
2.Chi, PL, Yang, T and Tsai, TY (2015) A fully tunable two-pole bandpass filter. IEEE Microwave Wireless Component Letter 25, 292–294.Google Scholar
3.Chen, ZH and Chu, QX (2016) Wideband fully tunable bandpass filter based on flexibly multi-mode tuning. IEEE Microwave Wireless Component Letter 26, 789–790.Google Scholar
4.Dakotah, JS and Dimitra, P (2018) Coupling matrix-based design of fully reconfigurable differential/balanced RF filters. IEEE Microwave Wireless Component Letter 28, 888–890.Google Scholar
5.Wang, SX, Zhou, DF, Zhang, DW and Han, ST (2017) Dual-band bandpass filter using loop resonator with independently-tunable passband. ELECTRONICS LETTERS 53, 1655–1657.Google Scholar
6.Roberto, GG, Dimitra, P and Dimitrios, P (2017) Fully-tunable filtering power dividers exploiting dynamic transmission-zero allocation. IET Microwaves Antennas & Propagation 11, 378–385.Google Scholar
7.Chen, CF, Wang, GY and Li, JJ (2018) Microstrip switchable and fully tunable bamdpass filter with continuous frequency tuning range. IEEE Microwave Wireless Component Letter 28, 500–502.Google Scholar
8.Lu, D, Tang, XH, Barker, NS, Li, M and Yan, TF (2018) Synthesis-applied highly selective tunable dual-mode BPF with element-variable coupling matrix. IEEE Transactions on Microwave Theory and Technology 66, 1804–1816.Google Scholar
9.Adhikari, S, Ghiotto, A and Wu, K (2013) Simultaneous electric and magnetic two-dimensionally tuned parameter-agile SIW devices. IEEE Transactions on Microwave Theory and Techniques 61, 423–435.Google Scholar
10.Bahram, Y, Yu, M and Brian, K (2012) A –Ka band fully tunable cavity filter. IEEE Transactions on Microwave Theory and Technology 60, 4002–4012.Google Scholar
11.Himanshu, J, Sigmarsson, HH, Moon, S, Peroulis, D and Chappel, WJ (2009) High-Q fully reconfigurable tunable bandpass filters. IEEE Transactions on Microwave Theory and Technology 57, 3525–3533.Google Scholar
12.Dimitra, P, Roberto, GG and Dimitrios, P (2016) Fully-reconfigurable bandpass/bandstop filters and Teir coupling-matrix representation. IEEE Microwave Wireless Component Letter 26, 22–24.Google Scholar
13.Akash, A and Liu, XG (2016) Reconfigurable planar capacitive coupling in subsrtate-integrated Coaxial-cavity filters. IEEE Transactions on Microwave Theory and Technology, 64, 2548–2560.Google Scholar