Non-reciprocal balanced bandpass filters with quasi-elliptic response
Loading...
Files
Date
2022-08-30
Authors
Simpson, Dakotah
Vryonides, Photos
Nikolaou, Symeon
Psychogiou, Dimitra
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Published Version
Abstract
This paper reports on the RF design and practical development of a non-reciprocal balanced bandpass filter (BPF) that exhibits a highly-selective quasi-elliptic response in the forward direction of propagation that is shaped by four transmission poles and two transmission zeros (TZs). By modulating some of the filterâ s resonators with phase-progressed AC signals, a non-reciprocal response is obtained in the differential mode. Its common-mode is also highly suppressed due to the incorporation of a balanced network that results in two additional TZs and resistive loss that are unique to the common-mode. The filter order can be increased by cascading additional resonators. For validation purposes, a microstrip prototype centered at 725 MHz was designed, manufactured, and measured. It showed a high isolation in the differential-mode reverse transmission of up to 62.1 dB. Moreover, the common-mode was suppressed by over 45 dB in a bandwidth greater than one octave.
Description
Keywords
Balanced filter , Bandpass filter , Isolator , Microstrip filter , Non-reciprocal filter , Non-reciprocity
Citation
Simpson, D., Vryonides, P., Nikolaou, S. and Psychogiou, D. (2022) 'Non-reciprocal balanced bandpass filters with quasi-elliptic response', IEEE Transactions on Circuits and Systems II: Express Briefs. doi: 10.1109/TCSII.2022.3202860
Link to publisher’s version
Copyright
© 2022, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.