Non-Reciprocal Balanced Bandpass Filters With Quasi-Elliptic Response

Autor:	Dakotah Simpson, Photos Vryonides, Symeon Nikolaou, Dimitra Psychogiou
Rok vydání:	2022
Předmět:	Non-reciprocal filter Balanced filter Bandpass filter Non-reciprocity Isolator Microstrip filter Electrical and Electronic Engineering
Zdroj:	IEEE Transactions on Circuits and Systems II: Express Briefs. 69:5159-5163
ISSN:	1558-3791 1549-7747
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1ff12bb280d852cffce75ade28da486 https://doi.org/10.1109/tcsii.2022.3202860 Zobrazit plný text záznamu