Multilayer Reflectionless RF Bandpass Filters With Wideband Quasi-Constant Group-Delay Responses

Yang, L; Malki, M; Munoz-Ferreras, JM; Zhu, X; Gomez-Garcia, R

Multilayer Reflectionless RF Bandpass Filters With Wideband Quasi-Constant Group-Delay Responses

Yang, L Malki, M Munoz-Ferreras, JM Zhu, X

Gomez-Garcia, R

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Publisher:: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Publication Type:: Journal Article
Citation:: IEEE Transactions on Circuits and Systems I: Regular Papers, 2024, PP, (99)
Issue Date:: 2024-01-01

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Field	Value	Language
dc.contributor.author	Yang, L
dc.contributor.author	Malki, M
dc.contributor.author	Munoz-Ferreras, JM
dc.contributor.author	Zhu, X https://orcid.org/0000-0002-5814-394X
dc.contributor.author	Gomez-Garcia, R
dc.date.accessioned	2024-10-09T03:30:25Z
dc.date.available	2024-10-09T03:30:25Z
dc.date.issued	2024-01-01
dc.identifier.citation	IEEE Transactions on Circuits and Systems I: Regular Papers, 2024, PP, (99)
dc.identifier.issn	1549-8328
dc.identifier.issn	1558-0806
dc.identifier.uri	http://hdl.handle.net/10453/181307
dc.description.abstract	A class of reflectionless RF bandpass filters (BPFs) with wideband quasi-constant in-band group-delay response in transmission for high-data-rate digital-communication systems is presented. These BPFs are developed by exploiting multilayer wideband microstrip-to-microstrip vertical transitions and lossy multi-section microstrip lines in complementary-diplexer-based architectures. A two-port-reflectionless wideband BPF with low-in-band-variation equi-ripple-type group-delay characteristics is firstly realized by using two resistively-terminated one-section microstrip lines. To further flatten its passband group delay, its counterpart based on lossy two-section microstrip lines is then conceived to attain extremely-flat wideband group-delay pattern. Subsequently, by means of a modified wideband microstrip transition with a short-circuit-ended two-section microstrip line and a resistively-terminated two-section microstrip line, an input-reflectionless BPF with two close-to-passband transmission zeros (TZs) and wideband in-band flat group-delay profile is reported. In order to obtain a higher-order flat-group-delay wideband BPF response with more TZs, its structure shaped by two in-series-cascaded units of the previous input-absorptive BPF section with two TZs is engineered, in which different impedance values for their constituent short-circuit-ended microstrip lines are utilized. The operational foundations of all the proposed wideband flat-group-delay RF BPFs are described in detail. Furthermore, for practical-validation purposes, three 2-GHz microstrip prototypes of these reflectionless wideband RF BPFs with quasi-constant group-delay responses beyond their 3-dB absolute bandwidths (BWs) are designed, simulated, manufactured, and characterized.
dc.language	English
dc.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
dc.relation.ispartof	IEEE Transactions on Circuits and Systems I: Regular Papers
dc.relation.isbasedon	10.1109/TCSI.2024.3401089
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering
dc.subject.classification	Electrical & Electronic Engineering
dc.subject.classification	4009 Electronics, sensors and digital hardware
dc.title	Multilayer Reflectionless RF Bandpass Filters With Wideband Quasi-Constant Group-Delay Responses
dc.type	Journal Article
utslib.citation.volume	PP
utslib.for	0906 Electrical and Electronic Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Global Big Data Technologies Centre (GBDTC)
utslib.copyright.status	closed_access	*
dc.date.updated	2024-10-09T03:30:21Z
pubs.issue	99
pubs.publication-status	Published
pubs.volume	PP
utslib.citation.issue	99

Abstract:

A class of reflectionless RF bandpass filters (BPFs) with wideband quasi-constant in-band group-delay response in transmission for high-data-rate digital-communication systems is presented. These BPFs are developed by exploiting multilayer wideband microstrip-to-microstrip vertical transitions and lossy multi-section microstrip lines in complementary-diplexer-based architectures. A two-port-reflectionless wideband BPF with low-in-band-variation equi-ripple-type group-delay characteristics is firstly realized by using two resistively-terminated one-section microstrip lines. To further flatten its passband group delay, its counterpart based on lossy two-section microstrip lines is then conceived to attain extremely-flat wideband group-delay pattern. Subsequently, by means of a modified wideband microstrip transition with a short-circuit-ended two-section microstrip line and a resistively-terminated two-section microstrip line, an input-reflectionless BPF with two close-to-passband transmission zeros (TZs) and wideband in-band flat group-delay profile is reported. In order to obtain a higher-order flat-group-delay wideband BPF response with more TZs, its structure shaped by two in-series-cascaded units of the previous input-absorptive BPF section with two TZs is engineered, in which different impedance values for their constituent short-circuit-ended microstrip lines are utilized. The operational foundations of all the proposed wideband flat-group-delay RF BPFs are described in detail. Furthermore, for practical-validation purposes, three 2-GHz microstrip prototypes of these reflectionless wideband RF BPFs with quasi-constant group-delay responses beyond their 3-dB absolute bandwidths (BWs) are designed, simulated, manufactured, and characterized.

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http://hdl.handle.net/10453/181307