Balanced Dual-Band Superconducting Filter Using Stepped-Impedance Resonators with High Band-to-Band Isolation and Wide Stopband

Tang, J; Liu, H; Yang, Y

Balanced Dual-Band Superconducting Filter Using Stepped-Impedance Resonators with High Band-to-Band Isolation and Wide Stopband

Tang, J Liu, H Yang, Y

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Publisher:: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Publication Type:: Journal Article
Citation:: IEEE Transactions on Circuits and Systems II: Express Briefs, 2021, 68, (1), pp. 131-135
Issue Date:: 2021-01-01

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Field	Value	Language
dc.contributor.author	Tang, J
dc.contributor.author	Liu, H
dc.contributor.author	Yang, Y https://orcid.org/0000-0001-7439-2156
dc.date.accessioned	2022-03-19T23:02:24Z
dc.date.available	2022-03-19T23:02:24Z
dc.date.issued	2021-01-01
dc.identifier.citation	IEEE Transactions on Circuits and Systems II: Express Briefs, 2021, 68, (1), pp. 131-135
dc.identifier.issn	1549-7747
dc.identifier.issn	1558-3791
dc.identifier.uri	http://hdl.handle.net/10453/155375
dc.description.abstract	A balanced dual-band and wide-stopband high- temperature superconducting (HTS) bandpass filter (BPF) with deep stopband rejection is designed using modified stepped impedance resonators (SIRs) in this brief. The center frequencies of the two differential-mode (DM) passbands can be controlled by adjusting two electrical length ratios of the proposed SIR, while keeping the third spurious frequency far away for wide-stopband design. An inherent common-mode (CM) suppression can also be obtained due to the discriminating CM resonant frequencies different from the DM ones. Multiple transmission zeros (TZs) are achieved to realize high passband selectivity and enhanced DM stopband by multipath coupling and shunt stubs loaded on the I/O ports. The proposed balanced dual-band filter operating at 1.78/4.0 GHz is eventually fabricated using HTS YBCO thin films on a MgO substrate, which can significantly lower the insertion losses. The circuit was measured at the temperature of 77 K, which shows maximum insertion losses of 0.42/0.37 dB and a DM stopband of 5.0 f 1d with 40-dB attenuation, respectively.
dc.language	English
dc.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
dc.relation.ispartof	IEEE Transactions on Circuits and Systems II: Express Briefs
dc.relation.isbasedon	10.1109/TCSII.2020.3001258
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering
dc.subject.classification	Electrical & Electronic Engineering
dc.title	Balanced Dual-Band Superconducting Filter Using Stepped-Impedance Resonators with High Band-to-Band Isolation and Wide Stopband
dc.type	Journal Article
utslib.citation.volume	68
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/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2022-03-19T23:02:23Z
pubs.issue	1
pubs.publication-status	Published
pubs.volume	68
utslib.citation.issue	1

Abstract:

A balanced dual-band and wide-stopband high- temperature superconducting (HTS) bandpass filter (BPF) with deep stopband rejection is designed using modified stepped impedance resonators (SIRs) in this brief. The center frequencies of the two differential-mode (DM) passbands can be controlled by adjusting two electrical length ratios of the proposed SIR, while keeping the third spurious frequency far away for wide-stopband design. An inherent common-mode (CM) suppression can also be obtained due to the discriminating CM resonant frequencies different from the DM ones. Multiple transmission zeros (TZs) are achieved to realize high passband selectivity and enhanced DM stopband by multipath coupling and shunt stubs loaded on the I/O ports. The proposed balanced dual-band filter operating at 1.78/4.0 GHz is eventually fabricated using HTS YBCO thin films on a MgO substrate, which can significantly lower the insertion losses. The circuit was measured at the temperature of 77 K, which shows maximum insertion losses of 0.42/0.37 dB and a DM stopband of 5.0 f 1d with 40-dB attenuation, respectively.

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http://hdl.handle.net/10453/155375