Compact tunable lowpass filter with sharp roll-off and low insertion loss

Zhang, T; Cai, Z; Yang, Y; Bao, J; Wang, Y

Compact tunable lowpass filter with sharp roll-off and low insertion loss

Zhang, T

Cai, Z Yang, Y

Bao, J Wang, Y

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Publication Type:: Journal Article
Citation:: Microwave and Optical Technology Letters, 2017, 59 (10), pp. 2619 - 2623
Issue Date:: 2017-10-01

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Field	Value	Language
dc.contributor.author	Zhang, T https://orcid.org/0000-0001-6436-125X	en_US
dc.contributor.author	Cai, Z	en_US
dc.contributor.author	Yang, Y https://orcid.org/0000-0001-7439-2156	en_US
dc.contributor.author	Bao, J	en_US
dc.contributor.author	Wang, Y	en_US
dc.date.available	2020-05-25T19:23:15Z
dc.date.issued	2017-10-01	en_US
dc.identifier.citation	Microwave and Optical Technology Letters, 2017, 59 (10), pp. 2619 - 2623	en_US
dc.identifier.issn	0895-2477	en_US
dc.identifier.uri	http://hdl.handle.net/10453/121505
dc.description.abstract	© 2017 Wiley Periodicals, Inc. A novel continuously tunable lowpass filter (LPF) with compact size, sharp roll-off and low insertion loss is presented in this paper. The filter employs two varactor diodes, a pair of open-ended coupled lines and a U-shape step impedance line (SIL) with an open-ended stub loaded at the center of the SIL to form a very compact layout. The odd- and even-mode analysis and equivalent circuit model are demonstrated for estimation of the transmission characteristics. Tuning the DC voltage applied on the varactor diodes, the varactor capacitance accordingly changes leading to a varying cutoff frequency fc. The measured results show that the achieved 3-dB fc tuning range is 60.6% (1.15–2.15 GHz). The measured insertion loss (IL) and roll-off rate are 0.2-0.4 dB and 50–73 dB/GHz, respectively. The overall size of the LPF is only 0.005λg2, which shows a competitive advantage comparing with the state-of-the-art work.	en_US
dc.relation.ispartof	Microwave and Optical Technology Letters	en_US
dc.relation.isbasedon	10.1002/mop.30788	en_US
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Networking & Telecommunications	en_US
dc.title	Compact tunable lowpass filter with sharp roll-off and low insertion loss	en_US
dc.type	Journal Article
utslib.citation.volume	10	en_US
utslib.citation.volume	59	en_US
utslib.for	0205 Optical Physics	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	1005 Communications Technologies	en_US
pubs.embargo.period	Not known	en_US
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
pubs.organisational-group	/University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
utslib.copyright.status	open_access	*
pubs.issue	10	en_US
pubs.publication-status	Published	en_US
pubs.volume	59	en_US

Abstract:

© 2017 Wiley Periodicals, Inc. A novel continuously tunable lowpass filter (LPF) with compact size, sharp roll-off and low insertion loss is presented in this paper. The filter employs two varactor diodes, a pair of open-ended coupled lines and a U-shape step impedance line (SIL) with an open-ended stub loaded at the center of the SIL to form a very compact layout. The odd- and even-mode analysis and equivalent circuit model are demonstrated for estimation of the transmission characteristics. Tuning the DC voltage applied on the varactor diodes, the varactor capacitance accordingly changes leading to a varying cutoff frequency fc. The measured results show that the achieved 3-dB fc tuning range is 60.6% (1.15–2.15 GHz). The measured insertion loss (IL) and roll-off rate are 0.2-0.4 dB and 50–73 dB/GHz, respectively. The overall size of the LPF is only 0.005λg2, which shows a competitive advantage comparing with the state-of-the-art work.

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http://hdl.handle.net/10453/121505