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Article: Stopband-expanded low-pass filters using microstrip coupled-line hairpin units

TitleStopband-expanded low-pass filters using microstrip coupled-line hairpin units
Authors
KeywordsAttenuation poles
Coupled-line hairpin unit
Low-pass filter (LPF)
Wide stopband
Issue Date2008
PublisherIEEE
Citation
Ieee Microwave And Wireless Components Letters, 2008, v. 18 n. 8, p. 506-508 How to Cite?
AbstractIn this letter, a class of stopband-expanded low-pass filters (LPFs) is proposed via attenuation poles of microstrip coupled-line hairpin unit. By centrally tap-connecting this coupled-line unit and adjusting its coupling strength, three attenuation poles can be excited above the desired low passband. A coupled-line-oriented closed-form model is then constructed to provide a physical insight into the excitation of these poles and to execute an efficient synthesis design of this LPF. Two prototype filters with single and two units are finally designed with the specified cutoff frequency at 2.5 GHz. Measured results of the fabricated filters evidently demonstrate good LPF performance, sharp roll-off skirt, and a wide upper-stopband of 3.2 to 11.8 GHz with the insertion loss higher than 20.0 dB. © 2008 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/92857
ISSN
2015 Impact Factor: 1.599
2015 SCImago Journal Rankings: 0.942
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLuo, Sen_HK
dc.contributor.authorZhu, Len_HK
dc.contributor.authorSun, Sen_HK
dc.date.accessioned2010-09-22T05:01:44Z-
dc.date.available2010-09-22T05:01:44Z-
dc.date.issued2008en_HK
dc.identifier.citationIeee Microwave And Wireless Components Letters, 2008, v. 18 n. 8, p. 506-508en_HK
dc.identifier.issn1531-1309en_HK
dc.identifier.urihttp://hdl.handle.net/10722/92857-
dc.description.abstractIn this letter, a class of stopband-expanded low-pass filters (LPFs) is proposed via attenuation poles of microstrip coupled-line hairpin unit. By centrally tap-connecting this coupled-line unit and adjusting its coupling strength, three attenuation poles can be excited above the desired low passband. A coupled-line-oriented closed-form model is then constructed to provide a physical insight into the excitation of these poles and to execute an efficient synthesis design of this LPF. Two prototype filters with single and two units are finally designed with the specified cutoff frequency at 2.5 GHz. Measured results of the fabricated filters evidently demonstrate good LPF performance, sharp roll-off skirt, and a wide upper-stopband of 3.2 to 11.8 GHz with the insertion loss higher than 20.0 dB. © 2008 IEEE.en_HK
dc.languageengen_HK
dc.publisherIEEEen_HK
dc.relation.ispartofIEEE Microwave and Wireless Components Lettersen_HK
dc.subjectAttenuation polesen_HK
dc.subjectCoupled-line hairpin uniten_HK
dc.subjectLow-pass filter (LPF)en_HK
dc.subjectWide stopbanden_HK
dc.titleStopband-expanded low-pass filters using microstrip coupled-line hairpin unitsen_HK
dc.typeArticleen_HK
dc.identifier.emailSun, S:sunsheng@hku.hken_HK
dc.identifier.authoritySun, S=rp01431en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1109/LMWC.2008.2001004en_HK
dc.identifier.scopuseid_2-s2.0-49249088989en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-49249088989&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume18en_HK
dc.identifier.issue8en_HK
dc.identifier.spage506en_HK
dc.identifier.epage508en_HK
dc.identifier.isiWOS:000258373400004-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLuo, S=7401985951en_HK
dc.identifier.scopusauthoridZhu, L=7404201926en_HK
dc.identifier.scopusauthoridSun, S=7404509453en_HK

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