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- Publisher Website: 10.1109/LMWC.2008.2001004
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Article: Stopband-expanded low-pass filters using microstrip coupled-line hairpin units
Title | Stopband-expanded low-pass filters using microstrip coupled-line hairpin units |
---|---|
Authors | |
Keywords | Attenuation poles Coupled-line hairpin unit Low-pass filter (LPF) Wide stopband |
Issue Date | 2008 |
Publisher | IEEE |
Citation | Ieee Microwave And Wireless Components Letters, 2008, v. 18 n. 8, p. 506-508 How to Cite? |
Abstract | In 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 Identifier | http://hdl.handle.net/10722/92857 |
ISSN | 2021 Impact Factor: 2.719 2020 SCImago Journal Rankings: 0.940 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Luo, S | en_HK |
dc.contributor.author | Zhu, L | en_HK |
dc.contributor.author | Sun, S | en_HK |
dc.date.accessioned | 2010-09-22T05:01:44Z | - |
dc.date.available | 2010-09-22T05:01:44Z | - |
dc.date.issued | 2008 | en_HK |
dc.identifier.citation | Ieee Microwave And Wireless Components Letters, 2008, v. 18 n. 8, p. 506-508 | en_HK |
dc.identifier.issn | 1531-1309 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/92857 | - |
dc.description.abstract | In 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.language | eng | en_HK |
dc.publisher | IEEE | en_HK |
dc.relation.ispartof | IEEE Microwave and Wireless Components Letters | en_HK |
dc.subject | Attenuation poles | en_HK |
dc.subject | Coupled-line hairpin unit | en_HK |
dc.subject | Low-pass filter (LPF) | en_HK |
dc.subject | Wide stopband | en_HK |
dc.title | Stopband-expanded low-pass filters using microstrip coupled-line hairpin units | en_HK |
dc.type | Article | en_HK |
dc.identifier.email | Sun, S:sunsheng@hku.hk | en_HK |
dc.identifier.authority | Sun, S=rp01431 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1109/LMWC.2008.2001004 | en_HK |
dc.identifier.scopus | eid_2-s2.0-49249088989 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-49249088989&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 18 | en_HK |
dc.identifier.issue | 8 | en_HK |
dc.identifier.spage | 506 | en_HK |
dc.identifier.epage | 508 | en_HK |
dc.identifier.isi | WOS:000258373400004 | - |
dc.publisher.place | United States | en_HK |
dc.identifier.scopusauthorid | Luo, S=7401985951 | en_HK |
dc.identifier.scopusauthorid | Zhu, L=7404201926 | en_HK |
dc.identifier.scopusauthorid | Sun, S=7404509453 | en_HK |
dc.identifier.issnl | 1531-1309 | - |