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Stopband-expanded low-pass filters using microstrip coupled-line hairpin units
Luo, S.; Zhu, L.; Sun, S.
2008-08-01
Source PublicationIEEE Microwave and Wireless Components Letters
ISSN1531-1309
Volume18Issue:8Pages:506-508
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.

KeywordAttenuation Poles Coupled-line Hairpin Unit Lowpass Filter Wide Stopband
DOI10.1109/LMWC.2008.2001004
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000258373400004
The Source to ArticlePB_Publication
Scopus ID2-s2.0-49249088989
Fulltext Access
Citation statistics
Cited Times [WOS]:85   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Corresponding AuthorZhu, L.
Recommended Citation
GB/T 7714
Luo, S.,Zhu, L.,Sun, S.. Stopband-expanded low-pass filters using microstrip coupled-line hairpin units[J]. IEEE Microwave and Wireless Components Letters,2008,18(8):506-508.
APA Luo, S.,Zhu, L.,&Sun, S..(2008).Stopband-expanded low-pass filters using microstrip coupled-line hairpin units.IEEE Microwave and Wireless Components Letters,18(8),506-508.
MLA Luo, S.,et al."Stopband-expanded low-pass filters using microstrip coupled-line hairpin units".IEEE Microwave and Wireless Components Letters 18.8(2008):506-508.
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