A design method for improvement of λ g /4 coupled‐line narrow bandpass filter response | Zendy

Prigent G. | Zendy; Rius E. | Zendy; Le Pennec F. | Zendy; Le Maguer S. | Zendy

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A design method for improvement of λ g /4 coupled‐line narrow bandpass filter response

Author(s) -

Prigent G.,

Rius E.,

Le Pennec F.,

Le Maguer S.

Publication year - 2003

Publication title -

microwave and optical technology letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.304

H-Index - 76

eISSN - 1098-2760

pISSN - 0895-2477

DOI - 10.1002/mop.11145

Subject(s) - band pass filter , resonator , microwave , microstrip , transmission line , line (geometry) , coupling (piping) , engineering , filter (signal processing) , electronic engineering , physics , electrical engineering , optoelectronics , topology (electrical circuits) , telecommunications , mathematics , mechanical engineering , geometry

This paper discusses various changes made in classical coupled‐line narrow bandpass filters to somehow improve frequency response. First, the resonator's strip width was broadened to improve the lines' unloaded Q factor. Second, the in/out coupled‐line sections were replaced by tapped‐line feeding. Finally, a transmission zero was added via a geometrical modification that favors nonadjacent resonator coupling. The theoretical and experimental results obtained with these microstrip filters are compared. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 39: 121–125, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11145

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