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Defected‐ground coupled microstrip lines bandpass filter with suppressed spurious resonances
Author(s) -
SalahEddin Muhammad A.,
Safwat Amr M. E.
Publication year - 2007
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.22590
Subject(s) - spurious relationship , stopband , band pass filter , microstrip , microwave , filter (signal processing) , section (typography) , physics , materials science , optics , electrical engineering , engineering , computer science , machine learning , operating system , quantum mechanics
Defected‐ground coupled microstrip lines (DCL) bandpass filter is proposed. The length of the proposed filter is quarter the length of conventional coupled‐line filter and it has a wide stopband and suppressed spurious resonances up to 4f 0 , where f 0 is the filter central frequency. Five hundred and fifty megahertz single‐section and two‐section DCL filters were designed and fabricated. Simulations and measurements show that the rejection levels of the spurious resonances at 2f 0 , 3f 0 as well as 4f 0 are better than −11 and −14 dB for single‐section DCL and double‐section DCL, respectively. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2038–2039, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22590