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Parallel‐coupled bandpass filters with broad rejection band using interdigital fingers and DGS
Author(s) -
Her ManLong,
Ko Wen,
Hsu MingWei,
Wang YuLin,
Hsu ChouJung
Publication year - 2006
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.21449
Subject(s) - band pass filter , harmonics , spurious relationship , resonator , bandwidth (computing) , electronic engineering , attenuation , microwave , band stop filter , computer science , engineering , physics , electrical engineering , telecommunications , low pass filter , optics , voltage , machine learning
A novel parallel‐coupled bandpass filter (PC‐BPF) with a fundamental frequency of 2.4 GHz is presented in this paper. This proposed filter achieves a broad rejection bandwidth and a sufficient attenuation level by using the distributed interdigital fingers to attenuate the spurious even harmonics of 2f 0 and 4f 0 , and employing a defected ground structure (DGS) resonator to suppress the 3f 0 spurious response. The measured results show a satisfactory rejection bandwidth of 8.6 GHz with a rejection level of −30 dB at 2f 0 . The improved performance will be very attractive for application in many communication systems. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 705–707, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21449