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An ultra‐wide stopband low‐pass filter using dual reverse U‐shaped DGS
Author(s) -
Hsiao PaiYi,
Weng RoMin
Publication year - 2008
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.23843
Subject(s) - stopband , attenuation , microstrip , microwave , ground plane , filter (signal processing) , materials science , band stop filter , low pass filter , physics , optoelectronics , electronic engineering , electrical engineering , optics , engineering , telecommunications , band pass filter , antenna (radio)
On the basis of the characteristics of defected ground structures (DGSs), a low‐pass filter (LPF) with a sharp rejection and an ultra‐wide stopband is constructed. The proposed LPF comprises of a dual reverse U‐shaped DGS along with two H‐shaped patterns on the ground plane and a microstrip line on the top layer. The attenuations are 2 and 32.8 dB at 3.7 and 3.85 GHz, respectively. The maximum attenuation rate is 205 dB/GHz. The proposed LPF achieves an ultra‐wide stopband with overall 20 dB attenuation from 3.75 GHz up to 20 GHz. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2780–2783, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23843