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A novel fractal defected ground structure and its application to the low‐pass filter
Author(s) -
Liu Hai W.,
Li Zheng F.,
Sun Xiao W.
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.11246
Subject(s) - ground plane , fractal , microwave , stopband , cutoff , microstrip , fractal antenna , electronic engineering , low pass filter , cutoff frequency , acoustics , topology (electrical circuits) , filter (signal processing) , engineering , band pass filter , electrical engineering , physics , mathematics , mathematical analysis , telecommunications , microstrip antenna , antenna factor , quantum mechanics , antenna (radio)
A novel fractal defected ground structure (DGS) for the microstrip line is proposed. The DGS unit lattice is realized by replacing the etched rectangular holes in ground plane with a Sierpinski carpet. The proposed fractal DGS can provide better bandgap, slow‐wave characteristics, and selectivity at cutoff than the conventional dumbbell‐shaped DGS. Furthermore, the fractal DGS is applied effectively to design a low‐pass filter (LPF). A comparison between simulation and measurement confirms the validity of the LPF configuration and design procedure. A simple structure and high‐power handling capability are obtained from the proposed LPF. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 39: 453–456, 2003