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A compact ultra‐wideband band‐pass filter with defected ground structure
Author(s) -
Chen Peng,
Wei Feng,
Shi Xiaowei,
Huang Qiulin
Publication year - 2009
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.24234
Subject(s) - stopband , microwave , wideband , bandwidth (computing) , resonator , insertion loss , fractional bandwidth , attenuation , passband , band pass filter , ultra wideband , electronic engineering , optoelectronics , physics , engineering , materials science , electrical engineering , telecommunications , optics
In this article, a compact ultra‐wideband (UWB) band‐pass filter (BPF) with improved upper‐stopband is presented. In this design, a novel multiple‐mode resonator (MMR) with two symmetrical loading stubs and three dumbbell‐shaped defected ground structures (DGS) on the back of the filter improve the harmonic‐suppression characteristic of conventional BPF. Combining these two structures, a new UWB BPF is fabricated and measured. Measured results show that the proposed BPF has wide bandwidth from 3.0 to 10.7 GHz, and the insertion loss of the BPF is less than 1.0 dB in this band. A wide stop‐band bandwidth with 20 dB attenuation from 12 GHz up to 20 GHz is achieved. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 979–981, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24234