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A compact bandpass filter using open‐loop and C‐SCMRC resonators with harmonic suppression
Author(s) -
Gu JianZhong,
Wang Chuang,
Sun XiaoWei
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.21514
Subject(s) - passband , band pass filter , stopband , resonator , elliptic filter , spurious relationship , microstrip , microwave , electronic engineering , filter (signal processing) , harmonic , physics , band stop filter , engineering , low pass filter , optoelectronics , acoustics , computer science , electrical engineering , telecommunications , machine learning
Abstract A novel compact open‐loop resonator bandpass filter is proposed to suppress the spurious passband using a compensated spiral compact microstrip resonant cell (C‐SCMRC). Due to the inherently compact and stopband characteristics of the C‐SCMRC, the proposed filters shows a better spurious‐rejection performance than the only open‐loop resonator filter. The proposed bandpass filter improves the rejection level of 20 dB from 2.8 to 5 GHz. Furthermore, 40‐dB suppression improvement and better than 57‐dB rejection level at the 2 nd ‐harmonic passband from 3.3 to 3.85 GHz are achieved. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 906–909, 2006; Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.21514