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Improved performance of stepped impedance resonator low‐pass filter by using defect ground structure
Author(s) -
Weng MinHung,
Pan ChiHsiang,
Shao ChihWei,
Wu HungWei
Publication year - 2004
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.20477
Subject(s) - resonator , helical resonator , electrical impedance , acoustics , materials science , filter (signal processing) , dielectric resonator antenna , electronic engineering , electrical engineering , engineering , optoelectronics , physics
A stepped impedance resonator (SIR) low‐pass filter using defect ground structure (DGS), which has high isolation and compact size, is proposed. The proposed defect ground structure (DGS) provides excellent cutoff and stopband characteristics for improving the stopband rejection and the attenuation rate of the bandpass edge. In order to illustrate the improved performance, we compare the conventional low‐pass filter and the proposed novel low‐pass filter with DGS. The measurement results of the fabricated low‐pass filter show excellent agreement with the theoretical results. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 43: 382–384, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20477