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A novel low‐pass filter using defected ground structures
Author(s) -
Guan XueHui,
Li GuoHui,
Ma Zhewang
Publication year - 2005
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.20888
Subject(s) - attenuation , microwave , filter (signal processing) , low pass filter , electronic engineering , substrate (aquarium) , engineering , band pass filter , topology (electrical circuits) , electrical engineering , physics , telecommunications , optics , oceanography , geology
In this paper, an equivalent‐circuit model of a defected ground structure (DGS) is applied to explain the characteristics of the DGS. The parameters of the circuit model are extracted from the EM‐simulation results. A novel three‐pole lowpass filter is proposed and optimized by using the defected ground structures. It is demonstrated that the filter can provide a sharp rate of attenuation in the stop‐band, as predicted. To further verify this method, the filter with DGS is fabricated on a 30 × 30 mm 2 substrate. A comparison between the simulation and the measurement confirms the effectiveness of the proposed schemes. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 17–20, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20888