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A novel defected ground structure and its application to a lowpass filter
Author(s) -
Li GuoHui,
Jiang XinHua,
Zhong XiaoMing
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.21750
Subject(s) - low pass filter , microwave , cutoff frequency , parametric statistics , cutoff , equivalent circuit , electronic engineering , engineering , filter (signal processing) , band pass filter , electrical engineering , topology (electrical circuits) , physics , telecommunications , mathematics , voltage , statistics , quantum mechanics
A novel defected ground structure (DGS) with two semicircular defected areas is investigated for low pass filter (LPF) applications. An equivalent lumped L‐C circuit model is presented and its corresponding L‐C parameters are also extracted by using parametric relationships. With this structure, the effect of the defected parameters on performance is detailed. Based on the equivalent circuit model, a 3‐pole LPF, using 2 DGS units, is optimally designed and implemented. The results from experiments confirm that the designed LPF can provide a very wide stop band, which is approximately 3.7 times of the cutoff frequency. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1760–1763, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21750