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A Design of Generalized Chebyshev LPF Using Defected Ground Structure  

Kim In-Seon (Agency for Defense Development)
Kim Jong-Wook (Division of Information Technology Engineering, Soonchunhyang University)
Ahn Dal (Division of Information Technology Engineering, Soonchunhyang University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.17, no.7, 2006 , pp. 673-683 More about this Journal
Abstract
In this paper, we investgate variation of phase and magnitude characteristics which become different as the variables of DGS are changed and propose the new method to easily decide the best optimum DGS pattern taking advantage of this trend. Generalized Chebyshev(GC) low pass filter(LPF) is designed by using DGS obtained from this method GC DGS LPF is more available for filter application than Chevyshev DGS LPF because GC LPF have parallel resonators as series circuits, therefore unlikely Chebyshev LPF, transform step of the series elements can be omitted. By using the proposed method, GC DGS LPF(N=5) and as a subject of comparison, conventional Chbyshev LPF(N=7) are designed and implementation. From the comparison of the measured data, we confirmed that the implemented GC DGS 5th order LPF have much better cutoff characteristics and reduce by 0.58 times size, on the other hand the stop bandwidth become widen about 1.57 times or more in comparison with the conventional Chevyshev 7th order LPF.
Keywords
Defected Ground Structure(DGS); Generalized Chebyshev(GC) Filter;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Jong-Sik Lim et al., 'Design of low-pass filter using defected ground structure', IEEE Transaction on Microwave Theory and Techniques, vol. 53, Issue 8, pp. 2539-2545, Aug. 2005   DOI   ScienceOn
2 J. E. Dean, 'Suspended substrate stripline filters for ESM applications', IEE Proceedings, vol. 132, no. 4, pp. 257-266, Jul. 1985   DOI
3 임종식, 김철수, 안달, 정용채, 남상욱, 김광수, '결함 접지 구조를 이용한 새로운 5-단 저역통과 여파기', 한국전자파학회논문지, 16(6), pp. 594-602, 2005년 6월   과학기술학회마을
4 박종임, 이수열, 김기태, 정재웅, 안달, 'Dumbbell 모양의 DGS(Defected Ground Structure) 구조에 대한 새로운 등가 전송선로 모델링', 추계 마이크로파 및 전파학술대회, 25(1), 2002년 5월
5 G. L. Matthaei, L. Young, and E. M. T. Jhones, Microwave Filters, Impedance-Matching Networks, and Coupling Structures, Artech House, pp. 86-88, 1980
6 Dal Ahn, 'DGS applications for RF and microwave circuits', KJMW, vol. 1, pp. 72-80, 2000
7 Dal Ahn, J. S. Park, and C. S. Kim et al., 'A design of the low-pass filter using the novel microstrip defected ground structure', IEEE Transaction on Microwave Theory and Techniques, vol. 49, no. 1, pp. 86-93, Jan. 2001   DOI   ScienceOn
8 J. D. Rhode, S. A. Alseyab, 'The generalized chebyshev low-pass prototype filter', Circuit Theory and Applications, vol. 8, pp. 113-125, 1980   DOI   ScienceOn
9 Jong Sik Lim, 'Defected ground structure for planar transmission lines and application to microwave circuits', Ph. D. thesis, Seoul National University, Dec. 2002