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A Study on The Design of Planer Comb-Line Bandpass Filter Using Equivalent Circuits of Asymmetrical Coupled Line  

Yun, Jae-Ho (순천향대학 정보기술공학부)
Park, Jun-Seok (순천향대학 정보기술공학부)
Kim, Hyeong-Seok (순천향대학 정보기술공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.51, no.8, 2002 , pp. 368-374 More about this Journal
Abstract
In this paper, we introduce a procedure to obtain a equivalent circuit of comb-line band pass filter. By employing equivalent circuits of each asymmetrical coupled line. we composed the full equivalent circuit of comb-line bandpass filter and derived simple design equations for extracting each line's impedance. To show the validity of design equations, we simulated and fabricated a planar type comb-line bandpass filter, which has center frequency 1.8㎓, band-width 50㎒ and four resonators. The resulting filter is very compact, have broad stop band with the second pass band centered at four times the center frequency of the first pass band. The experimental results show exact performances of design specification.
Keywords
Comb-Line type Band-Pass Filter; Equivalent circuit of Asymmetrical coupled lines; J-inverter;
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1 Hui-Wen Yao, Chi Wang and Kawthar A. Zaki, Quarter wavelength Ceramic Combline filters , IEEE Trans., vol. 44, No. 12, December 1996   DOI   ScienceOn
2 George L.Matthaei, Microwave Filters, Impedance-Matching Networks, And Coupling Structuresm, Artech House, Inc., pp. 497-506, 1980
3 M. Kirschning, R.H.Jansen and N.H.L.Koster, 'Accurate model for open and effect of microstrip lines', Electronics letters 5th Vol.17 No.3, february 1981   DOI
4 William J. Getsinger, 'Coupled Rectangular Bars Between Parallel Plate', IEEE Trans, MTT-10, No.1, January,1962   DOI
5 J. Helszajn, Microwave Planar Passive Circuits and Filters, John Wiley&sons, pp. 163-196, 1994
6 E.M.T Jones And J.T Bolljahn, 'Coupled-Strip-Transmission Line Filters And Directional Couplers'IRE Trans. PGMTT-4. No.2 pp. 75-81. April 1986   DOI
7 윤재호, 박효근, 박준석, 김형석, '유한요소해석을 이용한 비대칭 결합선로 설계', 대한전기학회 하계학술대회 논문지, pp. 1841-1843, 7월 2001