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http://dx.doi.org/10.6109/JKIICE.2009.13.4.636

Characteristics of High Efficiency Wideband Microstrip Band Pass Filter  

Lee, Young-Hun (금오공과대학교 전자공학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.13, no.4, 2009 , pp. 636-644 More about this Journal
Abstract
This paper presents a compact, low insertion loss, sharp rejection and wide band microstrip band pass filter that is composed rectangular loop resonator and step-impedance-open-stub(SIOS) for wireless data communication. The SIOS can be reduce length about 30% more than general $0.25{\lambda}$ stub. And the stub can the advantage of tuning impedance magnitude. In order to demonstrate agrement of this paper prove, the optimized wide band pass filters are realized and experimented. A transmission line model used to calculate the frequency response of the new filters shows good agreement with measurements. The filter has 3dB fractional bandwith of 52.5%(3.267GHz), an insertion loss of better than 0.33dB from 4.587GHz to 7.854GHz, and two rejection of greater than 30dB within 221MHz$(4.366GHz{\sim}4.587GHz)$ at low frequency band, 181MHz$(7.854GHz{\sim}8.035GHz)$ at high frequency band. Maximum rejection characteristics of the filter are -54dB at low frequency and -60dB at high frequency.
Keywords
wide bandpass filter; step-impedance-open-stub; perturbation; sharp rejection;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 K. Chang, Microwave Ring Circuits and Antennas. New York: Wiley, 1996
2 M. Matsuo, H. Yabuki, and M. Makimoto, ""Dual-mode steppedimpedance ring resonator for bandpass filter applications,"" IEEE Trans. Microwave Theory Tech., vol. 49, pp. 1235–-1240, July 2001   DOI   ScienceOn
3 J.R. LEE, J.H. Cho, S.W. Yun, "New Compact Bandpass filter Using Microstrip Resonators with Open Stub Inverter", IEEE Microwave and Guided Wave Letters, Vol. 10, No.12, pp.526-527, Dec. 2000   DOI   ScienceOn
4 J. S. Hong, M. Lancaster, D. Jedamzik, and R. B. Greed, "On the development of superconducting microstrip filters for mobile communications applications," IEEE Trans. Microwave Theory Tech., vol. 47, pp.1656–-1663, Sept. 1999   DOI   ScienceOn
5 L. Zhu and K. Wu, ""A joint field/circuit model of line-to-ring coupling structures and its application to the design of microstrip dual-mode filters and ring resonator circuits,"" IEEE Trans. Microwave Theory Tech, vol. 47, pp. 1938–-1948, Oct. 1999   DOI   ScienceOn
6 L.-H. Hsieh and K. Chang, "Dual-mode quasi- elliptic-function bandpass filters using ring resonators with enhanced-coupling tuning stubs," IEEE Trans. Microwave Theory Tech., vol. 50, pp. 1340–-1345, May 2002   DOI   ScienceOn
7 L.-H. Hsieh and K. Chang, ""Compact dual-mode elliptic-function bandpass filter using a single ring resonator with one coupling gap,"" Electron. Lett., vol. 36, no. 19, pp. 1626–-1627, Sept. 2000   DOI   ScienceOn
8 이영훈 외, '무선데이터 통신을 위한 고효율 광대역 마이크로스트립 대역통과 필터 특성에 관한 연구', 전기전자학회논문지, 12(4), pp. 225- 232, 2008년 12월