ETRI Journal

  • 제36권4호
  • /
  • Pages.690-693
  • /
  • 2014
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  • 1225-6463(pISSN)
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  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
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Quad-Band Bandpass Filter Using Quad-Mode Stub-loaded Resonators

  • Liu, Haiwen (College of Information Engineering, East China Jiaotong University) ;
  • Wang, Xiaomei (College of Information Engineering, East China Jiaotong University) ;
  • Wang, Yan (College of Information Engineering, East China Jiaotong University) ;
  • Li, Shen (College of Information Engineering, East China Jiaotong University) ;
  • Zhao, Yulong (College of Information Engineering, East China Jiaotong University) ;
  • Guan, Xuehui (College of Information Engineering, East China Jiaotong University)
  • 투고 : 2013.10.05
  • 심사 : 2014.01.11
  • 발행 : 2014.08.01
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초록

Compact multi-band bandpass filters using quad-mode stub-loaded resonators are proposed in this letter. Firstly, a novel approach about the mode-splitting characteristics of the quadruple-mode resonator is investigated, which can provide dual-band behavior. Secondly, a quad-band filter is proposed and designed by cascading two quadruple-mode resonators; the upper one operates at 1.8/2.4 GHz (GSM- and WiMax-band) and the lower one at 1.57/2.1 GHz (GPS- and WCDMA-band). Finally, the proposed filters have been fabricated. Respectable agreement between simulation and measurement verifies the validity of this design methodology.

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참고문헌

  1. C.T. Wang et al., "Novel Quasi-Elliptic Function Bandpass Filter Using Hexagonal Resonators with Capacitive Loading," ETRI J., vol. 30, no. 4, Aug. 2008, pp. 615-617. https://doi.org/10.4218/etrij.08.0208.0111
  2. H.W. Wu and R.Y. Yang, "A New Quad-Band Bandpass Filter Using Asymmetric Stepped Impedance Resonators," IEEE Microw. Wireless Compon. Lett., vol. 21, no. 4, Apr. 2011, pp. 203-205. https://doi.org/10.1109/LMWC.2011.2106153
  3. S.C. Lin, "Microstrip Dual/Quad-Band Filters with Coupled Lines and Quasi-Lumped Impedance Inverters Based on Parallel-Path Transmission," IEEE Trans. Microw. Theory Techn., vol. 59, no. 8, Aug. 2011, pp. 1937-1946. https://doi.org/10.1109/TMTT.2011.2142191
  4. H. Liu et al., "Tri-Band Microstrip Bandpass Filter Using Dual- Mode Stepped-Impedance Resonator," ETRI J., vol. 35, no. 2, Apr. 2013, pp. 344-347. https://doi.org/10.4218/etrij.13.0212.0319
  5. S. Zhang and L. Zhu, "Compact and High-Selectivity Microstrip Bandpass Filters Using Triple-/Quad-Mode Stub-Loaded Resonators," IEEE Microw. Wireless Compon. Lett., vol. 21, no. 10, Oct. 2011, pp. 522-524. https://doi.org/10.1109/LMWC.2011.2166252
  6. X. Guan et al., "A Novel Dual-Mode Bandpass Filter Based on a Defected Waveguide Resonator," ETRI J., vol. 33, no. 6, Dec. 2011, pp. 953-956. https://doi.org/10.4218/etrij.11.0211.0034
  7. J.S. Hong and M.J. Lancaster, "Coupled Resonator Circuits," Chap. 8. in Microstrip Filters for RF/Microwave Applications, New York: Wiley, 2001.

피인용 문헌

  1. Design of Switchable and Reconfigurable Semi-lumped Wideband Bandpass Filter vol.39, pp.5, 2017, https://doi.org/10.4218/etrij.17.0117.0234
  2. A compact quad-band bandpass filter with mixed electric and magnetic coupling vol.11, pp.5, 2014, https://doi.org/10.1017/s1759078719000357