Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (1): 10-14.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Design of Triple-Band Filter Based on Assembled Multiband Resonator

Chen Fu-chang  Chu Qing-xin   

  1. School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2008-02-22 Revised:2008-03-31 Online:2009-01-25 Published:2009-01-25
  • Contact: 陈付昌（1982-），男，博士，主要从事射频电路研究． E-mail:fc．chen@mail．scut．edu．cn
  • About author:陈付昌（1982-），男，博士，主要从事射频电路研究．
  • Supported by:

    国家自然科学基金资助项目（U0635004）

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Abstract:

In order to obtain triple-band bandpass filters with independently-controlled center frequencies and bandwidths, this paper presents a novel design method of triple-band filters based on the assembled multiband resonator. In this method, first, a stepped impedance resonator and a half-wavelength resonator are both employed to construct an assembled muhiband resonator. Then, two kinds of triple-band filter configurations with cascaded and pseudo- interdigital formats are designed, both of which possess sufficient freedom to satisfy the requirements of bandwidth and center frequency. Finally, two filters operating at 2.45, 3.50 and 5.25 GHz are designed and fabricated. The measured results of the filters accord well with the simulated ones, meaning that the proposed design method is feasible.

Key words: triple-band filter, assembled muhiband resonator, bandpass filter, stepped impedance resonator, microstrip