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Journal of Shanghai University（Natural Science Edition） ›› 2008, Vol. 14 ›› Issue (6): 557-559 .

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New Compact Dual Band Bandpass Filter Using Stepped Impedance Resonators

XU He-ming, XIAO Zhong-yin, HU Hong-hong   

  1. (School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China)
  • Received:2007-07-10 Revised:1900-01-01 Online:2008-12-21 Published:2008-12-21
  • Contact: XIAO Zhong-yin

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Abstract:

A new dualband bandpass filter for 2.4/5.2 GHz WLAN systems using two stepped impedance resonators is presented. With a properly coupled structure, this filter appears very compact and easy to fabricate. Measured results show that this filter has very low insertion loss of 0.3 dB at 2.4 GHz and 0.7 dB at 5.2 GHz, and broad fractional bandwidths in both passbands, that is, 30% and 17%, respectively. Measured results are in good agreement with simulation.

Key words:
compact, bandpass filter (BPF), stepped impedance resonator (SIR), dual band

CLC Number: