Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Spurious Suppressed Substrate Integrated Waveguide Bandpass Filter Using Stepped-Impedance Resonator

  • Lee, Il-Woo (Korea Marine Equipment Research Institute) ;
  • Nam, Hee (Dept. of Wireless Communications Engineering, Kwangwoon University) ;
  • Yun, Tae-Soon (Dept. of Radio Mobile Communication Engineering, Honam University) ;
  • Lee, Jong-Chul (Dept. of Wireless Communications Engineering, Kwangwoon University)
  • Received : 2009.09.15
  • Published : 2010.03.31
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Abstract

A spurious suppressed bandpass filter is proposed and discussed using the stepped impedance resonator(SIR) on a substrate-integrated waveguide(SIW) structure with a double-layer substrate. The second resonance of the fundamental $TE_{10}$ mode can be controlled by adjusting the electrical length and impedance ratio of each SIR. The spurious suppressed SIW bandpass filter shows the measurement results of the insertion loss of 3.98 dB and return loss of less than 11.58 dB at the center frequency of 12 GHz. Also, the second spurious frequency is improved to about $1.5f_0$ compared with $1.33f_0$.

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References

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