Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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Compact Low-Pass Filter with Sharp Skirt Characteristics and Broad Stopband

  • Li, Rui (Department of Radio Sciences and Engineering, Korea Maritime University) ;
  • Kim, Dong-Il (Department of Radio Sciences and Engineering, Korea Maritime University) ;
  • Choi, Chang-Mook (Department of Radio Sciences and Engineering, Korea Maritime University)
  • Published : 2006.09.30
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Abstract

A new compact microstrip low-pass filter and its equivalent-circuit model are developed. The philosophy of the structure behind this novel microstrip low-pass filter is simple as it is composed of a pair of symmetrical parallel coupled-line and an open-stub. With this configuration, a finite attenuation pole near the stopband cutoff frequency is available and adjustable by simply tuning the circuit parameters. Furthermore, the rejection bandwidth of this type of low-pass filter can be extended. In order to validate the feasibility of the proposed design method, a low-pass filter based on a microstrip structure is designed, fabricated, and measured. Experimental results agree very well with the simulation and analytical results.

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References

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