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Design of a novel wideband quasi-elliptic filter based on SIR and asymmetric coupled lines

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  • L.X. Zhou
  • W. Hu
  • Y.Z. Yin
  • X. Yang

Abstract

Stepped impedance resonator (SIR) and asymmetric coupled-line sections are used to design a novel fifth-order wideband bandpass filter in this paper. Even- and odd-mode technique is introduced to design and analyze the filter. The proposed filter possesses the characteristics of spurious-free response up to the third harmonic frequency with two transmission zeros on each side of the passband, thus resulting in the improved selectivity. One prototype with 3-dB fractional bandwidth of 53% (2.2–3.79 GHz) is fabricated for demonstration, and good agreement can be observed between simulated and measured results.

Suggested Citation

  • L.X. Zhou & W. Hu & Y.Z. Yin & X. Yang, 2014. "Design of a novel wideband quasi-elliptic filter based on SIR and asymmetric coupled lines," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 28(10), pages 1194-1202, July.
    • Handle: RePEc:taf:tewaxx:v:28:y:2014:i:10:p:1194-1202
    DOI: 10.1080/09205071.2014.910143
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