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A high selectivity quad-band bandpass filter based on hybrid-coupled microstrip/slotline quad-mode resonator

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Listed:
  • Hui Chen
  • Hong-Fei Zhao
  • Ke-Song Chen
  • Y.-H. Wu
  • Pu Tang
  • Hong-Sheng Zhong

Abstract

A sharp-rejection and high-isolation quad-band bandpass filter with ellipse response using hybrid microstrip/slotline quad-mode resonator is proposed in this paper. The presented composite quad-mode resonator consists of a narrow L-shaped slot in the ground plane and a broadside microstrip L-shaped structure loaded by the two orthogonal narrow-stripline stubs. The dual-metal-plane resonator on a single substrate is employed to obtain a quad-frequency response. Based on this quad-mode resonator, a filter with four passbands centering at 3.86, 6.93, 10.13, and 12.58 GHz is designed, fabricated, and measured. Simulated results from the full-wave electromagnetic software and measured results show a good agreement. The measured inter-band isolations among the quad-frequency passbands with multi-transmission zeros are greater than 22 dB.

Suggested Citation

  • Hui Chen & Hong-Fei Zhao & Ke-Song Chen & Y.-H. Wu & Pu Tang & Hong-Sheng Zhong, 2013. "A high selectivity quad-band bandpass filter based on hybrid-coupled microstrip/slotline quad-mode resonator," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 27(15), pages 1902-1909, October.
    • Handle: RePEc:taf:tewaxx:v:27:y:2013:i:15:p:1902-1909
    DOI: 10.1080/09205071.2013.828574
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