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Double-folded substrate integrated waveguide band-pass filter with transmission zeros in LTCC

Author

Listed:
  • L.-J. Xu
  • J.P. Wang
  • Y.-X. Guo
  • W. Wu

Abstract

A miniaturized substrate integrated waveguide (SIW) band-pass filter with two transmission zeros is proposed in low-temperature co-fired ceramic (LTCC) technology. The miniaturization of the filter is achieved by vertically stacking three double-folded SIW resonators. To strengthen the coupling between the feeding structure and the resonators, a new meandered microstrip feeding line is introduced. In addition, to realize better out-of-band rejection performance, two short-circuited lines are adopted in the filter design to achieve two transmission zeros outside the passband. To verify the design concept, an X-band LTCC band-pass filter was designed, fabricated, and measured. Both simulation and measurement results indicate that the proposed filter has good frequency response, high selectivity, and a size reduction of about 87% in comparison with conventional planar direct-coupled waveguide filter.

Suggested Citation

  • L.-J. Xu & J.P. Wang & Y.-X. Guo & W. Wu, 2013. "Double-folded substrate integrated waveguide band-pass filter with transmission zeros in LTCC," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 27(1), pages 96-103, January.
    • Handle: RePEc:taf:tewaxx:v:27:y:2013:i:1:p:96-103
    DOI: 10.1080/09205071.2013.739540
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