Evaluation of inverted microstrip gap waveguide bandpass filters for Ka-band

Nelson Castro, Francisco Pizarro, Luis Fernando Herrán-Ontanón, Eva Rajo-Iglesias

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


This article presents the implementation of three inverted microstrip gap-waveguide (IM-GWG) bandpass filters for the Ka-band, at a central frequency of 28 GHz. This technology is a good candidate for the future communication systems operating in the millimeter-wave frequency bands due to the low loss characteristic and the easy manufacturing due to the increased size for these frequency bands. Three different topologies will be analyzed and their sensitivity to the position with respect to the pins of the bed of nails will be studied. Measurements confirm the good performance of the technology in terms of transmission and reflection coefficients over the whole assessed band.

Original languageEnglish
Article number153677
JournalAEU - International Journal of Electronics and Communications
StatePublished - May 2021


  • Bandpass filter
  • Gap waveguide
  • Inverted microstrip
  • Ka-band


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