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

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.

Automated summary

This article presents the implementation of three inverted microstrip gap-waveguide bandpass filters for the Ka-band, showing low loss characteristics and easy manufacturing due to increased size for millimeter-wave frequency bands. Different topologies were analyzed and their sensitivity to the position relative to the pins of the bed of nails was studied. Measurements confirmed the good performance of the technology in terms of transmission and reflection coefficients across the evaluated band.