Groove gap waveguide as an alternative to rectangular waveguide for H‐plane components

A comparative study between groove gap waveguide (GGW) technology and classical H‐plane rectangular waveguide (RWG) technology is presented by evaluating their performance in the implementation of a narrow‐band filter at the V‐band. A filter with the same specifications has been manufactured and measured for each technology. Measured responses are compared and a re‐assembling robustness test is carried out. The GGW filter presents a better response and remains completely invariant to the re‐assembling process, which is shown to affect notably the RWG filter response. Remarkable low insertion loss of only 1.5 dB (cavities equivalent quality factor higher than 800) is obtained for the GGW filter.