Experimental characterisation of planar groove gap waveguide and cavity

Broadband mm‐wave propagation characterization of planar groove gap waveguide

“…In this article, we present new results on the broadband propagation characteristics of the medium in a manner similar to what was presented for machined GGW previously . This work extends on our previous analyses by presenting a broadband back‐to‐back experimental comparison between PGGWG and SIW, highlighting the slow‐wave property of PGGWG.…”

“…Previous analyses of PGGWG's properties have been based on resonant structures, where cavity Q ‐factor is used as a metric . In this article, we present new results on the broadband propagation characteristics of the medium in a manner similar to what was presented for machined GGW previously .…”

“…PGGWG is realized within a parallel plate waveguide by using blind vias and catch pads to create an electromagnetic bandgap (EBG) medium on either side of a groove (Figure ). The waveguide sidewall is replaced by an artificial magnetic conductor (AMC).…”

“…The groove within the rows of the EBG vias creates a propagation channel similar to that in a rectangular waveguide, leading to transmission characteristics to which the theoretical analysis of GGWG may be applied. The TE 10 E ‐fields can be observed within the groove in Figure .…”

“…The TE 10 E ‐fields can be observed within the groove in Figure . The groove width w is chosen to ensure that the fundamental TE 10 mode, similar to that obtained in SIW, propagates within the stopband of the parallel plate modes . Figure further shows that the field is contained within the inner two rows of EBG cells.…”