Standing Wave Considerations in the Link Model of 60 GHz Directional Surface Wave Arrays

This paper proposes an improvement of the link model of 60 GHz directional surface wave antenna arrays. Since the transmit and receive arrays share the grounded substrate, the total coupling power is contained in both space and surface waves. The dominant TM₀ mode of the grounded substrate contributes to the surface wave coupling. In addition, it is shown that the finite extent of the substrate creates a TM₀ standing wave. This wave is responsible for oscillations in the power coupling between the arrays as a function of their separation.