On the maximum directivity of surface wave along the impedance flange of finite array of plane waveguides

In this paper the maximum reachable value of directivity of the surface wave along the impedance flange of antenna array are discussed. As shown by numerical experiment usage, single-directional surface wave can be achieved in very rare array characteristics combination. However, high surface wave directivity (over the 90% of surface wave power) can be achieved in many cases. It makes possible to construct surface wave antennas without any emerging parts over the surface.