(under subclass 772) Subject matter wherein the wave guide includes two parallel plates which are closed along a portion of their perimeter by a reflector, the spacing between the plates being small compared to their surface dimensions, the plates being electrically open to free space over a relatively large portion of their perimeter.
SEE OR SEARCH THIS CLASS, SUBCLASS:
781+, for wave guide type antennas with a reflector or director.
834+, and Search Notes thereunder, for antennas with parasitic reflectors in general.