(under subclass 772) Subject matter wherein the wave guide has its opposing surfaces formed as conical or flared surfaces of revolution on a common axis, the spacing between the surfaces increasing from the apices towards the peripheries, the coupling to the source or collector extending from the apices, as by a coaxial line or wave guide, through one of the surfaces of revolution, the surfaces guiding the wave energy between the apices and the peripheries.
(1) Note. The patents of this subclass resemble somewhat in structure the sleeve and ground plane antennas of subclasses 790+ and 829+. However, in this subclass (773) the opposing surfaces act merely as a wave guide; while in the other two subclasses this wave guide action is not present, but one or both of the surfaces acts directly as a radiator or collector of radio wave energy.
SEE OR SEARCH THIS CLASS, SUBCLASS:
786, for wave guide type antennas with horns.
790+, for sleeve type antennas. See also (1) Note, above.
807, for tapered balanced doublet antennas. 809, for fractional, multiple or full wave type antennas including grounding structures. See also (1) Note, above.
