(under subclass 770) Subject matter wherein at least one of the apertures is combined with a wave guide (or resonant cavity) for energizing the aperture or conducting energy therefrom.
(1) Note. The wave guide must perform the coupling function. Plural slot antennas wherein the apertures are directly fed by a transmission line connected to the opposite edges of the slot, and having a resonant cavity in back of the aperture as a reflecting means for confining the energy in one direction but not performing the coupling function, are not classified in this subclass but in subclass 770, above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
762, for moving wave guide type antennas with means for moving, scanning, sweeping or orienting.
772+, for wave guide type antennas.
853+, for plural antennas with a coupling network.
844, for plural antennas in general spaced a fractional or full wave length apart.
