.~ With spaced or external radio wave refractor (e.g., lens) {2}
754
.~.~ With scanning, sweeping, or orienting
DEFINITION
Classification: 343/754
(under subclass 753) Subject matter wherein structure is included which permits or effects scanning, sweeping, or orienting of the antenna beam.
(1) Note. See (4) Note under subclass 757 for the significance of the terms "scanning", "sweeping" or "orienting".
(2) Note. Usually the scanning, sweeping or orienting is obtained by relative motion between the active antenna and the refractor, or by controlling the coupling of the active
antennas associated with the refractor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5+, and 100+, for reflected and/or otherwise returned wave systems and directive radiant energy systems, respectively, which may involve a spaced external wave refractor and means for scanning, sweeping or orienting.
757, for antennas having means for moving the antennas for scanning, sweeping or orienting. 768, for slot type antennas with periodic control of the slot or coupling which may involve scanning, sweeping or orienting.
777, for plural wave guide type antennas with control of the individual antenna.
780, for pillbox type antennas which may be adapted for scanning, sweeping or orienting.
839, for antennas wherein the reflector and active antenna are relatively movable.
854, for antennas in general with an adjustable coupling network.
