(under subclass 700) Subject matter wherein a current path of appreciable electrical length is arranged as a substantially closed active loop having an appreciable electrical dimension between all opposing points on the loop together with structure or proportions to maintain a desired current distribution around the loop.
(1) Note. The desired current distribution usually involves a particular position of the standing wave pattern along the current path, or the instantaneous current effectively flowing in one direction along the current path. The purpose of this is usually to maintain an omnidirectional pattern in one plane.
SEE OR SEARCH THIS CLASS, SUBCLASS:
726, and 728, for plural separate diverse type antennas including a loop type antenna.
732, and 733+, for circular loop and rhombic traveling wave antennas respectively.
748, for loop type antennas with variable reactance for tuning.
764, for loop type antennas with means for moving the loop for scanning, sweeping or orienting.
788, for loop type antennas including magnetic material.
842, for loop type antennas with electrical shields.
855, for plural loop type antennas with a coupling network or impedance in the leadin.
