(under subclass 236) Subject matter wherein the long line carries a travelling wave which is lightly coupled to a series of leakage apertures to create a concentrated, uniform, radiation field in the immediate vicinity of the aperture.
(1) Note. Many of the patents in this subclass are directed towards radiating energy from a coaxial cable in a building, tunnel, or mine and/or for vehicle communication.
SEE OR SEARCH CLASS
343, Communications: Radio Wave Antennas,
700+, for the structural details of the radiating aperture
used in conjunction with the long line, e.g., subclasses 767+ for slots.