(under subclass 772) Subject matter wherein the wave guide contains a mass (usually dielectric) which freely passes radio waves, and which is shaped or positioned to delay or accelerate waves passing therethrough an amount which varies over the wave front for such purposes as focusing, changing direction, or changing the wave front as from circular to planar.
SEE OR SEARCH THIS CLASS, SUBCLASS:
753+, for antennas having spaced radio wave lenses or diffractors associated therewith.
756, for antennas having polarization filters associated therewith.
785, for dielectric wave guide type antennas.
909+, for refracting means and radiant energy filters (e.g., lenses and polarizers), per se.
SEE OR SEARCH CLASS 333, Wave Transmission Lines and Networks, particularly
239+, and 248+, for wave guides having lenses or refracting means.
