Accession Number : ADD015213

Title :   Mid Range UV Communications.

Descriptive Note : Patent, Filed 3 Mar 89, Patented 29 Oct 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Geller, Myer ; Evanoff, George A , Jr

Report Date : 29 Oct 1991

Pagination or Media Count : 9

Abstract : Mid-range communications are improved with a transmitter having an elongate omni-directionally radiating tube of UV energy that are focussed by a compound parabolic reflector to within a designated azimuth and/or elevation.The configuration of the reflector gives a broad beam directivity over a receiver target area to the exclusion of other bearings and elevations such that selected receiving stations can be designated between moving or unstable communication platforms, such as aircraft or ships. Because scattering occurs at angles larger than the direct beam, the requirement for accurate tracking mechanisms is further relaxed. Furthermore, these extra scattered photons increase the link distance. The need for very small divergence transmitters, like lasers, is eliminated permitting inexpensive, efficient UV lamps to be used with compound reflectors as transmitter sources.

Descriptors :   ACCURACY, AIRCRAFT, BEARINGS, COMMUNICATION AND RADIO SYSTEMS, EFFICIENCY, ENERGY, INTERMEDIATE RANGE(DISTANCE), LAMPS, LASERS, MOTION, PARABOLIC ANTENNAS, PHOTONS, PLATFORMS, RANGES(FACILITIES), REFLECTORS, SCATTERING, SOURCES, TRACKING, TRANSMITTERS, ULTRAVIOLET RADIATION

Subject Categories : Command, Control and Communications Systems
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE