Accession Number : AD0716020

Title :   Tropospheric Forward Scatter Over a Seawater Path at X-Band, Employing Directional and Omnidirectional Antennas,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Raudenbush,John E.

Report Date : 30 NOV 1970

Pagination or Media Count : 26

Abstract : In order to determine the feasibility of employing a troposcatter system at X-band frequencies for naval task-force communications, an experimental circuit was installed over a 72.8-naut-mi, predominately sea water path. Transmission-loss data were collected over a period of one year on this circuit, employing a high-gain parabolic transmitting antenna, and an omnidirectional receiving antenna. Other antenna combinations were also tried for relatively short periods of time. The results of the experiment indicated that with the terminal equipment employed on this experimental link, the percentage of time that satisfactory communication could be obtained would not be adequate for naval task-force requirements, in view of the desired goal of ranges out to 300 naut mi. However, at lesser ranges and with high-gain antennas at each terminal, successful troposcatter circuits at X-band are a definite possibility. The transmission-loss data obtained from the conduct of this experiment should be useful for extrapolation to estimate the performance of systems employing improved terminal equipment and more sophisticated transmission techniques. (Author)

Descriptors :   (*RADIO TRANSMISSION, SCATTERING), TROPOSPHERE, MICROWAVE COMMUNICATIONS, X BAND, ATTENUATION, OCEAN WAVES

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE