Accession Number : AD0654989

Title :   PROPAGATION AT 5 GHZ IN EUROPE - A COMPARISON OF PREDICTIONS AND MEASUREMENTS FOR VARIOUS TYPES OF PATHS.

Descriptive Note : Technical rept.,

Corporate Author : INSTITUTES FOR ENVIRONMENTAL RESEARCH BOULDER COLO

Personal Author(s) : Peterson,C. F. ; Farrow,J. E. ; Capps,F. M. ; Samson,C. A.

Report Date : JUL 1966

Pagination or Media Count : 133

Abstract : During the fall of 1964 and the summer of 1965, received signal levels were measured over several military communication links in Europe operating in the band between 4.4 and 5 GHz. The propagation paths involved were of three types, namely, line-of-sight, mountain-obstacle diffraction, and tropospheric scatter. These measurements were made in the course of the development and the refinement of a system test plan. Pertinent system parameters such as line loss, antenna gain and transmitter power were obtained as a by-product of the test plan, and were utilized in the conversion of the received signal levels to basic transmission loss values. Prior to the measurements, calculations were made of the transmission loss distributions to be expected over the various paths. These calculated values are compared with those derived from the measurements. A prolonged space wave fadeout occurred over one of the mountain-obstacle diffraction paths. This fadeout is analyzed in detail and a correlation with meteorological conditions along the path is illustrated. (Author)

Descriptors :   (*RADIO TRANSMISSION, WESTERN EUROPE), SUPERHIGH FREQUENCY, MICROWAVES, RADIO WAVES, MULTIPATH TRANSMISSION, DIFFRACTION

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE