Ka-band propagation measurements and statistics for land mobile satellite applications

Ka-band (20/30 GHz) will he used extensively for fixed and mobile satellite communications In the next few years, especially for wide-band and multime dia applications, For this reason, a good knowledge of the propagation impa irments and adequate propagation models for that frequency range are needed . In this paper, cumulative distribution functions (CDF's) of the received signal variations due to shadowing/blockage events at Ka-band using the 18. 7-GHz beacon of the Italsat satellite for a number of representative enviro nment types are presented. Approximate availability levels for three shadow ing/blockage margins (5, 10, and 15 dB) are provided for three orientations of the road with respect to the satellite and for different environments: urban, suburban, and tree-shadowed, All measurements correspond to an eleva tion angle between 28 degrees and 36 degrees.