Ka-band propagation research using ACTS

The congestion of the radio spectrum below about 18 GHz is causing a rush of interest in the 20/30-GHz band, Due to the shorter wavelength of these frequencies, the atmosphere, especially rain, greatly influences the transmission of signals between earth/space stations. The slant path effects in the Ka region of the radio spectrum are addressed and an experimental campaign for collection propagation data is described. This campaign uses the advanced communications technology satellite (ACTS) and consists of several measurement sites. A brief description of the spacecraft payload and the propagation terminals is given. The experiment sites are discussed. The expected outputs of the ACTS campaign are presented. Measured results and analysed data are reported.