Contents I Introduction
Land mobile terrestrial broadcast or telecommunication systems developed during the last decade at S-band generally considered Single Input Multiple Outputs (SIMO), Multiple Inputs Single Output (MISO) or even Multiple Inputs Multiple Outputs (MIMO) techniques to improve the capacity of the transmission channels. Among these techniques, polarization and space diversity have particularly been investigated. The use of such diversity techniques for Land Mobile Satellite (LMS) systems has also been recently envisaged [1]. In particular, the French space agency has recently carried out several experiments dedicated to the measurement of MISO (dual circular polarization diversity, satellite diversity), SIMO (spatial diversity at receive side) and MIMO (dual circular polarization diversity) antennas configurations:
