Patent ID: 7103385

Claim:
A moving body satellite communication apparatus comprising: an antenna mounted on a moving body and including an anisotropic radome; 90° phase combiners connected to the antenna and constituting control systems of at least two channels for each of transmission and reception; a variable phase shifter inserted in each of the control systems of the two channels; a first variable attenuator connected in series to the variable phase shifter; and an antenna control circuit for performing attitude control of the antenna according to a relative positional relation between the moving body and a satellite, characterized in that the antenna control circuit includes: a first correction table storing radome correction data for frequencies and polarization angles of the antenna, the variable phase shifter and the first variable attenuator are controlled by referring to the first correction table, a second variable attenuator is inserted at an input side of the transmission side 90° phase combiner, and a second correction table having correction values to influence by control of the first variable attenuator upon effective isotropic radiated power (EIRP), wherein the second variable attenuator is controlled by referring to the second correction table.