Patent ID: 7825852

Claim:
An apparatus for simultaneous calibration and communication of active arrays of a satellite comprising: a base transmitter comprising a first antenna for simultaneously transmitting a calibration carrier having a first frequency and a communication carrier having a different second frequency to a satellite receiver; the satellite receiver comprising a second antenna comprising a first active array for simultaneously receiving the calibration carrier and the communication carrier transmitted from the base transmitter and for simultaneously transmitting the calibration carrier and the communication carrier to a satellite transmitter; the satellite transmitter comprising a third antenna comprising a second active array for simultaneously receiving the calibration carrier and the communication carrier transmitted from the satellite receiver and for simultaneously transmitting the calibration carrier and the communication carrier to a base receiver; the base receiver comprising a fourth antenna for simultaneously receiving the calibration carrier and the communication carrier transmitted from the satellite transmitter; and at least one computer for calibrating the first and the second active arrays based on data received from the calibration carrier, for determining a correction factor based on the differences in frequency of the first frequency and the second frequency, and for calibrating the communication carrier by applying the correction factor to data received from the calibration carrier.