1. A calibration system for an RF signal transceiving system including an antenna array comprising an antenna array including a plurality of antennas for transmitting a first plurality of signals including individually identifiable signals and for receiving a second plurality of signals from a transponder signal, signal processing means for generating said first plurality of signals and for processing said second plurality of signals, means for applying said first plurality of signals to said antenna array, transponder means for receiving said first plurality of signals and in response thereto retransmitting said transponder signal to said antenna array, means for applying said second plurality of signals received from said antenna array to said signal processing means, said signal processing means comparing said second plurality of signals to determine receive calibration vectors, said signal processing means determining transmit calibration vectors by comparing said first plurality of signals and said second plurality of signals.