a self contained system 20 is employed a local sense antenna 17 is used to sample outputs of the transmit antenna elements which are fed back to the processor 18 which computes the corrective weighting coefficients the self contained system 20 constitutes a closed loop system 20 with no human intervention in that the error measurements directly control the corrections such a closed loop system 20 may also be implemented with a remote earth station as well as the onboard local sense antenna 17 similarly a local signal source is used in the closed loop system 20 to provide a calibration signal that is processed through the receive antenna 22 to the processor 18 which computes the corrective weighting coefficients for the receive path fig2 shows details of the transmit and receive phased array antennas 21 22 and illustrates the operation of phased array antenna management systems 20 of the present invention the transmit and receive phased array antennas 21 22 are comprised of a power splitter 31 having an input coupled to receive signals by way of the feeder antenna 23 and whose outputs are coupled through a plurality of element chains 30 of the transmit phased array antenna 21 to the respective antenna elements 28 thereof each chain 30 is comprised of a commutator switch 33 amplitude adjustment network 34 phase adjustment network 35 an amplifier 36 and a bandpass filter 37 that are coupled to the respective antenna elements 28 a probe carrier source 32 such as an oscillator 32 for example is coupled to each switch.