Panel level calibration for front end modules in a phased array antenna

A phased array antenna, comprising:

• a plurality of antenna elements configured to operate in a transmit mode and a receive mode;
• a plurality of front end modules (FEMs) configured to operate corresponding antenna elements of the plurality of antenna elements to transmit and receive radio frequency (RF) signals;
• a digital beamformer (DBF) configured to translate between the RF signals and corresponding digital signals, the DBF coupled to the plurality of FEMs over at least one RF distribution network;
• a modem coupled with the DBF and configured to:
• supply the corresponding digital signals for the transmit mode;
• process the corresponding digital signals for the receive mode;
• initiate a calibration, in the transmit mode and in the receive mode, of the plurality of FEMs based on an aggregate power consumption of the plurality of FEMs;
• and
• write compensation values for the plurality of FEMs, for the transmit mode and the receive mode, to a non-volatile memory, the compensation values computed based on the calibration.