Modem supporting digital pre-distortion, antenna module, and method for operating same

An antenna module comprising:

• antennas;
• RF chains connected to the antennas;
• a splitter/combiner connected to the RF chains;
• a mixer configured to upconvert an IF signal input to the antenna module into a transmission RF signal and output the upconverted signal to the splitter/combiner and/or to downconvert a reception RF signal which is a combination of signals from the RF chains provided from the splitter/combiner;
• a plurality of first couplers connected between at least the RF chains and the antennas, each of the plurality of first couplers being disposed between at least the antennas and the splitter/combiner;
• a second coupler configured for measuring a magnitude corresponding to a transmission RF signal before split by the splitter/combiner and/or the reception RF signal combined by the splitter/combiner, the reception RF signal downconverted by the mixer and provided to an intermediate frequency IC connected to the antenna module, and the transmission RF signal generated at least by upconversion of the IF signal provided from the intermediate frequency IC by the mixer;
• and
• a power detector configured to provide a plurality of magnitudes of a plurality of signals from the plurality of first couplers and a magnitude of a signal from the second coupler.