A radio frequency (RF) transmitter may include: an interface configured to receive a signal representative of a detected presence by a proximity sensor configured to detect a presence in a vicinity of a plurality of antennas, a plurality of transmission paths, each transmission path is configured to provide an RF signal to a respective antenna of the plurality of antennas; a processing circuitry configured to: detect, responsive to a received signal representative of the detected presence, a change at a signal power reflected at each transmission path, and adjust transmit power of each antenna of at least one of the antennas based on a detected change at the respective transmission path.