Antenna array system with directional coupler for calibration

An antenna array system includes a receiver having a plurality of receive chains adapted to receive incoming signals from corresponding receiver antennas. A respective directional coupler is positioned proximate to each of the plurality of receive chains. The plurality of receive chains are adapted to receive respective pilot signals through respective directional couplers, the respective pilot signals being transmitted simultaneously. The controller has a processor and tangible non-transitory memory on which is recorded instructions for the calibration method. One of the plurality of receive chains is selected as a reference channel. The controller is adapted to perform calibration on the plurality of receive chains based on the respective pilot signals, including obtaining respective chain phase values and respective gain factors. Calibration is performed without mechanically turning off or physically turning off the corresponding receiver antenna. 一种天线阵列系统包括具有多个接收链的接收器，该多个接收链适于从对应的接收器天线接收传入信号。相应的定向耦合器定位在多个