Phased array calibration by orthogonal phase sequence

摘要

The phase of the antenna element signal is sequentially switched through four orthogonal phase states and power of each signal at the four state is measured. The phase and amplitude error of antenna element signal is obtained as a function of power at each of the four orthogonal phase states. The error signals are adjusted by a calibration processor such that anyone error signal converges with acceptable levels - Independent claims are also included for an array antenna system.