In order to solve the problem of pointing deviation of phased arrays caused by the quantization phase of digital phase shifters, this paper proposed zero mean phase error method and investigated how the method affects the arrays beam-steering accuracy, and an effective formula was developed.

The condition of clock asynchronization that causes maximum effect on beam-steering is given,and a calculation formula of beam pattern is obtained.

This paper analyzes the effect of amplitude phase errors on sidelobe level and beam direction in digital beam forming system.