As the work frequency of the shipboard double channel radar increase, the condition of far field angle calibration is more and more difficult to satisfy. Through the autotrack system analysis of the double channel radar, this paper states the reason of causing cross coupling. On the basis, this paper states the influence of near field effect to phase and angle calibration. This paper provides 4 methods to solve the near field effect, through realistic engineering testing and contrast, the method of using near array antenna can appropriately solve the angle calibration problem of radar antenna on near field effect condition. At last, the X band antenna has been practical tested, the method of using near array antenna has been proved easy to operate and the data is stable which has been verified in satellite monitoring and control tasks.