Ambiguity of rotating-element electric-field vector method and elimination method

Ambiguity of rotating-element electric-field vector (REV) method for calibration of phased array antenna and the elimination method were studied. Two sets of solutions exist for calibration of phased array antenna using the REV method. And one of sets is pseudo solution. Ambiguity and physical interpretation of solutions were studied by the theoretical analysis. In order to eliminate the ambiguity, a novel method was proposed by the variable substitution based on several tests with different phase distributions. Theoretical analysis and simulated results show that the proposed method can eliminate the ambiguity of the REV method effectively. Furthermore, this method has advantages of high operability and low requirement for test system.