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对旋转矢量法用于相控阵天线校准时的多解问题及其消除方法进行了研究.采用旋转矢量法对相控阵天线进行校准时会得到两组解,其中一组是伪解.通过理论推导对旋转矢量法中解的二义性进行了分析,给出了两组解的物理意义;然后通过对求解量进行变换给出了一种基于多轮测试的旋转矢量法解的二义性消除方法;最后通过理论分析和数值仿真对该方法的有效性进行了验证.结果表明,通过设置多组不同的初始相位分布,进行多轮旋转矢量测试,可有效消除解的二义性,该方法具有可操作性强、对测试系统要求低等优点.
The problem of multi-solution when rotating vector method is applied to the calibration of phased array antenna and its elimination method are studied.When the phased array antenna is calibrated by using the rotation vector method, two sets of solutions are obtained, one of them is a pseudo-solution The theoretical derivation analyzes the ambiguity of the solution in the rotation vector method and gives the physical meaning of the two solutions. Then, a solution of the rotation vector method based on multiple rounds of tests is given. Finally, the effectiveness of this method is verified through theoretical analysis and numerical simulation. The results show that by setting multiple sets of initial phase distributions and performing multiple rotation vector tests, the ambiguity of solutions can be effectively eliminated, The method has the advantages of strong operability and low requirement on the test system.