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有源相控阵雷达的发射具有分布式的特性,其发射系统功率孔径积的直接测量一直是工程中的难题.首先,介绍了一种雷达功率孔径积的测试原理、测试方法;其次,根据工程实际提出了直接法和比较法两种测试方法,并对两种方法的测试结果进行了比对;然后,给出了测试时波束法线对齐的逼近法流程、测试误差分析等;最后,通过对某型相控阵雷达的实际工程应用,进一步验证了测试方法的有效性.“,”Because of the distributed transmitting features,it is difficult to test the radiation power-aperture of active phased array ra dar directly.Firstly,a new test principle and method of power-aperture product is provided.Secondly,according to the engineering reality,the direct test method and comparison test method are both provided,and the test results are compared.Thirdly,the alignment algorithm of the normal direction of wave-beam and the analysis of testing error are provided.Finally,the correctness and validity of the algorithm is indicated by the engineering application of testing power-aperture product of one active phased array radar.