毫米波段无线相位方向图的高质量测量一直是个难题，本文在单通道天线方向图测试系统接收机前加接一个简单的毫米波时分鉴相器和二只接收喇叭，利用差相法成功地测量了典型角锥喇叭的相位方向图，实测结果与理论计算结果相符很好。这种方法可应用于任何波段，尤其是一般测量方法难以实现的高频波段的天线相位方向图测量。 The high quality measurement of the millimeter wave band wireless phase pattern has always been a difficult problem. In this paper, a simple millimeter-wave time-phase detector and two receiving horns are added in front of the receiver of the single-channel antenna pattern test system, and the differential phase method is used to measure successfully The typical pyramid horn phase pattern, the measured results and theoretical calculations are in good agreement. This method can be applied to any band, especially the high frequency band antenna phase pattern measurement which is difficult to be achieved by the general measurement method.