无源定位技术有着广阔的应用前景 ,本文在现有单站无源定位方法的基础上 ,介绍了相位变化率定位法。该方法利用观测平台上两个相互正交的相位干涉仪接收目标辐射电磁波的相位获取目标的方向信息 ,利用对应的相位变化率获取目标的径向距离信息 ,从而实现对目标的实时高精度定位。文中还给出了观测平台飞行姿态变化情况下的定位表达式。仿真结果表明 ,该方法是一种发展前途较好的单站无源定位方法 Passive location technology has broad application prospects. Based on the existing single station passive location method, this paper introduces the phase change rate location method. In this method, the phase of the target radiated electromagnetic wave is received by two mutually orthogonal phase interferometers on the observation platform to obtain the target direction information, and the radial distance information of the target is obtained by using the corresponding phase change rate to achieve the real-time high-precision positioning of the target . The paper also gives the positioning expression of the observation platform under the changing flight attitude. Simulation results show that this method is a promising single-station passive location method