通过分析天线内监测的原理框架图，结合SAR卫星的自身设备系统提出了SAR天线监测的数学模型，分析耦合和传输对监测带来的影响。根据监测网络编码正交性的要求给出了适用于该监测网络的相位码，提出了受T/R组件移相精度的影响而相位码码长不足的问题，给出了分块和迭代两种解决方法。最后，用计算仿真实验说明了相位码的有效性和监测模型的可行性。

With analysis the principle frame diagram of monitoring antenna, a monitoring model of SAR antenna is proposed and the effects on monitoring caused by coupling and transmission are analyzed. Also, the suitable phase code for this monitoring network is presented. Meanwhile, the problem of the code length insufficient caused by T/R component phase shift accuracy is analyzed, and present two methods of dividing block and iteration are presented. Simulation using MATLAB software is done to illustrate effectiveness of phase code and the feasibility of monitoring model.

TN821.8