关于极化角计算的研究

Research on Calculation of the Polarization Angle

针对动中通系统极化轴易受载体姿态扰动的影响,在天线视轴对准卫星后,根据车体的地理位置和天线方位转盘的姿态参数,推导出极化角的计算公式。在特定的路况下,利用该方法得到的极化角与高精度基准方法得到的极化角进行了仿真对比,仿真结果表明该方法是可行的。该方法为极化轴的稳定控制、系统实现"动中通"极化失配的要求提供了理论依据,并给出实现方案。

To solve the problem that the polarization axis in the SOTM （Satcom On The Move） system is affected easily by the carrier attitude disturbance, a new formula for polarization angle calculation is deduced based on the geographic position and attitude parameter of the antenna azimuth turntable after the antenna boresight axis has pointed to the satellite. Then the polarization angle obtained respectively with the new method and the high-precision reference method under special road conditions are compared by simulation. The simulation result shows that the new method is feasible. The method provides the theoretical basis for stability control of the polarization axis and polarization matching in mobile systems and gives the implementation scheme.