线极化卫星异地校相方法研究

船载卫通站使用线极化卫星转发器进行通信时,通过极化面调整来适应地理位置改变而引起的极化角变化,以确保极化隔离度满足指标要求,而极化面调整将引起跟踪接收机相位发生变化,使天线跟踪性能下降。为克服海上动态条件下无法对跟踪接收机校相带来的困难,提出了一种静态条件下对接收机进行异地校相的方法,并将试验结果应用于海上实际跟踪,初步验证了该方法的可行性,可为后续线极化卫星在船载卫通站的应用提供参考。

Study on Phase Calibration Method for Linearly Polarized Satellite in Another Place

When communicating through linearly polarized satellite transponder, the shipborne earth station usually adjusts the antenna polarization plane to adapt to the variety of polarization angle caused by position change to assure that the cross polarization isolation satisfies the specification requirement. But the antenna polarization plane adjustment would cause the tracking receiver phase to change and lead to the decline of antenna tracking performance. In order to solve the problem of phase calibration in dynamic state on the sea, a substitute method of phase calibration in another place in stable state is put forward. It has been proved feasible after the experimental results based on the method were applied to the tracking receiver on the sea. It provides a reference for shipborne earth station which applies linearly polarized satellite to communication.