随着船舶的航行,船载卫通站需根据极化角的变化对接收机相位进行补偿。如果补偿方式不合理,会导致和差通道相位失配,引起天线在海上动态环境下跟踪性能变差。针对船载卫通站采用接收机相位同向补偿方法,使用左旋差信号时工作正常,而使用右旋差信号跟踪线极化星时接收机相位随着船舶航行出现偏移,导致天线失锁的问题,结合以往工程经验,分析了船载卫通站接收机相位补偿原理进行排查定位,提出了相应的解决方案,并完成了接收机、天线控制单元和伺服监控软件的修改完善、测试验证。试验结果表明:问题定位准确,解决方案正确有效、可行性强,可为类似问题的解决提供参考。

When the ship is sailing in the ocean, it is necessary for the shipboard satellite communication station to compensate receiver phase according to the variation of the polarization angle. If the composition method is inappropriate, it will cause the phase mismatch between the sum channel and the difference channel, which leads to a poor tracking performance under dynamic environment at sea. A shipboard satellite station adopts receiver phase-in-direction compensation method. Using the left-handed difference signal, it can work properly. But when using the right-handed difference signal to track a linear polarization satellite, receiver phase is changing when the ship is sailing in the ocean, which makes it hard to track satellite. This problem is deeply analyzed by introducing the receiver phase compensation principle, locating and detecting the problem basing on past experience in engineering, coming up with the corresponding solution and completing receiver, antenna and servo monitor software modification and tests. The experimental results illustrate that the problem is located accurately, the solution is correct, effective and feasible which can help to solve similar problems.

TP273