极化角对跟踪接收机相位影响分析

根据卫星通信中遇到的极化问题及其对移动地面站的影响,针对不同极化卫星间的差异,从电磁场理论中极化的定义和分类出发,给出不同极化电磁波电场信号表示方法,以某型移动卫通站天线馈源结构为例,介绍了不同状态下极化工作方式和线极化方式中线极化面调整的机理,然后结合单通道单脉冲跟踪接收机工作原理,对天线跟踪水平极化信标时线极化角与跟踪接收机相位间的关系进行了详细分析,为解决实际应用中遇到的跟踪接收机相位漂移问题提供了技术依据。

Analysis of the Influence of Polarization Angle on the Phase of Tracking Receivers

The influence of polarization on mobile satcom is analyzed.Based on the definition and categorization of polarizations in electromagnetic field theory,mathematical expressions of electromagnetic waves with different polarizations are presented.Taking the antenna feed of a mobile satcom earth station as an example,operation modes under different situations and different polarizations,theoretical mechanism for adjustment of the polarization plane in linear polarization mode is introduced.Detailed analysis of the relationship between polarization angle and the phase of receiver is given for tracking of a horizontal polarization beacon in the case of a single-channel monopulse tracking receiver.Technical insights are provided to resolve phase drift of tracking receivers in practical circumstances.