Ka频段大口径测控天线无人机校相方法设计与验证

Design and Test Verification of Phase Calibration Mode of Ka-Band Large Aperture TT&C Antenna Based on Unmanned Aerial Vehicle

面向Ka频段航天测控设备天线标校工程应用需求,分析了大口径测控天线相位校准方法原理,论证设计了轻量化、模块化的组合式测控应答机无人机装载模式,提出了基于无人机的S频段天线自跟踪叠加偏置进行Ka频段天线快速校相的方法,并进行了跟踪精度分析。计算了在不同地面测控天线口径下进行相位标校的链路余量,规划了无人机飞行航路和试验步骤,并进行了Ka频段天线快速校相、电轴一致性测试试验,每次相位标校得出的交叉耦合和灵敏度系数指标均满足天线对无人机信标的闭环自跟踪要求。结果表明,基于无人机平台的大口径测控天线相位校准方法能够为Ka频段测控设备标校提供一种新的手段,具有良好的工程应用前景。

For the requirements of calibration and test verification of Ka-band telemetry,track and command(TT&C)equipment,a phase calibration method principle for large aperture TT&C antenna is analyzed,and a lightweight,modular combined TT&C transponder mode is designed in this paper.On the basis of unmanned aerial vehicle(UAV),a method for fast phase calibration of Ka-band antenna based on S-band antenna self-tracking overlay bias is proposed,and also the tracking accuracy is analyzed.The link margin of phase calibration under different ground TT&C antenna diameters is calculated and the UAV flight route is planned.On the basis above,the Ka-band antenna phase calibration and electrical axis conformance tests are carried out.The results show that the phase calibration method by UAV can provide a new technique method for phase calibration of Ka-band TT&C equipment,and has good prospect in engineering applications.