共轴双旋翼直升机卫星通信小型化终端设计与验证

直升机卫星通信面临旋翼转动时卫星通信信号受旋翼遮挡带来的不同程度衰减的问题。共轴双旋翼直升机对卫星通信信号的遮挡特性相比传统单旋翼要更复杂，且国内研究相对较少。首先分析了共轴双旋翼对卫星通信信号的遮挡特性以及抗双旋翼遮挡卫星通信的关键技术，在此基础上设计了一种小型化的适应双旋翼遮挡的卫星通信机载终端，并在双旋翼遮挡模拟环境下完成了试验验证。结果表明其传输性能满足指标要求，对后续工程应用具有设计指导意义。

Design and verification of a miniaturized terminal for coaxial twin rotor helicopter satellite communication

Helicopter satellite communication faces different levels of satellite communication signal attenuation by helicopter rotor blockage during flight.The blockage character of coaxial twin rotor is more complicated than single rotor and there is fewer research.Firstly,blockage character of coaxial twin rotor is analyzed,and the key techniques of anti- blockage of coaxial twin rotor satellite communication is discussed.On this basis,a miniaturized communication terminal which adapts coaxial twin rotor blockage is designed,and test under simulative coaxial twin rotor blockage environment is finished.The test result indicates that the communication performance of designed terminal meets the needs of specification,and this analysis can provide guidance for later design of coaxial twin rotor helicopter satellite communication system.