CAJ | 학술논문

对中继卫星的捕获跟踪是建立星间数据链路首要前提,星载自跟踪系统有着广泛的应用前景. 针对Ka频段波束窄、星载设备小型化要求高等特点,提出了星载自跟踪系统设计方案. 方案采用单通道单脉冲方式,利用TE21模馈源技术从天线获取自跟踪信号,通过微波前端模块将信号调制、合并为单通道,然后在捕获跟踪接收机中提取误差角度,实现天线角度的精确跟踪. 经过链路分析,证明系统设计有效可行. 根据方案研制出原理样机并进行了试验验证,跟踪精度在X、Y方向优于±0. 05°,满足星间链路跟踪精度要求.
대중계위성적포획근종시건립성간수거련로수요전제,성재자근종계통유착엄범적응용전경. 침대Ka빈단파속착、성재설비소형화요구고등특점,제출료성재자근종계통설계방안. 방안채용단통도단맥충방식,이용TE21모궤원기술종천선획취자근종신호,통과미파전단모괴장신호조제、합병위단통도,연후재포획근종접수궤중제취오차각도,실현천선각도적정학근종. 경과련로분석,증명계통설계유효가행. 근거방안연제출원리양궤병진행료시험험증,근종정도재X、Y방향우우±0. 05°,만족성간련로근종정도요구.
Capturing and tracking for TDRS( Tracking and Data Relay Satellite) is the primary precondition of establishing the data links between satellites. There are more requirements for the automatic tracking system. In view of the narrow beam in Ka-band and the strict requirement of the pint-sized equipment by satellites,an autotracking system design for satellites is proposed with single-channel monopulse method. In the design,autotracking signals can be obtained by the TE21-mode feed of antenna. The signals are modulated and combined by the microwave front module. Then,error angle can be extracted in the receiver to achieve accurate tracking of the antenna. Link analysis proves that the system design is feasible. The sys-tem prototype is developed and tested. The tracking accuracy in X and Y direction is better than ±0. 05°, which meets the requirement of inter-satellite link.