步进跟踪技术在机载卫星通信天线中的应用研究

Application of step tracking technology in airborne satellite communication antennas

由于单脉冲跟踪天线在网络设计上较为复杂,特别是在使用中需要经常校相,而由此带来的不稳定因素,使得天线指向常出现偏差。利用步进跟踪方法,能够在程序引导过程中,依据伺服控制系统来不断调整星位、飞机经纬度天线指向,并与步进跟踪进行信号叠加,以确保天线与跟踪卫星的精确性。对于步进跟踪技术是基于时段控制的方式,由于跟踪进度不够,通常可以获得1/6半功率波束带宽精度。在机载卫星通信天线实际应用中,即便存在较大惯导漂移,步进跟踪方式天线仍能获得长时间的稳定跟踪效果,可见,对于步进跟踪方法在机载卫星通信天线中的应用具有可行性。

Because a single pulse tracking antenna on the network design is more complex, especially the need lor frequent calibration phase in use, and the resulting in instability, so that the antenna pointing error often appears. Stepping tracking method, the boot process can be in the program,according to the servo control system to continuously adjust the horoscope,aircraft latitude and longitude spirit antenna pointing and tracking signal superimposed with the step,in order to ensure the accuracy olthe antenna and tracking satellites. For step tracking technology is based on time-controlled manner,since tracking the progress is not enough, it can usually get 1/6 ol the hall-power beamwidth accuracy.Airborne satellite communication antenna practical applications, even il there is a big INS drift, steptracking mode antenna can still get the effect ol a long period ol stable tracking, visible step tracking method lor airborne satellite communications antenna in applications with leasibility.