一、引言陆用卫星通信地面站所用天线,跟踪时运动速度很低。其跟踪卫星的目的是保证天线的工作增益。跟踪系统应根据这一特点进行工作,尤其对于天线口径小一些的移动站更应如此。一般的自动跟踪(零值跟踪)是由跟踪馈源、跟踪接收机、伺服系统等组成。这些对于雷达系统是必要的,而用于卫星通信地面站就过于复杂。在一个移动站上,甚至可以用简单手控工作,即由人控制按钮,给交流三相异步电机加电,控制电机正、反转带动天线寻求最 I. INTRODUCTION Antenna used in terrestrial satellite communications for land use has a very low speed of motion during tracking. The purpose of tracking satellite is to ensure the work of the antenna gain. The tracking system should work according to this feature, especially for mobile stations with smaller antennas. General automatic tracking (zero tracking) is by the tracking feed, tracking receiver, servo system and other components. These are necessary for a radar system, whereas ground stations for satellite communications are too complex. In a mobile station, you can even use a simple manual control, that is, by the control button, the AC three-phase asynchronous motor power, control the motor is positive, reverse the antenna to seek the most