一、前言单轴驱动的卫星接收天线可以方便地接收多个卫星的信号,由于成本低设备简单且寻迹速度较快等优点,国内外都有不少应用。但由于存在固有指向误差,因而一般多用于方向性要求不高的场合。本文通过建立新的波束扫描方式,立足指向误差的优化设计和计算,证明固有指向误差完全可以减小到忽略不计的程度。并且,这样小的基础误差指标在工程上是可以简单实现的。因此,相同工艺水平条件下,指向误差可以有明显改善。二、基本问题卫星和地球表面上的观察点间的几何连线确定了一种理想的波束指引方向。由于卫星距 I. Introduction Single-axis driven satellite receiving antenna can conveniently receive signals of multiple satellites. Because of its low cost, simple equipment and fast tracing speed, it has many applications both at home and abroad. However, due to the inherent pointing error, it is generally used for less directional requirements of the occasion. In this paper, by establishing a new beam scanning method, based on the optimal design and calculation of pointing error, we prove that the inherent pointing error can be reduced to negligible extent. And, such a small basic error index in the engineering can be simple to achieve. Therefore, the same process level conditions, the pointing error can be significantly improved. Second, the basic problem Geometry and the geometric connection between the observation points on the Earth’s surface determines an ideal beam steering direction. Due to satellite distance