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一、前言极值跟踪能自寻最大场强信号。这不同于一般雷达目标跟踪那样寻求差方向图零点(零值跟踪)。极值跟踪省掉了跟踪馈源、跟踪接收机等,使设备简化。虽然跟踪精度低一些,但其增益损失可由馈源效率的提高得到部份补偿。所以在卫星通信地球站的天线跟踪中,极值跟踪的应用越来越广泛,方式也越来越多,在卫星通信船站中也广泛应用。对于陆用小口径天线,往往用“简易”的极值跟踪,其驱动系统为开环控制,场强电压采样、比较判决用模拟体制。对要求跟踪精度高一些的大口径天线往往用数字体制。而对于
First, the introduction of extreme tracking can find their own maximum field strength signal. This is different from the usual radar target tracking that seek the zero point of the pattern (zero tracking). Extreme tracking eliminates the need for tracking feeds, tracking receivers, etc. to simplify the device. Although the tracking accuracy is lower, the gain loss can be partly compensated by the increase of feed efficiency. So in the satellite communication earth station antenna tracking, the extreme value tracking application more and more widely, the way is also more and more widely used in satellite communication ship station. For land with a small aperture antenna, often with the “simple” extreme value tracking, the drive system for open-loop control, field voltage sampling, comparative judgment with the simulation system. On the requirements of higher tracking accuracy of large-caliber antenna often digital system. And for