公开(公告)号：US4837576A

公开(公告)日：1989-06-06

申请号：US672579

申请日：1984-11-16

申请人： Helmut E. Schwarz

发明人： Helmut E. Schwarz

IPC分类号： G01S13/68 ,  G01S13/86 ,  G01S13/87

CPC分类号： G01S13/87 ,  G01S13/68 ,  G01S13/86

摘要： An antenna tracking system tracks a primary antenna to follow a moving signal source, such as a communication satellite. A secondary antenna has a greater beam width than the primary antenna and receives the same tracking signal from the satellite. The primary antenna is tracked according to a predetermined search pattern which causes a variation in the signal amplitude depending upon the relative location of the satellite and the antenna position. The signal strength signals from the two antennas are input to a summation function which takes the difference of the two signals. The noise and signal variation component of the two signals is substantially the same and is therefore eliminated from the resulting difference signal. An antenna control unit utilizes the resulting difference signal to select the optimum signal strength for the particular step of the search pattern. This system is particularly applicable to high frequency communication channels in the higher (86 Ghz and above) frequency band which are subject to atmospheric distortion and noise.

摘要翻译： 天线跟踪系统跟踪主天线以跟随移动信号源，例如通信卫星。 辅助天线具有比主天线更大的波束宽度，并从卫星接收相同的跟踪信号。 主天线根据预定的搜索模式进行跟踪，该搜索模式根据卫星的相对位置和天线位置而引起信号幅度的变化。 来自两个天线的信号强度信号被输入到获得两个信号的差的求和函数。 两个信号的噪声和信号变化分量基本相同，因此从得到的差分信号中消除。 天线控制单元利用得到的差分信号为搜索模式的特定步骤选择最佳信号强度。 该系统特别适用于经受大气失真和噪声的较高（86GHz以上）频段的高频通信信道。