公开(公告)号：US5488379A

公开(公告)日：1996-01-30

申请号：US369040

申请日：1995-01-05

申请人： Thomas Jackson ,  Mark Murr

发明人： Thomas Jackson ,  Mark Murr

IPC分类号： H01Q1/12 ,  H01Q3/00

CPC分类号： H01Q3/005 ,  H01Q1/1257

摘要： An apparatus for orienting a directional antenna of a remote ground terminal which receives a signal from a satellite. The apparatus includes a down-converter for demodulating the signal to an intermediate frequency signal. The down-converter includes an automatic gain control loop for maintaining the intermediate frequency signal at a predetermined power level. The apparatus further includes a controller coupled to the down-converter so as to monitor a voltage level of the automatic gain control loop. The apparatus also includes a controller operative to generate a difference signal corresponding to the difference of the voltage level when the signal from the satellite is being received by the down-converter from when the signal from the satellite is not received by the down-converter. The difference signal varies proportionally with the amplitude of the signal from the satellite received by the down-converter.

摘要翻译： 用于定向从卫星接收信号的远程接地终端的定向天线的装置。 该装置包括用于将信号解调为中频信号的下变频器。 下变频器包括用于将中频信号保持在预定功率电平的自动增益控制回路。 该装置还包括耦合到下变频器以控制自动增益控制环路的电压电平的控制器。 该装置还包括一个控制器，用于当来自卫星的信号正在被下变频器接收时，当来自卫星的信号未被下变频器接收时，产生对应于电压电平差的差信号。 差分信号与由下转换器接收的卫星的信号的幅度成比例地变化。