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1.发明授权
公开(公告)号：US4801940A
公开(公告)日：1989-01-31
申请号：US792786
申请日：1985-10-30
CPC分类号： H01Q3/005 , H01Q1/1257
摘要： A TVRO earth station having a satellite seeking system comprising at least one controllable motor for adjusting the position of an antenna for receiving signals from a satellite having multiple transponders transmitting signals at prescribed nominal center frequencies and with different polarizations, control means for energizing the motor to move said antenna along a predetermined satellite-searching path, a receiver for receiving the incoming signals from the antenna and successively tuning to the center frequencies at each of a succession of intervals along the searching path, means responsive to the signals detected by the receiver for producing a signal or value representing the quality of the detected signals at each of the successive intervals along the searching path, and means responsive to the quality-representing signal or value for identifying the locations along the searching path at which the antenna receives signals from a satellite.
摘要翻译： 一种具有卫星搜索系统的TVRO地球站，包括至少一个可控电动机，用于调整用于接收来自卫星的位置的天线的位置，所述卫星具有多个转发器以规定的额定中心频率和不同的偏振度发送信号;控制装置， 沿着预定的卫星搜索路径移动所述天线，接收机，用于接收来自天线的输入信号，并且沿着搜索路径在连续的间隔中的每一个处连续地调谐到中心频率;响应于接收机检测到的信号， 产生表示沿着搜索路径的每个连续间隔中检测到的信号的质量的信号或值，以及响应于质量表示信号或值的装置，用于识别沿天线从天线接收信号的搜索路径的位置 卫星。
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公开(公告)号：US4785302A
公开(公告)日：1988-11-15
申请号：US792780
申请日：1985-10-30
CPC分类号： H01Q1/1257 , H01Q21/245
摘要： In a TVRO earth station having an antenna for receiving incoming satellite signals and polarizing means associated with the antenna for adjusting the relative alignment of the antenna orientation and the polarization of the incoming signals, an automatic polarization control system comprising means for producing an electrical control signal for controlling the polarizing means to adjust the relative alignment, means for detecting the noise level in the satellite signals received by the antenna, and means responsive to the detected noise level for adjusting the control signal, and thereby adjusting the polarizing means, to minimize the detected noise level.
摘要翻译： 在具有用于接收传入卫星信号的天线的TVRO地球站和与天线相关联的偏振装置，用于调整天线方向和入射信号的极化的相对对准，自动偏振控制系统包括用于产生电控信号 用于控制偏振装置调节相对对准的装置，用于检测由天线接收的卫星信号中的噪声电平的装置，以及响应于检测到的噪声电平的装置，用于调节控制信号，从而调节偏振装置，以最小化 检测到噪声水平。
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搜索结果
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