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    Steerable antenna and receiver interface for terrestrial broadcast
    3.
    发明授权
    Steerable antenna and receiver interface for terrestrial broadcast 失效

    公开(公告)号：US07006040B2

    公开(公告)日：2006-02-28

    申请号：US10020703

    申请日：2001-11-30

    申请人： John G. N. Henderson ,  Carl Scarpa

    发明人： John G. N. Henderson ,  Carl Scarpa

    IPC分类号： H01Q3/24

    CPC分类号： H01Q1/007 ,  H01Q1/24 ,  H01Q3/2611 ,  H01Q7/005

    摘要： Antennas with steerable antenna patterns and techniques for using such antennas are described. In accordance with the invention, antenna patterns with one or more NULLs are used. Through the use of digital control signals the antenna pattern is steered so that a source of signal interference, e.g., a multipath signal, will be located in a NULL. In this manner the received signal's S/N ratio can be maximized thereby facilitating demodulation. The techniques of the invention can be applied to television, computer devices, mobile devices and a wide range of other systems. Digital commands to control an antenna may include multiple information fields, e.g., a direction field, a channel field, a gain field and a polarity field. Antennas incapable of supporting the specified fields disregard information in fields which are not supported. Information in each supported field is decoded and used to adjust the corresponding antenna characteristic.