H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
H01Q 3/16 (2006.01) H01Q 1/12 (2006.01) H01Q 3/02 (2006.01)
Patent
CA 2183119
A method and apparatus for pointing a tracking antenna to a communication satellite in the initial stage of satellite tracking by means of frequency shifting, upon reception of a carrier wave having deviation from the accepted standards of frequency, the antenna initial pointing apparatus including a downconverter for converting a signal received at a directive antenna to an IF signal, a synthesizer for providing the downconverter with a local signal for the IF signal conversion, a power detector for detecting the power of the IF signal, and a controller for controlling the synthesizer to generate the local signal and also for controlling the rotation of the directtive antenna. Based on a detected result from the power detector, a downconverted IF signal having deviation from the accepted standards of frequency is further converted to be included within a limited bandwidth of the power detector by means of frequency shifting.
Kirby Eades Gale Baker
Mitsubishi Denki Kabushiki Kaisha
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