Patent ID: 6191734
Filing Date: 2001-02-20
Classification: H01Q

Abstract:
In a satellite tracking control system for vehicle-mounted receive antenna systems comprising a radome, a rotating part for receiving a satellite signal while rotating for satellite tracking, and a fixed part connected to the rotating part by a rotary joint, for controlling the satellite tracking of the rotating part using a motor control and satellite tracking section for the satellite tracking, said rotating part comprising:a radiating and active channel section for receiving the satellite signal via the radome;a power combiner and beam forming section for detecting a main beam signal and a tracking beam signal from an output signal of said radiating and active channel section;a frequency converter for converting the main beam signal into a signal of a frequency band suitable for reception of satellite broadcasting to provide a satellite broadcasting receiving signal;a tracking signal converter for detecting a tracking beam strength signal based upon the tracking beam signal;an angular rate sensor for sensing an absolute angular rate of said rotating part; anda beam steering control section for receiving an angular rate sensing signal, the tracking beam strength signal, and a control signal of said fixed part for motor control and satellite tracking, for generating a channel selection control signal to said tracking signal converter for controlling a tuner for channel selection and for generating a tracking beam control signal to said power combiner and beam forming section and a phase control signal to said radiating and active channel section.