To sufficiently cope with large swing of a hull and to hold a lens antenna at or below a prescribed angle within an angle accuracy range required at the time of reception from a satellite while corresponding to a large angle swing of the hull and a cycle.
The lens antenna apparatus comprises: a lens antenna part 10 provided with a hemispherical Luneberg lens 11 for converging radio waves, a reflection plate 12 for reflecting the radio waves, a radiator 13 including an antenna element for receiving or transmitting and receiving the radio waves, and a fine adjustment mechanism 14 for driving and adjusting an angle state including an azimuth and an elevation angle to the satellite; and a horizontal stabilization part 20 provided with an active and gimbal type coarse adjustment mechanism 24 for driving and adjusting a horizontal angle state including the azimuth and elevation angle to the satellite at the lower part of the lens antenna part 10. Then, the horizontal stabilization part 20 is controlled via the coarse adjustment mechanism 24 so as to hold the lens antenna part 10 at or below the prescribed angle within the angle accuracy range required correspondingly to the large angle swing of the hull S and the cycle, and the lens antenna part 10 is controlled to be at or below the possible prescribed angle by the fine adjustment mechanism 14.
SUZUKI MASAHITO
KISHIMOTO TETSUO
URA YASUHIKO
JSAT CORP
Torii Kazuhisa
Takayoshi Tagawa
Higashio Masahiro
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