Antenna apparatus and waveguide rotary coupler
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTomoaki Fukushima, Ichiro Shirokawa, Hidetaka Yamauchi, Yoshihiko Konishi, Akio Iida
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Abstract
An AC power source applies power to a primary coil that is provided in a fixed part. An AC current flowing through the primary coil induces electromotive force in a secondary coil that is provided in a movable part. The AC electromotive force induced in the secondary coil is converted by an AC/DC converter into DC power, which is input to a drive control section.
Claims14
An antenna apparatus which performs microwave communication in such a manner that a radio signal generated by a transceiver that is provided in a fixed part is supplied to an antenna that is provided in a movable part and the antenna is drive-controlled, comprising:
- a drive control section provided in the movable part, for drive-controlling a motor for rotating the antenna;
- a wave guide rotary coupling device for transmitting a radio signal from the transceiver to the antenna;
- a primary coil provided in the fixed part;
- and
- a secondary coil provided in the movable part, for supplying the drive control section with electromotive force that is inducted in itself by a current flowing through the primary coil.
A waveguide rotary coupler comprising:
- a first waveguide member having a first waveguide that is circular in cross-section;
- a second waveguide member having a second waveguide having approximately the same cross-section as the first waveguide, an end face of the second waveguide member being opposed to an end face of the first waveguide member;
- a rotary bearing that couples the first waveguide member and the second waveguide member in such a manner that they are rotatable about a central axis of the first and the second waveguides;
- a first coil holder that is provided on the first waveguide member in a ring-like manner with the central axis of the first and second waveguides as a center and that holds a first coil;
- and
- a second coil holder that is provided on the second waveguide member in a ring-like manner with the central axis of the first and second waveguides as a center, and that holds a second coil that is opposed to the first coil,
- wherein the first and second coil holders are so shaped as to surround the first and second coils in a cross-section that is obtained by cutting the first and second coil holders by a plane including the central axis of the first and second waveguides.
Dependencies are inferred from the claim text.