Apparatus for maintaining a constant radial distance between a transmitting circuit and an antenna coil
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United States of America Patent
Stats
-
Dec 1, 1998
Grant Date -
N/A
app pub date -
Mar 24, 1997
filing date -
Apr 3, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vehicle including a frame member and a vehicle wheel mounted for rotation relative to the frame member about a rotation axis. The vehicle also includes a transmitting circuit mounted on a one of the frame member and the vehicle wheel. The transmitting circuit includes an antenna coil having a diameter. A ferrite core is mounted adjacent the transmitting circuit on the one of the frame member and the vehicle wheel. A non-planar, curved antenna coil is mounted on the other of the frame member and the vehicle wheel. The non-planar, curved antenna coil has a radius of curvature that is approximately equivalent to the rotational pathway of the transmitting circuit.
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