Communication apparatus using radio waves between rotator and stator
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United States of America Patent
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Mar 21, 2017
Grant Date -
Dec 24, 2015
app pub date -
Jan 30, 2013
filing date -
Jan 30, 2013
priority date (Note) -
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Abstract
An insulating transmission medium with high insulation reliability which transmits electromagnetic energy between circuits having different reference voltages, with low loss, in small size, and at low cost, and a communication apparatus which uses radio waves between a rotator and a stator to perform two-way communication between at least one rotator-specific communication device placed on a rotator. One stator-specific communication device is placed on a stator and is connected to multiple stator-specific antennas. The rotator-specific communication device is connected to at least one rotator-specific antenna, and includes a signal strength indicator. The stator-specific communication device includes a phase shifter which increases or decreases the phase angle of the signal by a phase shift amount in such a manner as that the signal strength is equal to or more than a predetermined value.
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