Radio frequency identification reader having antennas in different directions
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United States of America Patent
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May 8, 2012
Grant Date -
Apr 1, 2010
app pub date -
Sep 29, 2008
filing date -
Sep 29, 2008
priority date (Note) -
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Abstract
A radio frequency identification (RFID) reader includes a plurality of signal antennas, which are respectively arranged in directions that are not parallel to and co-linear with each other. Each of the signal antennas has a predetermined antenna field pattern and operates with a predetermined carrier wave frequency. A wireless receiver is connected to the signal antennas. A signal conversion unit is connected to the wireless receiver. A frequency generator generates the carrier wave frequency to the signal antenna. A microprocessor is connected to the signal conversion unit and the frequency generator.
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