RADIO FREQUENCY IDENTIFICATION SIGNAL RECEIVING DEVICE AND POSITIONING SYSTEM USING THE SAME
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United States of America Patent
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Issued Date -
Jan 12, 2012
app pub date -
Jul 9, 2010
filing date -
Jul 9, 2010
priority date (Note) -
Abandoned
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Abstract
An RFID signal receiving device includes a receiving element disposed inside an electromagnetic absorption shell. Radio frequency signals emitted from a signal source can only enter the interior of the electromagnetic absorption shell through a window formed on the electromagnetic absorption shell. Therefore, only the radio-frequency signals which pass the windows can be received by the receiving element, so as to define a viewing angle of the receiving element through the window. Through the window, the directional receiving characteristic of the RFID signal receiving device is achieved by relatively a simpler structure.
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