RFID portal array antenna system
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United States of America Patent
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May 5, 2009
Grant Date -
Nov 29, 2007
app pub date -
May 24, 2007
filing date -
May 26, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
This invention provides an array antenna for a radio frequency identification (RFID) system, the array antenna comprises a transmission line with a longitudinal span proximately equaling to a height of a space desired to be covered by the array antenna, the transmission line having a terminal coupled to a RFID reader, and a plurality of radiating elements disposed on the first transmission line along the longitudinal span, additionally, reflective materials used behind the array antenna to maximize the illumination in the desired space and absorptive materials installed surrounding the desired space, in order to minimize the illumination of the undesired space surrounding the desired space.
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