Compact dual-mode UHF RFID reader antenna systems and methods
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United States of America Patent
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Nov 27, 2012
Grant Date -
Jun 16, 2011
app pub date -
Dec 11, 2009
filing date -
Dec 11, 2009
priority date (Note) -
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Abstract
The present disclosure relates to compact, dual-mode ultra high frequency (UHF) radio frequency identification (RFID) reader antenna systems and methods capable of supporting both long range and short range applications. The present invention includes a dual-mode antenna design, a dual-mode RFID reader utilizing the dual-mode antenna design, and an associated usage method. The dual-mode antenna design may include a patch operating mode for long range applications and a slot operating mode for short range applications. Additionally, the dual-mode antenna design may include mechanisms to improve the patch operating mode bandwidth, circular polarization in the patch operating mode, and dual polarization in the slot operation mode.
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