Abstract
The invention relates to a method for ranging a radio frequency tag, comprising measuring the modulated backscattering response of the tag at a plurality of frequencies using reader and determining the dispersive properties of the tag from the amplitude of the measured backscattering response. Further, the method comprises determining a position parameter of the tag from the measured modulated backscattering response and the determined dispersive properties of the tag.
| Original language | English |
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| Patent number | US2013038428 |
| IPC | G06K 7/ 01 A I |
| Priority date | 08/04/2011 |
| Publication status | Published - 14 Feb 2013 |
| MoE publication type | H1 Granted patent |