Patent ID: 7453408
Filing Date: 2008-11-18
Classification: G06K,H01Q

Abstract:
1. Resonant detection or identification antenna of the type comprising at least one turn which comprises at least one electrically conducting wire and is connected to a transponder electronic chip, the operating frequency of said antenna being greater than or equal to 10 MHz, an area defined by said at least one turn being substantially less than or equal to 0.30 m 2 , wherein a total capacitance of the antenna is substantially greater than or equal to 140 pF and a Q-factor of said at least one turn is substantially greater than or equal to 30, wherein the transponder chip has a first capacitor of predetermined value and wherein a second capacitor is placed in parallel with the electronic chip in such a way that the overall capacitance of the antenna is greater than or equal to 140 pF.