Patent ID: 8322624
Filing Date: 2012-12-04
Classification: G06K,H01L,H04B

Abstract:
1. Smart card comprising: a multi-layer substrate; a transponder module comprising an RFID chip disposed in a first layer of the multi-layer substrate; a first antenna disposed in the first layer of the multi-layer substrate and connected to the transponder module; and a second antenna which is a coupling antenna disposed in a second layer of the multi-layer substrate which is underlying the first layer so that the second antenna is inductively coupled with the first antenna; wherein the first and second antennas are not connected with one another, but rather are inductively coupled with one another; and wherein the first antenna is tuned to a first frequency which is relatively far from a desired operating frequency for the RFID chip, and the second antenna is tuned to a frequency which is relatively close to the desired operating frequency.