Patent ID: 6696923
Filing Date: 2004-02-24
Classification: G06K,H04B

Abstract:
A method for reducing the effect of disturbance signals in a system including a transponder and a reader, said method comprising:emitting a signal from the transponder receiving the signal emitted by the transponder in a reader having a first receiving unit and a second receiving unit, wherein the energy levels of the transponder signals which are received by said first and second receiving units are substantially different, receiving a disturbance signal emitted by a disturbance source by both of said first and second receiving units, wherein the energy levels of the disturbance signals which are received by said first and second receiving units are substantially the same, providing a first output signal from said first receiving unit and providing a second output signal from said second receiving unit, wherein each of said first and second output signals comprising a transponder signal component and a disturbance signal component, and combining said output signals of said first and second receiving units for generating a third output signal, said third output signal comprising a transponder signal component which is much larger than a disturbance signal component of said third output signal.