US Patent 7561021 Identification device for motor vehicle

A device for identifying a motor vehicle comprising an identification unit carried by the user, a central onboard console (1) for verifying the user's identification data via an electromagnetic wave communication, through a resonant circuit having at least one tuning capacitor (13) and at least one coil transmitting/receiving (12) identification data; and at least one support module (10) comprising said transmission/reception coil and fitted at the vehicle door; said support module and said central console are spaced apart from each other and connected by electrical connection means; wherein the resonant circuit tuning capacitor is fitted in said support module (10) to limit parasitic radiation from the resonant circuit.