Electronic Communication System, in Particular Authentication Control System, as Well as Corresponding Method

• US 20080211621A1
• Filed: 05/22/2006
• Published: 09/04/2008
• Est. Priority Date: 05/23/2005
• Status: Abandoned Application

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Nowottnick, Juergen, Soerensen, Soeren
• Application Number:
  US11/915,185
• Publication Number:
  US 20080211621A1
• Time in Patent Office: Days
• US Class Current: 340/5.2
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: G06K 19/0726 the arrangement including a circuit for tuning the resonance frequency of an antenna on the record carrier

Abstract

In order to provide an electronic communication system (100), having at least one base station (10) with at least one antenna unit (16), in particular in coil form; and at least one transponder station (40), in particular in data carrier form, with at least one antenna unit (32), in particular in coil form, for receiving electromagnetic radiation (26) in form of power to be supplied by the base station (10) with a particular carrier frequency and for exchanging data signals (22, 24) with the base station (10), wherein the receiving frequency (f) can be adapted, in particular optimized, during operation, it is proposed that the electronic communication system (100) comprises at least one controller unit (36) for controlling the receiving frequency (f) of the antenna unit (32) of the transponder station (40) during operation of the communication system (100), in particular for adapting the resonant frequency of the antenna unit (32) of the transponder station (40) to the carrier frequency defined by the base station (10).

Claims

1. An electronic communication system, having

at least one base station with at least one antenna unit, in particular in coil form;

and

at least one transponder station, in particular in data carrier form, with at least one antenna unit, in particular in coil form,

for receiving electromagnetic radiation in form of power to be supplied by the base station with a particular carrier frequency and

for exchanging data signals with the base station,

characterized by at least one controller unit for controlling the receiving frequency of the antenna unit of the transponder station during operation of the communication system, in particular for adapting the resonant frequency of the antenna unit of the transponder station to the carrier frequency defined by the base.

2. The electronic communication system according to claim 1, characterized in that the receiving frequency is controlled in a continuous and/or linear and/or steady mode.

3. The electronic communication system according to claim 1, characterized in that the receiving frequency is defined by at least one circuit arrangement, in particular by at least one receiving oscillator circuit, for example by at least one resonant LC circuit, which circuit arrangement is assigned to the transponder station and comprises

at least one capacitive element, being in particular connected in parallel to the antenna unit of the transponder station, and

at least one resistor element, wherein

the resistance value of the resistor element is controllable by the controller unit and/or

the resistor element is connected in parallel to the capacitive element and/or to the antenna unit of the transponder station.

4. The electronic communication system according to claim 3, characterized in that the resistor element is serially connected

to at least one further capacitive element, in particular to at least one condenser unit, being controllable by the controller unit or

to at least one further inductive element, in particular to at least one coil unit, being controllable by the controller unit.

5. A base station for an electronic communication system according to claim 1,

characterized by being designed for providing the transponder station with electromagnetic radiation in form of power comprising a particular carrier frequency.

6. A transponder station for an electronic communication system according to at least one of claim 1,

characterized by the controller unit being designed for adapting the receiving frequency to the carrier frequency defined by the base station in such a way that the receiving frequency substantially or approximately equals the carrier frequency.

7. A communication method

for providing at least one transponder station, in particular at least one data carrier, with electromagnetic radiation in form of power to be supplied by at least one base station with a particular carrier frequency and

for exchanging data signals within an electronic communication system, in particular according to the preamble of claim 1,

characterized in that the receiving frequency of the transponder station is controlled during operation of the communication system, in particular that the resonant frequency of the transponder station is adapted to the carrier frequency defined by the base station.

8. The method according to claim 7, characterized in that the receiving frequency is controlled in a continuous and/or linear and/or steady mode.

9. The method according to claim 7, characterized in that the receiving frequency is adapted to the carrier frequency in such a way that the receiving frequency substantially or approximately equals the carrier frequency.

10. Use of at least one electronic communication system according to claim 1,

of at least one base station, said base station can be arranged in particular on or in an object to be secured against unauthorized use and/or against unauthorized access, such as on or in a transport means or on or in an access system, and

of at least one transponder station, said transponder station can be carried with him or her by an authorized user, and/or of the method

for determining the authorization for use and/or for access by means of the data signals being exchanged between the base station and the transponder station, the data signals being designed

for controlling the base station, and/or

for authenticating and/or for identifying and/or for checking the authority to use, to access, to enter or the like an object to be secured, for example a transport means and/or an access system, and/or

for transponder based or chip card based systems, which in spite of high tolerances of the components of the circuit arrangement require a defined and stable resonant frequency in order to achieve maximum range of bidirectional communication, in particular for access systems, in automotive and non-automotive applications, for example for electronic immobilizer systems for vehicles.