Reading device for contactless communication with a transponder unit
First Claim
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1. A reading device for contactless communication with a transponder unit, comprising:
- a first antenna for generating a reading device field in the form of an alternating magnetic field;
at least one second antenna,wherein the at least one second antenna is configured and arranged in relation to the first antenna such that simultaneously while performing contactless communication of the reading device via the first antenna with a transponder unit generating communication signals by means of load modulation, through the at least one second antenna a detection signal is generated,wherein the reading device is configured to determine a proximity of the transponder unit communicating with the reading device based on the detection signal, and, based on a determination of the proximity of the transponder unit, the reading device is configured to determine whether the transponder unit communicating with the reading device is an attacking device.
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Abstract
A reading device for contactless communication with a transponder unit includes a first antenna for generating a reading device field in the form of an alternating magnetic field. The reading device further contains one or more second antennas configured, and arranged in relation to the first antenna, such that during a contactless communication of the reading device with a transponder unit which generates communication signals by means of load modulation, a predetermined change of a detection signal is captured on the second antenna or antennas if the transponder unit is located in a predetermined zone around the reading device.
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Citations
18 Claims
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1. A reading device for contactless communication with a transponder unit, comprising:
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a first antenna for generating a reading device field in the form of an alternating magnetic field; at least one second antenna, wherein the at least one second antenna is configured and arranged in relation to the first antenna such that simultaneously while performing contactless communication of the reading device via the first antenna with a transponder unit generating communication signals by means of load modulation, through the at least one second antenna a detection signal is generated, wherein the reading device is configured to determine a proximity of the transponder unit communicating with the reading device based on the detection signal, and, based on a determination of the proximity of the transponder unit, the reading device is configured to determine whether the transponder unit communicating with the reading device is an attacking device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for operating a reading device, the method comprising the steps of:
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generating by the reading device a reading device field in the form of an alternating magnetic field; performing, by a first antenna of the reading device, contactless communication with a transponder unit by generating communication signals by means of load modulation; generating by a second antenna of the reading device a detection signal, the detection signal being generated by the second antenna and detected by the reading device simultaneously to the step of detection of performing contactless communication with the transponder unit by a first antenna of the reading device; determining, by the reading device, a proximity of the transponder unit communicating with the reading device based on the detection signal; and determining, by the reading device, whether the transponder unit communicating with the reading device is an attacking device based on a determination of the proximity of the transponder unit. - View Dependent Claims (17, 18)
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Specification