Sensor element, test device, and method for testing a data carrier having a spin resonance feature
AssigneeGiesecke+Devrient Currency Technology GmbH
InventorStephan Huber
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Abstract
A sensor element is for testing a planar data carrier that has a spin resonance feature. The sensor element includes: a magnetic core having an air gap into which the planar data carrier can be inserted for testing purposes; a polarization device for generating a static magnetic flux in the air gap; and a resonator device for exciting the spin resonance feature of the data carrier to be tested in the air gap. The resonator device has a stripline resonator and a supply structure for the stripline resonator and is designed to generate a high-frequency field with circular polarization owing to the geometry of the stripline resonator and/or the geometry of the supply structure.
Claims14
A sensor element for testing a planar data carrier having a spin resonance feature, comprising:
- a magnetic core with an air gap, into which the planar data carrier can be inserted for testing purposes,
- a polarization device for creating a static magnetic flux in the air gap, and
- a resonator device for exciting the spin resonance feature of the data carrier to be tested in the air gap,
- wherein the resonator device comprises a stripline resonator and a feedline structure for the stripline resonator and is designed to create a radiofrequency field with circular polarization by way of the geometry of the stripline resonator and/or the geometry of the feedline structure.
Dependencies are inferred from the claim text.