Sensor element, test device, and method for testing a data carrier having a spin resonance feature

Abstract

A sensor element for testing a flat-surface data carrier having a spin resonance feature. The sensor element includes a magnetic core with an air gap, into which the flat-surface data carrier can be inserted for testing, 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 contains a plurality of stripline resonators, designed and configured to be operated independently at the same excitation frequency. The polarization device generates a homogeneous magnetic flux in the air gap so that the static magnetic flux for each pair of stripline resonators of the resonator device has substantially the same field strength at the position of a first stripline resonator as at the position of a second stripline resonator.

Dependencies are inferred from the claim text.