| 摘要 |
A method for contactlessly checking the functionality of an antenna coil for a portable data carrier comprises the steps of exciting the antenna coil, detecting the free, damped oscillation of the antenna coil in response to the excitation, and evaluating the detected free, damped oscillation. The excitation of the antenna coil is effected inductively through a pulsed magnetic field, which may be generated by a single direct-current pulse, such as a a Dirac pulse, by means of an exciting coil attached to a pulse generator. The detection of the oscillation of the antenna coil is effected through a measuring antenna, and the evaluation is effected by means of an evaluation device connected to the measuring antenna. |
