| 摘要 |
A device for detecting the presence of a transponder in its vicinity, comprising: an antenna; pulse generation unit; unit adapted to feed the antenna with the pulses; unit for measuring the damped oscillations of the antenna as a consequence of being fed with the pulses; the unit for measuring the damped oscillations of the antenna determining whether a transponder is present or not in the vicinity of the antenna on the basis of the characteristics of the damped oscillations.
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