| 摘要 |
<p>The invention relates to an antenna extender (20) intended to be coupled electromagnetically to an RFID read/write station (10), said extender (20) comprising a first circuit (21) oscillating at variable frequency and a second oscillating circuit (31) coupled to the first oscillating circuit (21). The extender comprises a processing unit (35) which is powered by energy supplied by the second oscillating circuit when the extender is placed close to the read/write station (10). The processing unit includes means for measuring voltage at the terminals of the second oscillating circuit and control means that can be used to vary the resonance frequency of the first oscillating circuit as a function of the value of the measured voltage, in order to optimise the frequency tuning between the extender and the read/write station.</p> |
