| 摘要 |
<p>An antenna extender configured to be coupled electromagnetically to an RFID read/write station. The extender includes a first circuit oscillating at variable frequency and a second oscillating circuit coupled to the first oscillating circuit, and a processing unit which is powered by energy supplied by the second oscillating circuit when the extender is placed close to the read/write station. The processing unit includes a mechanism to measure voltage at terminals of the second oscillating circuit and a controller that can be used to vary resonance frequency of the first oscillating circuit as a function of the value of the measured voltage to optimize frequency tuning between the extender and the read/write station.</p> |
