| 摘要 |
<p>For acquiring data of dynamic physical processes via a radio link, a transponder antenna (17) is excited by an electromagnetic exciting wave at the resonance frequency of the transponder antenna (17), and a back-scattered electromagnetic sensor wave which is modulated by a sensor (16) having an electrical impedance dependent of the data to be acquired is received an analysed. The sensor (16) is directly connected to the transponder antenna (17) so that the sensor changes the eletrical impedance of the transponder antenna (17) with every variation of the data to be acquired. The electromagnetic wave which is back- scattered by the transponder antenna (17) is received as the sensor wave at the same time as the transponder antenna (17) is excited by the exciting wave.</p> |
