Method of and apparatus for acquiring data of dynamic physical processes via a radio link

摘要

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 depending on the data to be acquired is received and analyzed. The sensor ( 16 ) is directly connected to the transponder antenna ( 17 ) such that the sensor changes the electrical 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.