Measurement electronics
Radiofrequency acoustic passive wireless sensors - Interrogations strategies

Now that the architecture of the cooperative target has been defined, and its spectral and temporal characteristics determined, the next question is how to probe the response of this transducer via a radio-frequency link (figure  4 ). Short-range RADAR meets the requirement of characterizing the response of the cooperative target via a wireless link, without the need for an energy source in the vicinity of the sensing element. The counterpart of the two main sensor architectures – resonator or delay line – in terms of measurement electronics are variations in the time or spectral domains. We have already mentioned that these two measurement strategies are dual through the Fourier transform, and only technology and compliance with standards favor one or...