SUMMARY

The work developed in this presentation targets two applications relative to piezoelectric transduction for sensing and data transmission purposes. The first project is based on a Surface Acoustic Wave device measuring strains in two directions along a plane. Such a device has been manufactured using microfabrication methods, before being tested to determine its accuracy and its compliance with theoretical results. The second project involves data transmission across a metallic barrier through piezoelectric transduction. A theoretical model has been derived to describe the electric and mechanical behaviors of the channels and compared with numerical and experimental results. Different approaches modifying the mechanical structure and the connected electric circuits have been pursued with the objective of reducing the amplitude variations down to 2dB over large bandwidths for low carrier frequencies (below 10 MHz). Transducer designs in the shape of staircases have been proposed for channels with high carrier frequencies (>100 MHz) in order to communicate over bandwidths larger than 100 MHz within which the amplitude variations are limited to 3 dB.