Title :
Measurement of BAW radiation from low-loss LSAW resonators
Author :
Knuuttila, J.V. ; Saarinen, J. ; Hartmann, C.S. ; Plessky, V.P. ; Salomaa, M.M.
Author_Institution :
Mater. Phys. Lab., Helsinki Univ. of Technol., Espoo, Finland
fDate :
8/2/2001 12:00:00 AM
Abstract :
The first direct experimental observation of bulk-acoustic wave radiation from a leaky surface-acoustic wave transducer, measured arriving at the backside of the piezoceramic substrate, is reported. A scanning laser-interferometric probe is used to map the spatial distribution of the bulk-wave radiation patterns on the substrate bottom. The different energy-flow angles into the substrate are obtained as functions of frequency and used to identify the corresponding bulk-wave modes arriving at the substrate bottom
Keywords :
acoustic microwave devices; light interferometry; surface acoustic wave resonators; surface acoustic wave transducers; ultrasonic waves; 906 MHz; 934 MHz; BAW radiation; LiTaO3; LiTaO3 substrate; bulk-acoustic wave radiation; bulk-wave modes; bulk-wave radiation pattern spatial distribution; energy-flow angles; leaky surface-acoustic wave transducer; low-loss LSAW resonators; piezoceramic substrate backside; scanning laser-interferometric probe;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010703
