Title :
Properties of radio frequency Rayleigh waves on langasite at elevated temperatures
Author :
Fachberger, R. ; Bruckner, G. ; Hauser, R. ; Biniasch, J. ; Reindl, L. ; Ruppel, C.
Author_Institution :
Carinthian Tech Res., Villach, Austria
Abstract :
The properties of Rayleigh waves operating both at radio frequency (RF) and at high temperatures (HT) on langasite crystal cuts with Euler angles of (0°, 138.5°, 26.6°) and (0°, 30.1°, 26.6°) are investigated. By evaluating the frequency response of surface acoustic wave (SAW) test devices the SAW velocity, the coupling factor, and the propagation attenuation have been determined experimentally in a temperature range from 20°C to 500°C. The SAW devices could be operated up to frequencies of 3 GHz. However, considering a future sensor application a limiting factor is a strong increase of the acoustic losses in conjunction with frequency and temperature.
Keywords :
Rayleigh waves; acoustic wave propagation; frequency response; surface acoustic wave devices; 20 to 500 degC; Euler angles; RF waves; SAW test devices; SAW velocity; acoustic losses; coupling factor; elevated temperatures; frequency response; langasite crystal cuts; propagation attenuation; radio frequency Rayleigh waves; sensor application; surface acoustic wave test devices; Acoustic propagation; Acoustic testing; Acoustic waves; Attenuation; Frequency response; Radio frequency; Response surface methodology; Surface acoustic wave devices; Surface acoustic waves; Temperature sensors;
Conference_Titel :
Ultrasonics Symposium, 2004 IEEE
Print_ISBN :
0-7803-8412-1
DOI :
10.1109/ULTSYM.2004.1418008
