Title :
Second harmonic reflectors
Author :
Lehtonen, S. ; Koskela, J. ; Plessky, V.P. ; Salomaa, M.M.
Author_Institution :
Mater. Phys. Lab., Finland
Abstract :
In this work, we study theoretically the operation of surface-acoustic wave (SAW) reflectors on the second harmonic frequency. There is a renewed interest in second harmonic reflectors for high-frequency devices and for sensor and tag applications. Here, we demonstrate that the reflectivity of the 2nd harmonic reflectors can be very high, e.g., on 128°-LiNbO3. We have simulated performances of a few typical SAW devices with such reflectors. Two times larger period of the structure makes it easy for production even in the frequency range from 2 to 3 GHz
Keywords :
reflectivity; surface acoustic wave devices; surface acoustic wave resonators; ultrasonic reflection; 128 degree LiNbO3; 2 to 3 GHz; LiNbO3; LiTaO3; SAW devices; SAW reflectors; high-frequency devices; reflectivity; second harmonic reflectors; sensor applications; surface acoustic wave reflectors; tag applications; Fabry-Perot; Frequency; Gratings; Laboratories; Physics; Power harmonic filters; Production; Reflectivity; Scattering; Surface acoustic waves;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.922542
