Title :
Crystal orientations for natural single phase unidirectional transducer (NSPUDT) on Li2B4O7
Author :
Takeuchi, Masaru ; Odagawa, Hiroyuki ; Yamanouchi, Kazuhiko
Author_Institution :
Dept. of Electr. Commun., Tohoku Univ., Sendai
fDate :
11/24/1994 12:00:00 AM
Abstract :
New natural single phase unidirectional transducer (NSPUDT) orientations on a lithium tetraborate (Li2B4O7) substrate are reported. The orientations of the Euler angles (0°, 18°, 90°) and (0°, 51°, 90°) give an optimum phasing (±45°) between the transduction and reflection centres for an ideal NSPUDT action. The (0°, 78°, 90°) cut with zero temperature coefficient of delay (TCD) gives an NSPUDT with high directivity
Keywords :
crystal orientation; interdigital transducers; lithium compounds; piezoelectric materials; surface acoustic wave transducers; ultrasonic reflection; Euler angles; IDT electrode reflection; Li2B4O7; SAW devices; crystal orientations; directivity; lithium tetraborate; natural single phase; optimum phasing; reflection centres; transduction centres; unidirectional transducer; zero temperature coefficient of delay;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19941407
