DocumentCode
2667714
Title
SAW devices on lithium tetraborate (Li2B4O 7)
Author
Abe, Hidenori ; Ohmura, Masashi ; Saitou, Hisatoshi
Author_Institution
Div. of O&E Components, Japan Energy Corp., Saitama, Japan
fYear
1994
fDate
1-3 Jun 1994
Firstpage
289
Lastpage
295
Abstract
A 45° rotated X cut, Z propagation Li2B4O7 substrate has attracted attention as a piezoelectric substrate for SAW devices. The substrate is advantageous not for SAW transversal filter but for SAW resonator and resonator filter applications. It is especially suitable for SAW resonator filters which have the relative bandwidth of 0.3% to 0.6% considering coupling coefficient and temperature coefficient of delay. Also, the chip size of SAW resonator filters can be reduced because of the large reflection coefficient for aluminum strips on Li2B 4O7 substrates. SAW resonator filters which have low insertion loss, high rejection level and small size are reviewed and described for pager, CTI, GSM and cordless telephone receiver applications. Moreover, the fabrication process for Li2B4O7 substrates is also mentioned
Keywords
interdigital transducers; lithium compounds; piezoelectric materials; substrates; surface acoustic wave resonator filters; Al; CTI; GSM; Li2B4O7; Li2B4O7 substrate; SAW resonator filters; Z propagation Li2B4O7 substrate; aluminum strips; cordless telephone receiver; coupling coefficient; delay; fabrication; insertion loss; multielectrodes; pager; piezoelectric substrate; rejection level; rotated X cut substrate; temperature coefficient; Bandwidth; Delay; Lithium; Piezoelectric devices; Reflection; Resonator filters; Surface acoustic wave devices; Surface acoustic waves; Temperature; Transversal filters;
fLanguage
English
Publisher
ieee
Conference_Titel
Frequency Control Symposium, 1994. 48th., Proceedings of the 1994 IEEE International
Conference_Location
Boston, MA
Print_ISBN
0-7803-1945-1
Type
conf
DOI
10.1109/FREQ.1994.398322
Filename
398322
Link To Document