DocumentCode :
1810385
Title :
Theoretical and experimental study on strip reflection coefficient of different crystal symmetry class
Author :
Xu, Fang-qian ; Jin, Bu-ping
Author_Institution :
Zhejiang Univ. of Media & Commun., Hangzhou, China
fYear :
2009
fDate :
17-20 Dec. 2009
Firstpage :
133
Lastpage :
133
Abstract :
The closed-form expressions of strip reflection coefficients of tetragonal 4/mmm, hexagonal 6/mm and trigonal 3m crystal etc are derived, which are different from that of cubic m3m crystals obtained. The reflection coefficients for short-circuited Al grating and groove grating on 112° rotated X-cut Y-propagation LiTaO3 are then given in the paper. The reflection property of the groove grating on 112° LiTaO3 in which short-circuited Al grating was placed has been studied by an experimental method and the condition that internal reflection is close to zero was achieved. It concluded that the structure of single finger without internal reflection can be realized by placing short-circuited Al strip in groove grating on 112° LiTaO3 and thereafter a pass-band filter with central frequency 255MHz, bandwidth about 10MHz, pass-band ripples less than 0 .4dB are yielded by utilizing those results in the study of single finger without internal reflection.
Keywords :
aluminium; band-pass filters; diffraction gratings; lithium compounds; optical filters; optical materials; reflectivity; Al-LiTaO3; crystal symmetry class; groove grating; hexagonal 6/mm crystal; internal reflection; pass-band filter; pass-band ripples; short-circuited grating; short-circuited strip; strip reflection coefficient; tetragonal 4/mmm crystal; trigonal 3m crystal; Acoustic reflection; Band pass filters; Closed-form solution; Crystals; Fingers; Frequency; Gratings; Strips; Surface acoustic waves; Virtual reality; Coupling-of-Modes; Surface acoustic wave; gratings; reflection coefficient;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) and 2009 China Symposium on Frequency Control Technology, Joint Conference of the 2009 Symposium on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4950-7
Type :
conf
DOI :
10.1109/SPAWDA.2009.5428923
Filename :
5428923
Link To Document :
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