Super high electromechanical coupling and zero temperature coefficient surface acoustic wave substrates in KNbO/sub 3/ single crystal

1999 ◽  
Vol 46 (3) ◽  
pp. 700-705 ◽  
Author(s):  
K. Yamanouchi ◽  
H. Odagawa
Keyword(s):  
Acoustic Wave ◽  
Single Crystal ◽  
Temperature Coefficient ◽  
Surface Acoustic Wave ◽  
Electromechanical Coupling ◽  
Zero Temperature

Zero Temperature Coefficient of Frequency Surface Acoustic Wave Resonator for Narrow-Duplex-Gap Application on SiO2/Al/LiNbO3Structure

2011 ◽  
Vol 50 (7) ◽  
pp. 07HD13 ◽  
Author(s):  
Hidekazu Nakanishi ◽  
Hiroyuki Nakamura ◽  
Tetsuya Tsurunari ◽  
Joji Fujiwara ◽  
Yosuke Hamaoka ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Temperature Coefficient ◽  
Surface Acoustic Wave ◽  
Zero Temperature ◽  
Wave Resonator ◽  
Temperature Coefficient Of Frequency

scholarly journals Surface acoustic wave temperature properties in alpha-GeO2 crystal

2021 ◽  
Vol 2131 (5) ◽  
pp. 052098
Author(s):  
R M Taziev
Keyword(s):  
Wave Propagation ◽  
Surface Wave ◽  
Acoustic Wave ◽  
Temperature Coefficient ◽  
Surface Acoustic Wave ◽  
Coupling Coefficient ◽  
Electromechanical Coupling ◽  
Propagation Direction ◽  
Electromechanical Coupling Coefficient ◽  
Wave Propagation Direction

Abstract In this study, the surface acoustic wave (SAW) temperature properties in flux-grown α-GeO2 crystal are numerically investigated. It is shown that the SAW velocity temperature change substantially depends only on the temperature coefficient of three elastic constants: C66, C44 and C14 for crystal cuts and wave propagation directions, where SAW has high electromechanical coupling coefficient. The SAW temperature coefficient of delay (TCD) for these crystal cuts are in the range from -40 ppm /°C to -70 ppm /°C. In contrast to alpha-quartz, the surface wave TCD values are not equal to zero in Z-, Y- , and Z- rotated cuts of α-GeO2 single crystal. Its values are comparable in the magnitude with the surface wave TCD values in lithium tantalate. In the crystal grown from the melt, the interdigital transducer (IDT) conductance has two times larger amplitude than that in hydrothermally grown a-GeO2. The leaky acoustic wave excited by IDT on Z+120°-cut and wave propagation direction along the X-axis, has an electromechanical coupling coefficient 5 times less than that for surface wave.

Zero Temperature Coefficient Surface-Acoustic-Wave Delay Lines on AlN/Al2O3

1982 ◽  
Vol 21 (Part 2, No. 5) ◽  
pp. L303-L304 ◽  
Author(s):  
Kazuyoshi Sugai ◽  
Kazuo Tsubouchi ◽  
Nobuo Mikoshiba
Keyword(s):  
Acoustic Wave ◽  
Temperature Coefficient ◽  
Surface Acoustic Wave ◽  
Delay Lines ◽  
Zero Temperature
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