Propagation and Amplification of Rayleigh Waves and Piezoelectric Leaky Surface Waves in LiNbO3

Yamanouchi, Kaoru; Shibayama, Kimio

doi:10.1063/1.1661294

Cited by 229 publications

(90 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A 41 • YX LiNbO 3 piezoelectric substrate was used because of its high SAW propagation velocity (4792.2 m/s) and large electromechanical coupling factors K 2 (17.2%) [6]. High SAW velocity provides easy device patterning in fabrication.…”

Section: Com Simulation and Discussionmentioning

confidence: 99%

Optimal design on SAW sensor for wireless pressure measurement based on reflective delay line

Wang

Lee

Woo

et al. 2007

Sensors and Actuators A: Physical

View full text Add to dashboard Cite

Section: Com Simulation and Discussionmentioning

confidence: 99%

Optimal design on SAW sensor for wireless pressure measurement based on reflective delay line

Wang

Lee

Woo

et al. 2007

Sensors and Actuators A: Physical

View full text Add to dashboard Cite

“…The equivalent acoustic velocity (frequency u O 0 ) is 6141 m/s at resonance and 6431 m/s at antiresonance. These values are 1.4 times those in an LSAW with 64° rotation Y-cut X-propagation LN (64°YX-LN) [25]. Here, the electromechanical coupling coefficient (k 2 ) is computed from the equation below, which gives the definition in the longitudinal effect piezoelectric transducer in terms of the acoustic velocity at resonance (V r ) and that at antiresonance (V a ) [26]:…”

Section: Llsaw With High Acoustic Velocitymentioning

confidence: 99%

Investigation of new‐mode‐type SAWs by procedures combined with finite‐element and analytical method, and their applications for devices used in mobile communications

Isobe

Hikita

Asai

et al. 2001

Electron Comm Jpn Pt II

View full text Add to dashboard Cite

SUMMARYSimulations using a combination of the finite-element method and the analytical method as well as experiments are used to study new-mode-type SAWs. First, in 171°YZc-LiNbO 3 , it is found that there exists a longitudinal leaky SAW with a high acoustic velocity and a high Q in a grating structure with an Al film thickness of 0.084 wavelength. The acoustic velocity is 6100 to 6500 m/s and the Q values are more than 4000 (computed) at both the resonance and antiresonance points. These excellent properties are suitable for high-frequency SAW devices. Next, in 15°YX-LiNbO 3 , it is found that there exists a grating mode SAW of a transverse wave type in a grating structure with an Al film thickness of 0.125 wavelength. In this case, k 2 has an extremely large value of 28.5% and hence the mode is suitable for a SAW resonator for use in a voltage-controlled oscillator. By means of this SAW, SAW-VCOs at 400 and 170 MHz for mobile communication are fabricated. At 400 MHz, the frequency variable width is 54 MHz (3.2%/V) and the phase noise is less than 115 dBc/Hz at 25 kHz; the corresponding values at 170 MHz are 24 MHz (3.4%/V) and < 12 dBc/Hz at 25 kHz. © 2001 Scripta Technica, Electron Comm Jpn Pt 2, 84(4): 4958, 2001

show abstract

“…Because of this property, the cut of the substrate with a smaller leakage loss is used in the LSAW device. 2,3 There is a cut with zero temperature coefficient as well as a cut with a large K 2 . The problem with these cuts, however, is that the leakage loss is large.…”

Section: Introductionmentioning

confidence: 98%

Suppression of bulk wave radiation from leaky surface acoustic waves by loading with thin dielectric films

Kakio

Hishinuma

Nakagawa

2000

Journal of Applied Physics

View full text Add to dashboard Cite

The bulk wave, which is radiated into the substrate from the leaky surface acoustic wave (LSAW), can be suppressed by loading the substrate with a thin film of dielectric such as tantalum pentoxide (Ta2O5) and silicon dioxide (SiO2). Rotated Y-cut X-propagating lithium niobate (LiNbO3) is used for the substrate. For a certain range of the rotation angle, the attenuation of the LSAW can be suppressed by choosing the appropriate material and thickness for the film. For the free surface of 64° Y−X LiNbO3 with Ta2O5 film, and the metallized surface of 41° Y−X LiNbO3 with SiO2 film, the measured propagation losses decreased approximately to one-fourth to half of that of the sample without the thin film. It is shown that, even if the propagation path is a free surface, the particle displacement distribution in the LSAW is concentrated near the substrate surface by the loading with the thin film, as for the metallized surface. This result suggests that the bulk wave radiation in the LSAW excitation can be suppressed. The bulk wave radiation loss for the 41° Y−X LiNbO3 with the Ta2O5 film decreased approximately to one-sixth of that of the sample without the thin film.

show abstract

Propagation and Amplification of Rayleigh Waves and Piezoelectric Leaky Surface Waves in LiNbO3

Cited by 229 publications

References 8 publications

Optimal design on SAW sensor for wireless pressure measurement based on reflective delay line

Optimal design on SAW sensor for wireless pressure measurement based on reflective delay line

Investigation of new‐mode‐type SAWs by procedures combined with finite‐element and analytical method, and their applications for devices used in mobile communications

Suppression of bulk wave radiation from leaky surface acoustic waves by loading with thin dielectric films

Contact Info

Product

Resources

About