Results 241 to 250 of about 191,841 (293)
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Nonlinear piezoelectric surface acoustic waves
The Journal of the Acoustical Society of America, 2022The theory for nonlinear surface acoustic waves in crystals developed using Hamiltonian mechanics [Hamilton, Il'inskii, and Zabolotskaya, J. Acoust. Soc. Am. 105, 639 (1999)] is modified to account for piezoelectric material properties. The derived spectral evolution equations permit analysis of nonlinear surface wave propagation along a cut surface of
John M. Cormack +3 more
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1985
In 1887 Lord Rayleigh(1) showed that a semi-infinite, isotropic, elastic medium, bounded by a single, stress-free, planar surface, can support surface vibration modes that are wavelike in directions parallel to the surface of the solid, but whose amplitudes decay exponentially with increasing distance into the solid from the surface, with a decay ...
V.A. Krasil'nikov, Krylov, Victor V.
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In 1887 Lord Rayleigh(1) showed that a semi-infinite, isotropic, elastic medium, bounded by a single, stress-free, planar surface, can support surface vibration modes that are wavelike in directions parallel to the surface of the solid, but whose amplitudes decay exponentially with increasing distance into the solid from the surface, with a decay ...
V.A. Krasil'nikov, Krylov, Victor V.
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The Journal of the Acoustical Society of America, 2007
A surface acoustic wave element includes a thin film electrode composed of monocrystal aluminum disposed on a piezoelectric substrate. At least one metal of Cu, Ta, W, and Ti is segregated in the thin film electrode composed of monocrystal aluminum. In this surface acoustic wave element, segregation of Cu or the like occurs in the thin film electrode ...
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A surface acoustic wave element includes a thin film electrode composed of monocrystal aluminum disposed on a piezoelectric substrate. At least one metal of Cu, Ta, W, and Ti is segregated in the thin film electrode composed of monocrystal aluminum. In this surface acoustic wave element, segregation of Cu or the like occurs in the thin film electrode ...
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Surface-acoustic-wave multiplexing techniques
Proceedings of the IEEE, 1975Two approaches to frequency division multiplexing using SAW devices are described. The first one uses a 9-channel filter array, where the signal combining and splitting is performed using wide-band power splitters. Two of these filter arrays were used in a data link, with data rates up to 7.5 Mbit/s for a total data rate of 67.5 Mbit/s.
H. van de Vaart, L.P. Solie
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Surface acoustic wave humidity sensor
Sensors and Actuators B: Chemical, 1993Abstract A new surface acoustic wave humidity sensor has been developed and tested. It is based on the use of a polyphenylacetylene (PPA) membrane which has already been utilized in the I 2 -doped form for the study of humidity sensors based on electrical conductivity responses. PPA shows physical properties which make it an almost ideal membrane for
C Caliendo +5 more
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Surface acoustic waves in metals
Journal of Physics C: Solid State Physics, 1984The authors present propagation experiments for surface acoustic waves (SAW) in pure single crystals of aluminium and gallium. Geometric resonances and de Haas-van Alphen oscillations are observed as sound velocity changes. In addition, a typical surface effect, a nonreciprocal effect of the SAW velocity with respect to applied field and propagation ...
J. Heil +3 more
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Surface acoustic wave MEMS gyroscope
Wave Motion, 2002zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jose, K. A. +4 more
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Surface acoustic wave microsensors.
The Journal of the Acoustical Society of America, 1996Surface acoustic waves (SAWs) excited on the surface of piezoelectric crystals form the basis of a family of microsensors that is sensitive, portable, cheap, and small. These microsensors can be used in a wide variety of applications to sense low levels of gases, physical quantities such as mass, temperature, pressure, flow and humidity, biological ...
Showko Shiokawa, Jun Kondoh
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IETE Journal of Education, 1979
The physical properties of surface acoustic waves and their use for processing radar, television and radio signals have been discussed. A brief account of surface acoustic wave devices such as delay lines, filters, oscillators and convolvers is also presented.
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The physical properties of surface acoustic waves and their use for processing radar, television and radio signals have been discussed. A brief account of surface acoustic wave devices such as delay lines, filters, oscillators and convolvers is also presented.
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2018
The amplitude of a surface acoustic wave has the maximum value A at the surface, and it attenuates exponentially as it goes inside.
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The amplitude of a surface acoustic wave has the maximum value A at the surface, and it attenuates exponentially as it goes inside.
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