Results 191 to 200 of about 189,846 (243)
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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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Nonlinear surface acoustic waves: Theory
Ultrasonics, 2008A theoretical description is given for the propagation of surface acoustic wave pulses in anisotropic elastic media subject to the influence of nonlinearity. On the basis of nonlinear elasticity theory, an evolution equation is presented for the surface slope or the longitudinal surface velocity associated with an acoustic pulse.
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Surface Acoustic Wave Microfluidics
Annual Review of Fluid Mechanics, 2014Fluid manipulations at the microscale and beyond are powerfully enabled through the use of 10–1,000-MHz acoustic waves. A superior alternative in many cases to other microfluidic actuation techniques, such high-frequency acoustics is almost universally produced by surface acoustic wave devices that employ electromechanical transduction in wafer-scale ...
Leslie Y. Yeo, James R. Friend
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Surface acoustic wave filter, surface acoustic wave device and communication device
The Journal of the Acoustical Society of America, 2007A longitudinally coupled resonator type surface acoustic filter includes a rotated Y-cut X-propagating LiTaO 3 substrate. The gap length G in the IDT electrode of the surface acoustic wave resonator is about 0.3 times the wavelength λ of the surface acoustic wave or less.
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