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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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Surface acoustic wave device, surface acoustic wave apparatus, and communications equipment
The Journal of the Acoustical Society of America, 2008A second substrate 21 composed of a material having a lower dielectric constant than that of a piezoelectric substrate 2 having a transmission-side filter region 12 and a receiving-side filter region 13 formed therein is joined to the other main surface of the piezoelectric substrate 2, and a conductor layer 22 is formed throughout the other main ...
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Surface Acoustic Wave (SAW) Filters
2007Lumped components such as resistors, capacitors, and inductors make up most of the glue that allows microwave discrete transistors and integrated circuits to work. Lumped components provide impedance matching, attenuation, filtering, DC bypassing, and DC blocking. More advanced lumped components such as chokes, baluns, directional couplers, resonators,
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The Journal of the Acoustical Society of America, 2008
A surface acoustic wave device that can operate in alternate-phase mode and single-phase mode, and thus generate surface acoustic waves at two different frequencies. The device is based on a piezoelectric film deposited on an elastic substrate, and includes an electrode layer patterned as two interdigital electrodes and electrical source (2).
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A surface acoustic wave device that can operate in alternate-phase mode and single-phase mode, and thus generate surface acoustic waves at two different frequencies. The device is based on a piezoelectric film deposited on an elastic substrate, and includes an electrode layer patterned as two interdigital electrodes and electrical source (2).
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Nonlinear surface acoustic waves
AIP Conference Proceedings, 2000A comprehensive theory based on Hamiltonian mechanics has been developed for a wide variety of nonlinear surface acoustic waves. The present paper reviews evolution equations and physical insight resulting from this body of work.
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Bulk Acoustic and Surface Acoustic Waves
2000This chapter describes the excitation, detection and propagation of acoustic waves, including SAWs in various propagation media. Although I have tried to explain their physics as simple as possible, the content may seem difficult for readers who have dealt with SAW devices as an electronic element.
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The Journal of the Acoustical Society of America, 2008
A surface acoustic wave element includes a pair of interdigital transducers arranged in parallel with a propagation direction of a surface acoustic wave; a reflector prepared at both sides of the interdigital transducers; and a coupling portion, which mutually couples one end of a plurality of electrode fingers constituting one electrode portion of ...
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A surface acoustic wave element includes a pair of interdigital transducers arranged in parallel with a propagation direction of a surface acoustic wave; a reflector prepared at both sides of the interdigital transducers; and a coupling portion, which mutually couples one end of a plurality of electrode fingers constituting one electrode portion of ...
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