Results 221 to 230 of about 16,946 (263)
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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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A contactless surface acoustic wave biosensor
Biosensors and Bioelectronics, 1999Surface acoustic wave sensors operating in liquid generally cause problems resulting from wire bonding. The authors present an approach for a biosensor where the need for bonding wires is eliminated by utilizing inductive coupling of the sensor device to the RF circuitry.
J, Freudenberg +4 more
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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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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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A surface-acoustic-wave gyro sensor
Sensors and Actuators A: Physical, 1998Abstract This paper explains two novel methods to detect angular velocity by using a surface-acoustic-wave (SAW) device. In both methods, Coriolis forces, which act on the particles vibrating in the standing wave of a SAW, are applied. A novel gyro sensor is planned based on one of the two methods.
M. Kurosawa +3 more
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Surface acoustic wave biosensors: a review
Analytical and Bioanalytical Chemistry, 2008This review presents an overview of 20 years of worldwide development in the field of biosensors based on special types of surface acoustic wave (SAW) devices that permit the highly sensitive detection of biorelevant molecules in liquid media (such as water or aqueous buffer solutions).
Länge, K., Rapp, B. E., Rapp, M.
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Surface acoustic waves in interaction with a dislocation
Ultrasonics, 2010A surface acoustic wave can interact with dislocations that are close to the surface. We characterize this interaction and its manifestations as scattered surface acoustic waves for different orientations with respect to the surface of an edge dislocation. For dislocations that are parallel or perpendicular to the free surface, we present an analytical
Maurel, Agnès +3 more
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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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Emission of a surface acoustic wave by an internal acoustic wave propagating near the surface
Technical Physics Letters, 1998It was observed that the propagation of an internal acoustic wave near a surface is accompanied by the excitation of a surface acoustic wave directed at an angle to the internal wave.
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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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