Results 171 to 180 of about 54,841 (212)
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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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New Materials for Surface Acoustic Wave (SAW) Devices
Optical Engineering, 1977Advances in state-of-the-art of surface acoustic wave (SAW) device technology will require better substrate materials than those currently available. Calculations of the surface acoustic wave properties of several materials including the quartz derivatives berlinite (A1PO4 ) and 0-eucryptite (0-Li Al SiO4), certain sulfosalts, and a composite structure,
Robert M. O'Connell, Paul H. Carr
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Surface acoustic waves and SAW materials
Proceedings of the IEEE, 1976Material parameters necessary for optimum design of surface-acoustic-wave (SAW) devices are reviewed. Velocity, coupling coefficient, power flow angle, temperature coefficients, propagation loss (including air loading, diffraction, and beam steering), and equivalent circuit parameters are considered.
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Precision Surface Acoustic Wave (SAW) Oscillators
1982 Ultrasonics Symposium, 1982SAW delay lines and resonators are now used in a number of oscillator applications where high frequency and/or low noise are important considerations. All present applications, however, have a large frequency window which permits very loose tolerances on frequency settability and long term stability.
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Surface Acoustic Wave (SAW) vapour sensor using 70 MHz SAW oscillator
2012 Sixth International Conference on Sensing Technology (ICST), 2012Surface Acoustic Wave (SAW) based device is very much suitable for detecting very small quantity of vapours of explosive chemicals. There are three possible kinds of SAW devices which can be used for sensor fabrication such as delay lines, resonator and filter. Choice among them depends on individual preferences and sometimes it is the matter of chance.
T. Islam +3 more
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Three wave surface acoustical wave (saw) signal processor
The Journal of the Acoustical Society of America, 1986A surface acoustic wave processor capable of performing convolution, correlation, time expansion/compression, and time reversal utilizes the nonlinear interaction between two input surface waves to generate a third surface wave. Phase matching for the third surface wave to perform an integration function is provided by a fan multistrip coupler (FMSC ...
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Covalent bound sensing layers on surface acoustic wave (SAW) biosensors
Biosensors and Bioelectronics, 2001This paper reports on the development of immunosensors based on commercially available surface acoustic wave (SAW) devices working at 380 MHz. Approaches for coating the sensor surface with a sensing layer of receptive biomolecules are presented and discussed. It was found that the sensitivity strongly relates to the immobilization method. Additionally,
Barie, N., Rapp, M.
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Monolithic Thin Film SAW (Surface Acoustic Wave) Structures.
1984Abstract : A new storage correlator is presented. The characteristics are long storage and ease of fabrication. Very large Q values for SAW (on-silicon) resonators are reported. New device concepts involving A1GaAs-GaAs double heterostructures are proposed. (Author)
R. F. Pierret, S. Datta, R. L. Gunshor
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Surface Acoustic Wave (SAW) Controlled Oscillators (Panel Discussion)
1978 IEEE-MTT-S International Microwave Symposium Digest, 1978The surface acoustic wave (SAW) controlled oscillator consists of a narrow band SAW delay line or resonator used as a feedback element, an amplifier with sufficient gain to overcome the insertion loss of the SAW device, and a means to couple out part of the signal.
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Nonreciprocity in acoustic and elastic materials
Nature Reviews Materials, 2020Hussein Nassar +2 more
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