Acoustoelectric SAW phase shifter
- 1 November 1977
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 31 (9) , 558-560
- https://doi.org/10.1063/1.89805
Abstract
A new acoustoelectric phase shifter is proposed which produces a direct phase shift of a SAW on piezoelectric substrate. Computations of the attenuation and phase lag versus resistivity due to a silicon wafer air‐gap coupled to yz‐LiNbO3 are presented. The use of the variation of the resistivity of the silicon to control the phase of a SAW was demonstrated using the photogeneration of carriers and the field‐effect control of the surface resistivity. A 180° shift was obtained with a +30‐V transverse voltage pulse.Keywords
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