THE SURFACE WAVE EFFECT AND ITS APPLICATION IN FILTERS AND ULTRASONIC DELAY LINES,

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TRANKLE E
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| 1970年 / 09期
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The surface-wave principle appears suitable to expand the range of application of piezoelectric vibrators to higher frequencies. For a surface wave the particle displacements rapidly decrease with growing distance from the surface. The waves are excited by interdigital transducers on a piezoelectric substrate which may consist of one of the following materials-- piezoelectric ceramics, quartz, cadmium sulphide or telluride and (especially for microwave frequencies) lithium columbate. Data on filters and ultrasonic delay lines designed on the surface-wave principle are given.
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页码：436 / 439
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