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Surface acoustic wave delay lines with small temperature coefficient

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2 Author(s)

Surface acoustic wave delay lines having a vanishing first-order temperature coefficient of delay time near room temperature have been constructed. The devices were operated near 60 MHz and had about 5 µs delay. The surface waves, generated and received using interdigital electrodes, were propagated along the twofold crystallographic axis of ST-cut quartz. The phase delay change as a function of temperature has a parabolic temperature dependence with a second-order coefficient of approximately 31.5 × 10-9/° C2.

Published in:

Proceedings of the IEEE  (Volume:58 ,  Issue: 9 )

Date of Publication:

Sept. 1970

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