Surface-acoustic-wave phase shifter using electrical depolarisation
- 30 May 1974
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 10 (11) , 231-232
- https://doi.org/10.1049/el:19740176
Abstract
An electrically variable phase shifter employing surface acoustic waves is described that uses electrical depolarisation of a poled PZT ceramic. Phase shifting occurs in a depoling region in which an electric field of variable strength opposes the remanent ferroelectric moment, causing a change in the piezoelectric coupling and surface-wave velocity.Keywords
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