Title :
Surface-acoustic-wave phase shifter using electrical depolarisation
Author :
Gates, J.L. ; White, Richard M.
Author_Institution :
University of California, Department of Electrical Engineering & Computer Sciences, Berkeley, USA
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 :
acoustic surface wave devices; phase shifters; piezoelectric devices; acoustic surface wave devices; electrical depolarisation; phase shifters; piezoelectric devices;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19740176
