Accession Number : ADD003895

Title :   Electronically Variable Surface Acoustic Wave Phase Shifter.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Davis,Kenneth L

Report Date : 25 Jan 1977

Pagination or Media Count : 3

Abstract : An electrically variable surface acoustic wave phase shifter including a substrate upon which a piezoelectric layer is deposited and separated therefrom by an insulating layer. An electrode is deposited on the piezoelectric layer and on the bottom of the substrate with an electrical dc bias applied onto the electrodes which causes a charge accumulation or a depletion region at the silicon surface. This charge accumulation or depletion region causes the boundary conditions to change therefore causing a phase change in an acoustical wave propagating along the layered silicon surface. (Author)

Descriptors :   *Patents, *Phase shift circuits, *Acoustic waves, *Surface waves, Variations, Phase control devices, Electrodes, Bias, Substrates, Silicon, Propagation

Subject Categories : Line, Surface and Bulk Acoustic Wave Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE