Accession Number:

ADA056809

Title:

Modal Analysis of SAW Convolver

Descriptive Note:

Technical rept.

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

• Wang, Karl L.

Report Date:

1978-01-13

Pagination or Media Count:

40.0

Abstract:

The gap-coupled acoustoelectric convolver developed at Lincoln Laboratory is a surface-acoustic-wave SAW device consisting of a LiNbO3 delay line and a silicon strip supported on a series of spacer rails or posts which have been ion-beam etched into the LiNbO3 surface. The siliconair-gapLiNbO3 structure forms an over-moded acoustic waveguide. A theoretical model has been developed which analyzes the perturbing effect of rails and predicts the mode structure and beating phenomena between modes. The scattering by support posts is also analyzed.

Descriptors:

• *ACOUSTIC WAVES
• *DELAY LINES
• *ELECTROACOUSTIC MATERIALS
• *SEMICONDUCTORS
• *SURFACE WAVES
• ETCHING
• SILICON
• WAVEGUIDES

Subject Categories:

• Line, Surface and Bulk Acoustic Wave Devices
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE