SURFACE WAVE DEVICES.
Abstract
An important aspect of any program for the study of surface waves is calculation of the phase and group velocities and the elastic and electric field patterns. Surface wave propagation has been under investigation both theoretically and experimentally for several substrate materials. A formalism was developed to calculate surface wave phase and group velocities for different crystal symmetries. Of particular interest is the character of the roots of the wave equation for the various regions of 'slowness' space. Convergence of the real and the imaginary parts of the determinant formed from the boundary conditions has been investigated. Of particular interest are the calculations for one new material, Ba2NaNb5O15. Velocity measurements have been made for elastic waves at the surface of CdS, ZnO, LiNbO3, GaAs, Si, and Ba2NaNb5O15. Limited measurements of attenuation have also been made. The spreading of a surface wave beam has been treated in both near and far field regions. The prototype correlation and compression filter studies are discussed. A mathematical model has been formulated for the response of a dispersive surface wave transducer array. Application areas for surface wave matched filters for radar signal processing have been identified.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1970
- Accession Number
- AD0702776
Entities
People
- Clinton S. Hartmann
- Lewis T. Claiborne
- W. Stanley Jones
Organizations
- Texas Instruments