Accession Number : AD0774283

Title :   Acoustic Signal Processing Devices.

Descriptive Note : Semi-Annual rept. 1 May-31 Oct 73,

Corporate Author : HUGHES AIRCRAFT CO FULLERTON CALIF GROUND SYSTEMS GROUP

Personal Author(s) : Smith,W. Richard

Report Date : FEB 1974

Pagination or Media Count : 51

Abstract : ITHIUM COMPOUNDS, NiobatesAcoustic surface waves, *Interdigital transducers, Equivalent circuits, Lithium niobatesThe overall objective of this program is to expand the analysis and design of interdigital surface wave transducers. One specific goal is to better define and expand the transducer bandwidth capabilities, contrasting the cases of periodic and non periodic transducers and establishing which is preferable for a given application. A second objective is to combine the desirable features of circuit model analysis and weak coupling analyses so as to accurately describe the performance of both single and double electrodes up to at least the third harmonic, including an improved description of the effects of the electric load. This report describes our accomplishments through October 1973, which include development of broadband, non periodic transducer designs and an evaluation of the crossed-field and in-line circuit models for predicting effects of the electric load. (Author)

Descriptors :   *Acoustic delay lines, *Piezoelectric transducers, *Signal processing, Acoustic waves, Surface waves, Mathematical models, Lithium compounds, Niobates

Subject Categories : Line, Surface and Bulk Acoustic Wave Devices
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE