Accession Number : AD0767549

Title :   Surface Wave Parametric Processors and Long Delay Lines.

Descriptive Note : Final rept. 1 Mar 71-31 Mar 73,

Corporate Author : STANFORD UNIV CALIF MICROWAVE LAB

Personal Author(s) : Chodorow,M. ; Shaw,H. J. ; Kino,G. S. ; Winslow,D. K. ; Bond,W. L.

Report Date : JUL 1973

Pagination or Media Count : 75

Abstract : WHICH HAVE BEEN DEVELOPED. Section II describes thin-film waveguides for surface acoustic waves, of electric-field and slot types, having very low loss and low dispersion. They are well suited for use on wrap-around type surface wave delay lines. Section III deals with helical forms of wrap-around delay lines which provide passive, non-dispersive two-port operation. The construction of lines for one-half millisec time delays is described. Designs for larger delays are shown to be feasible, and designs for maximizing the amount of data storage per unit of delay line area are shown. Section IV is concerned with parametric signal processing, including cross correlation and pulse compression, covering terminal operating characteristics of surface wave versions of these devices operating at input frequency of 100 MHz. Substantial increase in dynamic range is described. Section V contains initial calculations and predictions with regard to incorporating extreme broadbanding techniques, as applied to interdigital transducers, into very long delay lines. (Author)

Descriptors :   (*DELAY LINES, ULTRAHIGH FREQUENCY), SEMICONDUCTING FILMS, TRANSDUCERS, WAVEGUIDES, PARAMETRIC AMPLIFIERS, BISMUTH COMPOUNDS, GERMANIUM COMPOUNDS, OXIDES, PIEZOELECTRIC CRYSTALS, LITHIUM COMPOUNDS, NIOBATES

Subject Categories : Line, Surface and Bulk Acoustic Wave Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE