Accession Number : AD0769866

Title :   Microwave Acoustic and Bulk Device Technique Studies.

Descriptive Note : Interim technical rept. no. 6, 1 Nov 72-30 Apr 73,

Corporate Author : STANFORD UNIV CALIF MICROWAVE LAB

Personal Author(s) : Chodorow,Marvin ; Shaw,H. J.

Report Date : AUG 1973

Pagination or Media Count : 52

Abstract : TIME, Lithium compounds, Zinc compounds, Niobates, Oxides*Microwave acoustics, *Acoustic surface waves, Piezoelectric semiconductors, Lithium niobates, Zinc oxidesMajor improvements are reported on a bulk wave device for parametric convolution/correlation, time reversal and real-time Fourier transformations of arbitrary signals. A wideband waveguide output circuit has permitted an increase by a factor of 5 in the bandwidth for convolution, resulting in demonstration of pulse compression with a time-bandwidth product of 875 and an output pulse of 4 nanosecond width. Work is described on new approaches to parametric convolution/correlation and matched filtering, using various acoustic wave types in piezoelectric semiconductors, which have prospects for incorporation into integrated circuits. New procedures and diagnostic techniques have been applied to the deposition of piezoelectric films for excitation of surface acoustic waves on nonpiezoelectric substrates, with potential for improved delay line properties and incorporation into integrated circuits. (Modified author abstract)

Descriptors :   (*Semiconductor devices, Ultrasonic radiation), (*Delay lines, Surface waves), Fourier transformation, Signal processing, Gallium arsenides, Piezoelectric materials, Real time, Lithium compounds, Zinc compounds, Niobates, Oxides

Subject Categories : Line, Surface and Bulk Acoustic Wave Devices
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE