Variable Acoustic Surface Wave Correlator.
Abstract
The report describes an experimental and theoretical study of nonlinear tapped delay lines for use in electronically variable, radar chirp signal correlation. The devices consist of a hybrid configuration employing a piezoelectric surface acoustic wave delay line whose P equi-spaced taps are wire bonded to an attached, integrated circuit, semiconductor diode array. The device performs as a high speed, real time convolver by use on nonlinear mixing in the diode array. The design, fabrication and test of 51 and 300 tap devices are described which use lithium niobate delay lines and silicon-on-sapphire diode arrays. These devices operate with signal and reference inputs near 120 and 180 MHz. In order to achieve a chirp signal processing bandwidth near 30 MHz, these devices used an unusually small tap spacing, 0.005 inch. A complete theory for the devices is developed and is compared with experimental results for convolution and chirp signal correlation operation with input signals with up to 30 MHz bandwidth.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1974
- Accession Number
- ADA002560
Entities
People
- J. L. Swindal
- T. M. Reeder