Wide-Band Monolithic Acoustoelectric Memory Correlators.
Abstract
Significant applications in radar and communication systems exist for memory correlators. These analog surface acoustic wave (SAW) devices are capable of storing one wide-band signal and then, some time later, correlating with it another wide-band signal. For some applications, these devices must be capable of handling signals with instantaneous bandwidths approaching 200 MHz. Several device types are being investigated in the surface acoustic wave memory-correlator research. Of these, the most extensively reported are the Si-LiNbO3 and GaAs-LiNbO3 gap-coupled types, and the ZnO-Si, ZnO-GaAs, and GaAs monolithic types. Moderate-bandwidth (60-MHz) memory correlators have been demonstrated in the LiNbO3 devices and narrow-band width (30-MHZ) memory correlators in the ZnO devices. The purpose of this paper is to discuss the several types of monolithic memory correlators and to determine the realistic time-bandwidth limitations of each. Finally, the device design most appropriate for wide-band applications is discussed. Keywords include: Memory correlators, Wide-band signals, and Acoustic Attenuation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1982
- Accession Number
- ADA154255
Entities
People
- P. V. Wright
- R. A. Becker
- R. W. Ralston
Organizations
- Massachusetts Institute of Technology