Accession Number:

AD0266870

Title:

ADVANCED RADAR RESOLUTION TECHNIQUES RESEARCH ON ULTRASONIC DELAY LINES

Descriptive Note:

Corporate Author:

COLUMBIA UNIV NEW YORK ELECTRONICS RESEARCH LABS

Personal Author(s):

Report Date:

1961-07-01

Pagination or Media Count:

1.0

Abstract:

Progress on the ultrasonic delay line research task is presented. An extension of the evaporation bonding technique with indium to include the application of indium backings is described. Experimental results obtained for the bandwidth and reflection coefficient of an AC cut quartz transducer and a delay medium of fused quartz are compared to theory. The initial results obtained using lead as a bonding and backing material are described. Techniques employed to bond with lead and the initial experimental results obtained are presented, and a significant improvement over the results achieved with indium is indicated. Theoretical results indicate further improvement when the bonding techniques used for lead are refined. Results of an investigation of the diffraction effects due to a rectangular transducer are presented. An experimental apparatus used to measure diffraction effects with a dynamic range in excess of 50 db is described. Results of a series of measurements on a bonded transducer indicate the transducer vibrates with essentially constant amplitude, with minor variations due to the bonding process. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE