Folded Path Surface Wave Delay Line.
Abstract
This development has resulted in a 100-microsecond folded path acoustic surface wave delay line with a bandwidth greater than 50 MHz centered at 150 MHz. The total package, which includes gain to offset the insertion loss, weighs less than 10 ounces. The operating line has a dynamic range greater than 40 dB and the delay varies less than + or - 0.6 percent over the temperature range (-50 to +70 degrees C). The delay is achieved by propagating the surface waves around the ends and on both the front and back surfaces of the Lithium Niobate substrate. Various materials, polishing and grinding techniques, and transducer configurations were evaluated to establish this design. A second technique for realizing folded path acoustic surface wave operation on one surface of the substrate has also been evaluated. This technique, which uses unconnected conductor lines deposited on the surface to fold the surface wave beam, operates over wide bandwidths and holds much promise for future applications. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1972
- Accession Number
- AD0904717
Entities
People
- Bill J. Hunsinger
- Fred Y. Cho