DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click
HERE to register or log in.
Accession Number:
ADA010044
Title:
Compact, Broadband, Dispersive Acoustic Delay Line Module.
Corporate Author:
RAYTHEON CO WALTHAM MASS RESEARCH DIV
Report Date:
1975-02-03
Abstract:
Surface acoustic wave devices incorporating ion beam-etched reflective grating structures were designed and constructed to expand and compress a wideband, low dispersion chrip signal. Hamming weighting was incorporated in the compressor. Bandwidth was 200 MHz, dispersive time was 0.5 microsec, and center frequency was 685 MHz. A new concept called TRAC for Tilted Reflective Array Compressor was used primarily because the low dispersion would cause high insertion loss with standard designs. Special techniques to achieve the required nonuniform groove depth profile and remove the ion beam-caused surface damage layer were developed. Although most performance requirements of the devices were met, the best case sidelobe suppression was predicted to be only about 24 dB instead of the goal of 40 dB.
Descriptive Note:
Final rept. 1 Jul 73-31 Dec 74,
Pages:
0107
Contract Number:
F19628-73-C-0277
File Size:
0.00MB
