Microwave Acoustic Device Research at Standard Telecommunications Laboratories,
Abstract
Simultaneous measurements have been made of electric field and acoustic flux distributions in propagating domains in CdS crystals. Electric field measurements used a standard probe, while acoustic intensity measurements were made with a laser probe utilizing Brillouin scattering. Acoustic frequencies in the range between approximately 2.5 GhZ and approximately 0.3 GhZ could be covered. It was found that substantial acoustic flux exists at frequencies far below the maximum small-signal gain frequency, and that there were substantial differences in the spatial distributions of electric and acoustic fields. Measurements are continuing to cover wider parameter ranges. Microwave two-port fixed acoustic delay lines have been developed for use in calibration of STC C-band FM radio altimeters. Acoustic delay lines are very well suited to this application, as delay, bandwidth, and insertion loss requirements are well within the range of such delay lines. Scaling of these delay lines for X-band radar application is being undertaken. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 13, 1969
- Accession Number
- AD0853983
Entities
People
- H. J. Shaw
Organizations
- Office of Naval Research