Generation and Propagation of Hypersonic Waves and Their Applications to Microwave Frequencies.
Abstract
The paper describes techniques for the generation, amplification, and propagation of elastic waves in the frequency range 1 to 3 GHz. These techniques include the design, fabrication, and evaluation of microwave acoustic delay lines consisting of highly oriented electroacoustic CdS and ZnO transducers vacuum-deposited on single-crystal sapphire (Al2O3) propagating media. Typical electrical characteristics at 2 GHz of these thin-film transducers (about 1 micrometer thick) and delay media combination, in both 6 microsec, insertion loss less than 40 dB, input VSWR less than 2.0 over a 20-percent bandwidth, and operating temperature from -74 degrees to +96 degrees C. These fixed, passive microwave acoustic delay lines (MADL) are very reliable and are small, lightweight, and relatively inexpensive to fabricate. Acoustic propagation velocity, power handling capabilities, impedance matching techniques, and applications of these electroacoustic delay lines are also discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1971
- Accession Number
- AD0725995
Entities
People
- Frank Reggia
Organizations
- Harry Diamond Laboratories