Accession Number : AD0671689

Title :   ELECTROACOUSTIC DELAY LINES FOR MICROWAVE FREQUENCIES,

Corporate Author : HARRY DIAMOND LABS WASHINGTON D C

Personal Author(s) : Reggia,Frank ; Mak,Ting H.

Report Date : MAR 1968

Pagination or Media Count : 40

Abstract : The paper describes techniques for the generation 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 transducers vacuum deposited on single-crystal sapphire propagating media. Typical electrical characteristics at 2 GHz of these thin-film (approximately one micron) transducers and delay media combination, in both coaxial and strip transmission lines, include delay of 6 microsec, insertion loss less than 40 dB, input VSWR less than 2.0 over a 20-percent bandwidth and operating temperature from -74 to +96C. Acoustic propagation velocity, power handling capabilities, and impedance matching techniques used with these electroacoustic delay lines are also discussed. (Author)

Descriptors :   (*DELAY LINES, MICROWAVE FREQUENCY), (*MECHANICAL WAVES, PROPAGATION), PIEZOELECTRIC EFFECT, ELECTROACOUSTIC TRANSDUCERS, CADMIUM SULFIDES, VAPOR PLATING, VACUUM APPARATUS, SINGLE CRYSTALS, SEMICONDUCTING FILMS, PERFORMANCE(ENGINEERING), MANUFACTURING, TRANSMISSION LINES

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE