Accession Number:

AD0671689

Title:

ELECTROACOUSTIC DELAY LINES FOR MICROWAVE FREQUENCIES,

Descriptive Note:

Corporate Author:

HARRY DIAMOND LABS WASHINGTON D C

Personal Author(s):

• Reggia,Frank
• Mak,Ting H.

Report Date:

1968-03-01

Pagination or Media Count:

40.0

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