Accession Number : AD0820683

Title :   GENERATION OF ACOUSTIC WAVES IN GALLIUM ARSENIDE BY THE GUNN EFFECT.

Descriptive Note : Technical rept.,

Corporate Author : STANFORD UNIV CA MICROWAVE LAB

Personal Author(s) : Earhart, R. D.

Report Date : JUL 1967

Pagination or Media Count : 42

Abstract : Acoustic energy generated at microwave frequencies by a Gunn oscillator diode was observed. The experimental device consisted of a gallium arsenide Gunn diode, acoustic delay line, and acoustic transducer. The maximum acoustic power observed was -45 dBm at a Gunn oscillator fundamental frequency of 470 Mc. Higher harmonics of this frequency were observed corresponding to the harmonic content of the oscillator current wave form. This phenomena is shown to be a result of piezoelectric coupling between the high field region associated with the Gunn oscillations and the gallium arsenide lattice. The acoustic waves are generated at the anode boundary of the diode as the electric field changes rapidly. (Author)

Descriptors :   *SEMICONDUCTOR DIODES), *MICROWAVE FREQUENCY), (*GALLIUM ARSENIDES, (*DELAY LINES, (*ELECTROACOUSTIC TRANSDUCERS, HARMONIC GENERATORS), PIEZOELECTRIC EFFECT, ACOUSTICS, ELECTRIC FIELDS, ELECTRICAL RESISTANCE, GAIN, VOLTAGE.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE