A MICROWAVE SOURCE USING ULTRASONIC AMPLIFICATION IN PIEZOELECTRIC SEMICONDUCTORS.
Abstract
The possibility of a microwave generator utilizing acoustic amplification in a piezoelectric semiconductor is considered. Spontaneous oscillation resulting from a negative attenuation coefficient in a high overtone acoustic resonator is coupled to a load by placing the resonator in the gap of a microwave reentrant cavity. An equivalent circuit is derived for this device. Transducers are not required and a well-defined output frequency can be produced. Design procedures are given and are illustrated by the numerical design of a 3-GHz ZnO source, a 1-GHz ZnO source, and a 1-GHz CdS source. Dc power dissipation will probably limit usefulness to pulsed operation. White's theory of ultrasonic amplification in piezoelectric semiconductors is reviewed. A linear, small-signal theory is used throughout. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1968
- Accession Number
- AD0837936
Entities
People
- Andrew J. Slobodnik Jr.
Organizations
- Air Force Cambridge Research Laboratories