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

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Acoustic Resonators
  • Amplification
  • Attenuation
  • Circuits
  • Coefficients
  • Compound Semiconductors
  • Dissipation
  • Electronics
  • Equivalent Circuits
  • Frequency
  • Generators
  • Microwaves
  • Oscillation
  • Piezoelectric Semiconductors
  • Resonators
  • Semiconductors

Fields of Study

  • Physics

Readers

  • Electrical Engineering
  • Microwave Engineering.
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems