Accession Number : AD0739543

Title :   Advanced Concepts of Microwave Generation and Control in Solids.

Descriptive Note : Quarterly progress rept. no. 4, 1 Jul-30 Sep 71,

Corporate Author : CORNELL UNIV ITHACA N Y

Personal Author(s) : Dalman,G. C. ; Eastman,L. F. ; Lee,C. A. ; Frey,J.

Report Date : JAN 1972

Pagination or Media Count : 151

Abstract : The report deals with the progress made during the fourth quarterly period of a solid state microwave oscillator and amplifier research and development program. Discussed first is the progress on Gunn effect research. Work on the following specific topics is reviewed: frequency control studies of LSA oscillators; some harmonic properties of an LSA oscillator; LSA circuit studies; control of silicon contamination in GaAs; a varactor tuned Gunn oscillator; and Gunn effect amplifiers. The progress made on a program on avalanche devices is also described. The following specific topics are reviewed: higher average power TRAPATT considerations; GaAs Schottky barrier IMPATT diodes; nonlinearities of IMPATT reflection amplifiers with two input signals; integrated IMPATT and TRAPATT oscillators; and high-frequency high-efficiency avalanche oscillations. Studies of an experimental Pt-n-p+ punch-through-injection Ku-band diode are reported. Finally, the progress made on the studies of solid state materials for microwave devices are reported. The topics include: ion implantation and diffusion; vacuum expitaxial growth in silicon; and ionization rates in gallium arsenide. (Author)

Descriptors :   (*MICROWAVE OSCILLATORS, *SEMICONDUCTOR DIODES), MICROWAVE AMPLIFIERS, HARMONIC GENERATORS, AVALANCHE DIODES, SILICON, ION BOMBARDMENT, EPITAXIAL GROWTH, GALLIUM ARSENIDES, IONIZATION

Subject Categories : Electrical and Electronic Equipment
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE