Accession Number : AD0708865

Title :   ANALYSIS AND APPLICATION OF GALLIUM ARSENIDE AVALANCHE TRANSIT TIME DEVICES.

Descriptive Note : Research and development technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Baranowski,Joseph J. ; Higgins,Vincent J.

Report Date : MAY 1970

Pagination or Media Count : 31

Abstract : The report describes a unique theoretical design which has advanced the performance of avalanche transit time diodes for the direct generation of coherent microwave energy. A rigorous computer aided analysis is presented which solves the continuity equations and Poisson's equation for an avalanching electron hole plasma. The theoretical characterization of these devices with respect to AC impedance and noise performance is obtained and has led to internally designed and fabricated gallium arsenide avalanche transit time oscillators and amplifiers. The microwave performance characteristics of these devices have set the state-of-the-art in terms of DC to rf efficiency and amplifier noise figure and has resulted in component application for military systems. Gallium arsenide devices are presently being tested and evaluated in several Army systems. These systems include a Ku-band local oscillator for a portable battlefield radar; an X-band transmitter for a digital communications system; a Ku-band velocity sensor for air cushion vehicles; a pump for a traveling wave tube in a classified coherent doppler system. Details of the results of these tests are discussed along with several other proposed Army applications. (Author)

Descriptors :   (*MICROWAVE OSCILLATORS, *GALLIUM ARSENIDES), (*MICROWAVE AMPLIFIERS, SEMICONDUCTOR DIODES), AVALANCHE DIODES, COHERENT RADIATION, K BAND, X BAND

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE