Accession Number:

AD0256814

Title:

GALVANOMAGNETIC AMPLIFIER INVESTIGATION

Descriptive Note:

Corporate Author:

IIT RESEARCH INST CHICAGO ILL

Personal Author(s):

Report Date:

1961-02-06

Pagination or Media Count:

1.0

Abstract:

Research was concerned with the theoretical and experimental feasibility analysis of galvanomagnetic amplifiers operating in the microwave frequency range between one and five kilomegacycles. Theoretical and experimental work was carried out in connection with basic descriptions of the phenomena involved, amplifier gain evaluation, optimization of microwave magnetic fields, and semiconductor mobility determination at microwave frequencies. The measurement of Hall mobility of indium antimonide at microwave frequencies indicated that no radical change from the DC value occurs. Although amplifiers of this type were shown to be feasible at audio frequencies this was not found to be the case in the microwave region because of difficulties in obtaining large enough magnetic fields for given power inputs. Theoretical gains, for CW operation in air filled cavities, of the order of 10 to the -8th power were obtained for both magnetoresistive and Hall amplifiers. Dielectric loading and pulsed operation brought the expected gain to 11000. This last figure was verified experimentally. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE