Accession Number:

AD0263642

Title:

RESEARCH ON MILLIMETER FERROMAGNETIC TYPE PARAMETRIC AMPLIFIER

Descriptive Note:

Corporate Author:

WESTINGHOUSE ELECTRIC CORP BALTIMORE MD

Personal Author(s):

Report Date:

1961-07-30

Pagination or Media Count:

1.0

Abstract:

The parameters of the modified semistatic mode of amplification were optimized with respect to the pump power required for amplification. The pump power required by the parametric medium is insignificant compared with the power absorbed by the cavity for the frequency range considered. The power required by the medium decreases with frequency. The modified semistatic mode of operation was formulated for the structure which utilizes the ferrimagnetic rod electromagnetic mode resonances to concentrate the pump and signal magnetic fields. The properties of a longitudinally pumped amplifier which utilizes an antiferromagnetic parametric medium was formulated. The broad resonant line width of presently available antiferromagnetic materials suitable for microwave applications limits their use for parametric amplification. Spherical resonators of single crystalline yttrium-iron-garnet were ground and polished to a line width of 2 oersteds at a frequency of 15 kmc. The resonant line width can be measured on the Magic-Tee impedance bridge from 4 to 35 kmc. Cavities for measuring the general properties were constructed for 17, 25, and 35 kmc. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE