Accession Number:

AD0429717

Title:

MILLIMETER WAVE GENERATION USING FERROMAGNETIC MATERIALS,

Descriptive Note:

Corporate Author:

PITTSBURGH UNIV PA

Personal Author(s):

Report Date:

1963-10-01

Pagination or Media Count:

228.0

Abstract:

Generation of millimeter waves with ferromagnetic materials by using pulsed magnetic fields as the energy source is discussed. Two specific types of generators were studied. The first of these two types had been investigated earlier. It utilized an external low microwave frequency rf magnetic field applied to a spherical yttrium iron garnet YIG sample to establish the initial precession angle in a conventional ferromagnetic resonance experiment. The objectives of the further invvestigation of this scheme were, first, to remove earlier limitations and extend the output frequency to higher ranges, and second, to give an engineering correlation between theoretical and experimental results. This has been accomplished and successful operation of this generator was obtained in the K-band range and V-band range, yielding peak pulsed powers of about 700 mW and 25 mW, respectively, with pulse widths in the order of 10 nsec in both cases. The second type generator, which uses crystalline anisotropy to achieve the initial precession angle, was originally proposed for cubic materials. In this report a more detailed quasistatic analysis of its operation is presented, together with attempts to verify the performance of this scheme experimentally. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE