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Millimeter Wave Generation Using Ferromagnetic Materials

Georg Ludwig HeiterStanford University. Microwave Laboratory

出版	Stanford University, 1963
URL	http://books.google.com.hk/books?id=SC4SAAAAIAAJ&hl=&source=gbs_api

註釋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).