Pulse-switchable microwave resonator on a basis of monocrystal hexaferrite

Andriy M. Sorochak; Viktor I. Kostenko; T. G. Chamor; Leonid V. Chevnyuk

doi:10.3103/S0735272711080024

Authors

Andriy M. Sorochak Taras Shevchenko National University of Kyiv, Ukraine
Viktor I. Kostenko Taras Shevchenko National University of Kyiv, Ukraine
T. G. Chamor Taras Shevchenko National University of Kyiv, Ukraine
Leonid V. Chevnyuk Taras Shevchenko National University of Kyiv, Ukraine

DOI:

https://doi.org/10.3103/S0735272711080024

Keywords:

monocrystal hexaferrite, ferromagnetic resonance, high-frequency hysteresis, frequency-field dependence, pulse-switching

Abstract

In this paper it is considered an idea of application specificities of hysteresis loop of frequency-field dependence of ferromagnetic resonance of good monocrystal hexaferrite materials for creation of pulse-switchable resonator for millimeter wavelength range. The essence of principle of this device lies in possibility of quick change of the hexaferrite resonator frequency from higher frequencies to lower and inversly, "switching" the hexaferrite onto definite magnetic states. The idea was realized in a prototype device with resonator from barium hexaferrite BaFe₁₂O₁₉. It is stated experimentally that maximal tuning range can achieve 3.5 GHz, and the time for tuning is about 200 µs in case of magnetic field pulse is about 1.5 kOe.

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