Optimum filtration of microwave signals by a multiband spin-wave ring resonator |
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Authors: | A. A. Porokhnyuk A. B. Ustinov N. G. Kovshikov B. A. Kalinikos |
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Affiliation: | 1. St. Petersburg State Electrotechnical University, St. Petersburg, 197376, Russia
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Abstract: | The optimum filtration of pulsed microwave signals by a multiband active spin-wave ring resonator has been studied for the first time. The ring resonator, which comprises a spin-wave delay line based on a ferromagnetic single crystal film of yttrium iron garnet with a microwave amplifier in the feedback chain, possesses a comblike amplitude-frequency characteristic with a large number of pass bands. It is established that the best filtration of a periodic train of rectangular microwave pulses is achieved provided that harmonics of the signal coincide with the positions of the resonator pass bands. Thus, an active spin-wave ring resonator can be used as the optimum filter for periodic pulsed microwave signals. |
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