Possibilities of using a microwave cavity to measure seismic vibrations
| Autor: | E N Kozyrev, Vladislav Zaalishvili, D A Melkov |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Materials Science and Engineering. 913:052052 |
| ISSN: | 1757-899X 1757-8981 |
| DOI: | 10.1088/1757-899x/913/5/052052 |
| Popis: | The study of dangerous natural and technological processes involves their quantitative measurement. Increasing demands on seismic devices require the search for the new high-precision methods for converting mechanical vibrations. It is shown that the creation of a highly reliable broadband and simple seismic converter is possible on the basis of a high-quality microwave generator based on a volume resonator with an H01 type wave, an important parameter of which is the frequency stability of the generated vibrations. The use of H01 type wave in a volume resonator based on a circular waveguide provides a high-quality factor of the resonator (cavity). A wave of type H01 has anomalous properties. The attenuation of this wave as it moves away from the critical frequency asymptotically tends to zero with an unlimited increase in frequency due to the presence of transverse (ring) currents. Moreover, with the radius of the waveguide R = (3÷4) λ losses several orders of magnitude are lower than that of the conventional waveguides. The design features of the resonators with ring currents of the H01 wave lead to the sneak wave currents self-filtering and to work on a “clean” wave of the H01 type. In addition to small losses, the use of an H01 wave can provide several other advantages. |
| Databáze: | OpenAIRE |
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