2D Periodic Structure for Acoustic and Electromagnetic Radiation

The propagation of microwaves in the frequency range from 8.5 to 12GHz and acoustic radiation in the frequency range from 8.5 to 14 kHz in the same 2D periodic crystal formed by cylindrical spiral coils has been investigated. The frequency ranges in which the effective refractive index n ef of the c...

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Bibliographic Details
Published in:Physics of wave phenomena 2018-10, Vol.26 (4), p.323-326
Main Authors: Golovanov, V. I., Martynov, A. P., Shipilov, K. F.
Format: Article
Language:English
Subjects:
Acoustic propagation
Acoustics
Beams (radiation)
Coils
Collimation
Electromagnetic radiation
Frequency ranges
Microwaves
Periodic structures
Photon and Phonon Crystals
Physics
Physics and Astronomy
Quantum Optics
Refractivity
Sound waves
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Summary:The propagation of microwaves in the frequency range from 8.5 to 12GHz and acoustic radiation in the frequency range from 8.5 to 14 kHz in the same 2D periodic crystal formed by cylindrical spiral coils has been investigated. The frequency ranges in which the effective refractive index n ef of the crystal is close to zero are found. In these ranges, microwaves are collimated and concentrated in a narrow lobe with an FWHM of about 9â—¦. Focusing of divergent microwave and acoustic beams by a flat periodic structure has been observed in the frequency range where the effective refractive index of this structure is negative.
ISSN:1541-308X
1934-807X
DOI:10.3103/S1541308X1804012X