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Proceedings Paper

Nonlinear cloaking at microwave frequencies
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Paper Abstract

The ideas of employing the unique properties of metamaterials for cloaking and invisibility applications has been recently suggested and investigated by several groups, because they may find numerous applications in physics and technology. While many of the recent designs of the cloaking structures are based on the transformation optics and exact formulas, the original concept suggested by Tretyakov employed the periodical set of parallel-plate waveguides with the height smoothly varying from H to h in order to reduce drastically the total scattering cross-section of a given object and to obtain broadband cloaking effect. Our paper is devoted to improvement of this design to make tunability and nonlinear effect. The Tretyakov’s design was scaled for Ku-band frequencies and the cloak was placed into rectangular waveguide. The broad transmission band (“invisibility region”) was obtained. The tunability of transmission band was realized by addition the capacitors into the cloak, between metallic plates. The cloaking system was simulated numerically by CST Microwave Studio. The possibility of invisibility switching on/off was shown by changing of capacity of varactor diodes from 0.4 to 3.4 pF by incident power. The nonlinear cloak behavior was shown at microwaves.

Paper Details

Date Published: 15 October 2012
PDF: 6 pages
Proc. SPIE 8455, Metamaterials: Fundamentals and Applications V, 845532 (15 October 2012); doi: 10.1117/12.932370
Show Author Affiliations
E. A. Gurvitz, National Research Univ. of Information Technologies, Mechanics and Optics (Russian Federation)
E. A. Sedykh, National Research Univ. of Information Technologies, Mechanics and Optics (Russian Federation)
M. K. Khodzitskiy, National Research Univ. of Information Technologies, Mechanics and Optics (Russian Federation)


Published in SPIE Proceedings Vol. 8455:
Metamaterials: Fundamentals and Applications V
Allan D. Boardman; Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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