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Showing 2 results for Metamaterials
Design of Dual-Band Double Negative Metamaterials
D. Zarifi, E. Hosseininejad, A. Abdolali,
Volume 10, Issue 2 (6-2014)
Abstract
A dual-band artificial magnetic material and then a dual-band double-negative metamaterial structure based on symmetric spiral resonators are presented. An approximate analytical model is used for the initial design of the proposed structures. The electromagnetic parameters of the proposed metamaterial structure retrieved using an advanced parameter retrieval method based on the causality principle show its dual-band nature at microwave frequencies.
A New Theorem Concerning Scattering of Electromagnetic Waves in Multilayered Metamaterial Spherical Structures
A. Abdolali, M. M Salary,
Volume 10, Issue 3 (9-2014)
Abstract
The proposed theorem in this paper is indicative of a kind of duality in the propagation of waves in the dual media of and in the spherical structures. Independent of wave frequency, the number of layers, their thickness, and the type of polarization, this theorem holds true in case of any change in any of these conditions. Theorem: Consider a plane wave incident on a multilayered spherical structure. The core of structure may be PEC, metamaterial or dielectric. If we apply the interchange or for the constituting materials of the spherical structure and the surrounding medium the radar cross section of the structure will not change in any direction.
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