Pneumatically switchable graded index metamaterial lens
Date
2013-01-15
Authors
Khodasevych, I. E.
Shadrivov, I. V.
Powell, D. A.
Rowe, W. S. T.
Mitchell, A.
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Volume Title
Publisher
American Institute of Physics
Abstract
A low-profile pneumatically switchable graded index metamaterial lens operating at 9 GHz is proposed and practically demonstrated. An effective graded refractive index is engineered using an array of electric resonators of differing resonant frequency. Normal orientation of the resonators allows ultrathin single metamaterial layer lens design. Switching between focusing and non-focusing states is practically demonstrated by shorting the gaps in split ring resonators and eliminating the resonant response and the phase difference between the elements across the lens with pneumatically actuated metal patches that are pressed against the gaps of the resonators as the pressure in the chamber is reduced.
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Keywords
Keywords: Graded index; Graded refractive indices; Lens designs; Metal patch; Metamaterial lens; Normal orientation; Phase difference; Resonant response; Split ring resonator; Switchable; Ultra-thin; Metamaterial antennas; Metamaterials; Natural frequencies; Resona
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Source
Applied Physics Letters
Type
Journal article
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