Metamaterial electromagnetic energy harvester with near unity efficiency

We present the design of a metamaterial medium for electromagnetic energy harvesting based on the full absorption concept. A metamaterial slab was designed comprising 13 × 13 electrically small cells, each loaded with an 82 Ω resistor which mimics the input impedance of a rectification circuitry. Un...

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Bibliographic Details
Published in:Applied physics letters 2015-04, Vol.106 (15)
Main Authors: Almoneef, Thamer S., Ramahi, Omar M.
Format: Article
Language:English
Subjects:
Absorption
Applied physics
Circuits
Design
Design optimization
Energy dissipation
Energy harvesting
Input impedance
Metamaterials
Power efficiency
Substrates
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Summary:We present the design of a metamaterial medium for electromagnetic energy harvesting based on the full absorption concept. A metamaterial slab was designed comprising 13 × 13 electrically small cells, each loaded with an 82 Ω resistor which mimics the input impedance of a rectification circuitry. Unlike earlier designs of metamaterial absorbers, here the power absorption is mostly dissipated across a resistive load instead of the dielectric substrate. This implies that effective electromagnetic energy harvesting can be achieved. The power is channeled through a via connected to each cell. For a design optimized at 3 GHz, simulation and experimental results show power absorption efficiency of 97% and 93%, respectively.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4916232