Metamaterial Particles for Electromagnetic Energy Harvesting

Applied Physics Letters (Impact Factor: 3.3). 10/2012; 101(17):173903. DOI: 10.1063/1.4764054


Metamaterials are typically made of an ensemble of electrically small resonators such as metallic loops. The fact that such particles resonate individually to generate a bulk material behavior having enhanced constitutive parameters is essentially indicative of these particles' ability to collect energy. We show that such particles act as energy collectors when a resistive load is inserted within the particle's gap. A proof of concept is provided using a 5.8 GHz field and a split-ring resonator (SRR) as the electromagnetic energy collecting cell. Numerical simulation for a 9 × 9 SRR array shows the effectiveness of an SRR array as an energy collector plate.

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    ABSTRACT: A novel electromagnetic energy harvester based on Split Ring Resonators (SRR) is presented. The resonance phenomenon of SRR cells is indicative of their ability to trap electromagnetic energy from an incoming wave. This paper shows that an SRR cell can potentially be used to harvest electromagnetic energy by placing a resistive load across the gap of the resonator. To prove the concept, a prototype of a loaded single loop SRR resonating at 5.8 GHz is simulated, fabricated and tested. We show through numerical simulations that an SRR array can harvest electromagnetic energy effectively across wide range of incident angles.
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