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We propose the use of tightly coupled antennas as an efficient electromagnetic energy harvester. Different from conventional rectenna systems the antennas are placed close to each other providing high capacitive coupling. This coupling along with the backed ground plane is utilized to produce a surface impedance matched to the free space impedance, thus full absorption is achieved. In addition, the...
In this paper, we present a new approach to realizing full-wave rectification for Electromagnetic energy harvesting. The proposed rectenna structure consists of a full-wave rectifier that is differentially fed by two separate antennas. The resulting configuration allows the received power to be rectified and transferred into a DC load between two antennas, making it very easy to channel the harvested...
We present the design and concept of 3-dimensional (3-D) electromagnetic energy collection for microwave energy harvesting. We show that by vertically stacking panels of electromagnetic energy collectors, the power collected experiences a significant enhancement over a single 2-D panel. Here, we present an example of the power harvested by a 3-D 4 × 4 × 4 folded dipole antenna arrays compared to a...
Split Ring Resonators can be densely stacked to form energy harvesting systems arrays having per area efficiency higher than a single SRR unit cell. Although the concept of utilizing SRRs for electromagnetic energy was presented in our earlier work, the per area efficiency of an SRR array as compared to that of existing collectors (classical antennas) is fundamental to the viability of this technology...
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...
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