Metamaterial Particles for Electromagnetic Energy Harvesting
First Claim
1. An electromagnetic energy collecting or harvesting device comprising:
- at least one electrically small resonator to receive electromagnetic field power at a plurality of angles of incidence and converts the electromagnetic field power to AC or DC signal;
at least an ensemble of electrically small resonators arranged periodically or non-periodically on a flat plane or stacked vertically to receive electromagnetic field power at a plurality of angles of incidence and to converts the electromagnetic field power to AC or DC signal.
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Abstract
Antennas developed for electromagnetic field energy harvesting, typically referred to as rectennas, provide an alternative electromagnetic field energy harvesting means to photovoltaic cells if designed for operation in the visible frequency spectrum. Rectennas also provide energy harvesting ability or power transfer mechanism at microwave, millimeter and terahertz frequencies. However, the power harvesting efficiency of available rectennas is low because rectennas employ traditional antennas whose dimensions is typically proportional or close to the wavelength of operation. This invention provides a device for electromagnetic field energy harvesting that employs a plurality of electrically-small resonators such as split-ring resonators that provide significantly enhanced energy harvesting or energy collection efficiency while occupying smaller footprint. The invention is applicable to electromagnetic energy harvesting and to wireless power transfer.
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Citations
14 Claims
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1. An electromagnetic energy collecting or harvesting device comprising:
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at least one electrically small resonator to receive electromagnetic field power at a plurality of angles of incidence and converts the electromagnetic field power to AC or DC signal; at least an ensemble of electrically small resonators arranged periodically or non-periodically on a flat plane or stacked vertically to receive electromagnetic field power at a plurality of angles of incidence and to converts the electromagnetic field power to AC or DC signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification