A low-cost device

Investor's Business Daily
November 2013
Investors Business Daily;11/13/2013, pA02
A low-cost device designed at Duke Univ. harvests microwaves from Wi-Fi signals, satellite transmissions and such. The "metamaterial" converts it to DC voltage to recharge a cellphone or other small electronic device. It works similar to a solar panel and, in tests, was 37% efficient. It could be put in paint to coat a ceiling to generate energy, or to boost the energy efficiency of appliances.


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