Researchers of Duke University invented a device which cans
covert Microwave to Electricity. It can be use in Mobile phone for charging.
It’s work like solar panels. Solar panel convert light to Electricity
and this device converts Microwave into direct Electricity voltage. This device
can catch any kind’s wave signal.
Undergraduate engineering student Allen Hawkes, working with
graduate student Alexander Katko and lead investigator Steven Cummer, professor
of electrical and computer engineering, designed an electrical circuit capable
of harvesting microwaves.
A series of five fibreglass and copper energy conductors
wired together on a circuit board are used by them to convert microwaves into
7.3V of electricity. On the other hand the USB charger only provides 5 V.
Hawkers said that "We were aiming for the highest
energy efficiency we could achieve," and also add tha “We had been getting
energy efficiency around 6 to 10 percent, but with this design we were able to
dramatically improve energy conversion to 37 percent, which is comparable to
what is achieved in solar cells.”
“It’s possible to use this design for a lot of different
frequencies and types of energy, including vibration and sound energy
harvesting,” according to Duke graduate student Alexander Katko, one of the
inventors.“Until now, a lot of work with metamaterials has been
theoretical."
