Wireless Charging of Mobile

With the mobile phones becoming a basic part of life, the recharging of batteries has become a big problem and with the prospect of mobile devices being equipped with additional peripheral devices like cameras, this problem worsens. As already mentioned, this paper suggests a novel method to charge the mobile phones on the move. The main principle in this proposal is to convert the incoming microwave energy to D.C through the rectenna, and use this voltage to charge the battery of the mobile.

A RECTifying anTENNA; rectifies received microwaves into DC current. A rectenna comprises of a mesh of dipoles and diodes for absorbing microwave energy from a transmitter and converting it into electric power. Its elements are usually arranged in a mesh pattern, giving it a distinct appearance from most antennae. A simple rectenna can be constructed from a schottky diode placed between antenna dipoles Rectennae are highly efficient at converting microwave energy to electricity. In laboratory environments, efficiencies above 90% have been observed with regularity.

The transmitter can be any one of the high frequency oscillators such as Klystrons, Traveling Wave Tubes, and Magnetrons. In our proposal the use of magnetron as the high frequency oscillator is explained. Magnetrons are preferred because they are highly stable.

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