Most of us have already experienced the wireless technology. The best example of this technology would be the radio or the mobile phone. Like the radio station transmits the songs in the form of radio waves and the receiver decodes it before we listen to the song. In other words i can say that the power is transmitted from one end without wires in the form of radio waves using electromagnetic radiation and the other end receives this signal, decodes it and uses it.
So why cant we use this technology for charging the cellphone or an ipod?
Answer is simple – During transmission the radiation spreads in all the direction wasting the majority of the power in the free space.
So what would be the best solution for charging the gadgets wirelessly? Magnetic Coupled Resonator would be the solution. It means there will be two magnetic coils with closely matching resonant frequency (fine tuned) which can couple (connect) strongly in a magnetic field.