wireless power transfer

Good Q, Zula. do consult Google. For what it's worth, However, surging up from my past,

Higher frequency but preferably assembly means to direct beam; for instance a reflector behind the coil. Both ends, I'd guess

Well how about it
Just kidding Zula. You'll probably haft find a suitable oscillator and a power amplifier

Let's hope we hear from Eng or other such participant much smarter than your Everyday Dimwit (me)

What's wrong with a wire? Or magnetic field if you must go wireless? My toothbrush recharger works fine wireless.

If you have to go wireless at longer distance, try microwave or optical (ie, solar power.)

Of course foot, Zul's "resonance coupling" is precisely that

The inverse square law makes wireless power transfer impractical for just about all purposes over distances greater than a few millimetres

The source does not have to be Omni-directional.
Think laser.

To the contrary Tes. Today huge amounts of power can be transmitted wirelessly for long distances, per Foot above. Doubtless we'll hear from others who are up on this sort of thing

Example please.

It has been proposed that we could capture solar energy (electrical) and relay it down to earth using microwave energy. Would make solar good 24/7 this way. No reason this would not work but some people freaked at the thought of the beam diverting from the receiving antenna array and frying anyone in its path.

Your kitchen microwave is another example but just converting to heat instead of electricity. You could easily build a simple collector to gather it as electricity.

https://www.google.com/?gws_rd=ssl#q=wireless+power+transmission