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Can you use microwave transmitters and recievers to wirelessly transfer energy? Can it replace copper cables. Answered

2nd wireless energy transfer question.

Please note: The 1st question which contains more background opens up the topic of using lasers as conductors of electricity, found here




8 years ago

I have doubts that there is any frequency for high power wireless BEAMS of energy, because to the best of my knowledge, NO high powered energy beam is SAFER THAN A BEAM OF X-RAYS of the same power. After all, consider a 1 kilowatt laser beam. To be safe, the power of the microwave beam must either bounce off of you nearly 100% as if you were as shiny as chrome, or go through you as if you were as clear as crystal, or else your body will absorb that energy and be quickly toasted. But there is enough wireless power in the air already to do some cool things that look like perpetual motion machines; you can light up an LED, listen to a crystal radio without batteries, make a radio-powered motor, run a watch, clock, or solar calculator, perhaps even make a self-charging palm pilot, or anything else that runs on a small solar cell or watch battery. The greatest wireless power band is 50-60Hz, and it's only really illegal to receive power if you blatantly leave huge reckless coils under power lines just to brag about one lamp that lights up for free forever. The recycling of wasted power will go entirely unnoticed if you can build 50-60Hz fine tuned crystal radios or something similar inconspicuously maybe as part of a "perpetual motion machine" curiosity, as most people will never think of something powered by the same radiation source as the buzzing noise that their electric guitar picks up when they plug it in. I can imagine using a world wide network of golden sun-tracking mirrors to beam daylight from the tropical deserts to the dark cold places, except that would block out the stars and be called "light pollution". And if the mirrors reflected light from the sun to earth IN SPACE, that would be "global warming". I wonder ... Would solar powered air conditioners be heat sources or heat sinks?


9 years ago

Sorry for the lack of info. This is the most comprehensive overview I could offer you: http://en.wikipedia.org/wiki/Wireless_energy_transfer My purpose in spreading the query was to have a much larger base of people try to answer.

Basically, all I can jive at is that there is no commercial product that can efficiently transmit wireless energy in far distances.

You could transmit energy between countries, and energy costs could drop drastically if we could beam it, especially if its cheaper to produce energy from country A to B.

Just a hunch.

Have you tried researching this yourself? Journal articles are probably more likely to have accurate information than random do-it-yourselfers. Start with Google Scholar, and try Wikipedia for basic information if the articles are too specialized.

You can, but is it any better than copper?
Have you something specific in mind or has steve' given you the best answer?


I don't think microwaves are too good for your grey matter...

Microwaves are only bad for you at certain frequencies. Those that make water molecules resonate.

Its been proposed, for solar satellite downlinks (and transmitted in wavebands which are inside any lossy water absorption effects) It really isn't worth doing except on a VERY large scale, to make the energy transmission density at ground level safe enough to live in, or at least survive exposure to !