I'm building a circuit that uses a really low voltage and current. I thought that instead of using a standard battery it would be nice if I could use a rechargeable battery and charge it with electromagntic waves (2100MHz or 850MHz). I may use a LC circuit and set it to the right resonant frequency. If I set it to 2100MHz I will need:
1pF and 0.0057438 MicroHenrys
That may work, but how will it be possible? If I used 100MHz it might work but I don't know how efficient it will be and what will be most efficient? I would like to achieve 3V at 1-2mA at a distance of 20-30km.
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