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Posted by Guru on May 24, 2007, 8:40 am
 
Someone knew about optical rectenna?

--
Guru       Non coltivate i beni terreni,
               non rimarrà niente.
         Coltivate l'amore delle persone,
            vale più di qualsiasi oro.

Posted by never on May 24, 2007, 4:45 pm
 
On Thu, 24 May 2007 10:40:54 +0200, guru79@libero.it (Guru) wrote:


Straight ahead literal transaltion from babelfish:

Not cultivated the assets lands, will not remain nothing. Cultivated
the love of the persons, is worth more than whichever gold.

Posted by Anthony Matonak on May 24, 2007, 6:00 pm
 Guru wrote:

Sure, it's an idea that's been kicking around for generations.
I think it was even patented in the late 70's.

It goes like this...
Radio and light are both electromagnetic radiation. We convert
radio waves with antennas and rectifiers so we could convert
light the same way. All you need are antennas the size of the
wavelength of light and rectifiers (diodes even) that work at
the same frequencies.

The problem is that no one has been able to actually build them.
The antennas are possible but no one has managed the diodes.

Anthony

Posted by Guru on May 24, 2007, 7:31 pm
 

The problems are on the diodes?? NREL had studied it, but didn't report
diodes problems...

--
Guru       Non coltivate i beni terreni,
               non rimarrà niente.
         Coltivate l'amore delle persone,
            vale più di qualsiasi oro.

Posted by BobG on May 25, 2007, 12:02 am
 What's the lowest Vgs logic level mosfet? If you could make one switch
on less volts than a diode, you could make synchronous rectifiers out
of them.


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