Re: Soljacic wins $10k MIT Young Scholar Award (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sat, 01 Sep 2007 13:45:37 -0300
From: Antonio Carlos M. de Queiroz <acmdq@xxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Soljacic wins $10k MIT Young Scholar Award (fwd)

Tesla list wrote:
> ---------- Forwarded message ----------
> Date: Fri, 31 Aug 2007 09:49:32 -0400
> From: "Mccauley, Daniel H" <daniel.h.mccauley@xxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: RE: Soljacic wins $10k MIT Young Scholar Award (fwd)
>
>  
> Why is this so sad?
> I'm not really up on the technology being presented, but what evidence
> is there to show this is nonsense?
>   
It's not nonsense. But it is nothing new, and doesn't seem to be 
practical to have the transmitter and the
receiver having sizes of the same magnitude of the distance between 
them, to have reasonable amounts
of energy transferred.
The basic idea is to have a resonant transmitter generating high voltage 
in an antenna, that couples
capacitively (essentially) to an identical receiver, that converts the 
low-current, high-voltage signal
 received trough the capacitance between the antennas to usable levels 
of voltage and current again.
The transmitter and the receiver antennas are kept small relative to the 
wavelength used to avoid
significant radiation. Everything happens within the "local field" of 
the receiver and transmitter.
I am making some experiments with a system using grounded transmitter 
and receiver, that easily
transmits 0.25-0.5 of the input power to a few meters away. Curious 
demonstration, but the amount
of wire used is much greater than the necessary to transport the power 
directly...

Antonio Carlos M. de Queiroz