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On Thu, Jun 14, 2007 at 12:14:44PM -0400, David VanHorn wrote:
> Gentlemen..  If you're so disposed, and in need of some comic relief,
> I'd appreciate your thoughts on the following article.  I couldn't get
> a reasonable URL for it, but if you google the following, it's the
> first hit.
> 
> "Daniel Harrist - Wireless Battery Charging Systems using Radio
> Frequency Energy Harvesting"
> 
> 
> Am I nuts, or is this really as badly done as I think it is?
> 
> I notice in his simulations that the RF source is not spelled out to
> us, wether it is a mW or a MW will have some impact on the results.
> 
> Also, I am somewhat (gag-cough-sputter) skeptical of how much power is
> available within the volume of space captured by a 915 MHz whip
> antenna.  He also seems to want to improve this by using a smaller
> antenna!
> 
> Finally, the load in sim is simply a capacitor, so his sim reflects NO
> ability to deliver joules into a battery.
> 
> Frankly, I don't see this working unless it's used INSIDE a microwave oven.

Well now that you mention it... I've sure you've all seen those little
heat pack things that you put in the microwave to warm up.

Why not a flashlight that you put in the microwave to charge?

- -- 
http://petertodd.org
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