Re: Wifi Booster for less than a buck.

Yes, there is likely a fraction of a db of loss in the solder joint,  
and more importantly if you don't get your measurements exactly right,  
it's not going to be tuned to the correct frequency (2.4ghz). With all  
that in mind, all this is doing is creating an omni that has a  
"flatter" horizontal plane, thus focusing power further out  
(increasing horizontal range) while directing power away from the  
vertical plane (decreasing your vertical range).

Basically the same idea as replacing your linksys rubber ducky antenna  
with a 9dbi omni. It's misleading that they call this a "booster"...

On Nov 20, 2007, at 3:34 PM, Russell Senior wrote:

>>>>>> "Tom" == Tom Higgins <[email protected]> writes:
>
> Tom> Someone give this a try, id love to see what the hard numbers
> Tom> are.  If I get a break in the holidays I might try it on an old
> Tom> linksys duck.
>
> I've cobbled together something similar while testing 11a radios and
> needing something to radiate *something*.  What the video is showing
> is equivalent to about a 5 dBi antenna, which is where the "twice the
> range and twice the power" is coming from.  5 dBi is "twice the power"
> compared to 2 dBi, as your power doubles for every 3 dB.  However,
> your power drops as the square of the distance (2 squared is 4x) or
> about 6 dBi for every doubling of distance, so that part is wrong.
> Bearing in mind my non-expertness in RF, I'd be suspicious of losses
> in that solder joint too, if it isn't done cleanly.
>
> The nice book
>
>   http://wndw.net/download.html
>
> has some material on antenna construction and theory.  It even points
> at some software NEC2.  See:
>
>   http://wndw.net/pdf/chapter4.pdf
>
>
> -- 
> Russell Senior, Secretary
> [email protected]
>
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