On Sat, Feb 21, 2009 at 7:14 PM, Gus Wirth <[email protected]> wrote:
> Lan Barnes wrote:
>> I suspect the reflector from a large flashlight would do the job as well.
>
> Probably not unless the reflector came a really old flashlight and is
> made entirely of metal. Modern flashlights have reflectors made of
> plastic with a very thin aluminum coating. The coating isn't thick
> enough to be a good reflector of RF.
Flashlight reflectors are really not big enough. Remember, the
wavelength is about 4.5 inches.
A drip-catch pan intended for use on an electric kitchen stove is a
possibility. It is approximately rotationally symmetric, and would
work with a USB wireless adapter stuck at its focus. Parabolic
metal-mesh strainers intended for Chinese cooking are also good for
this job.
Go see freeantennas.com and look at the linear parabolic antennas made
to match the linear antenna that sticks out of your wireless access
point. I have been using their cardboard and aluminum foil model for
a few years.
carl
--
carl lowenstein marine physical lab u.c. san diego
[email protected]
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