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From: John Navas on 23 Jun 2010 01:20
[cross-posted to alt.internet.wireless]

On Wed, 23 Jun 2010 12:08:09 +0700, in
<e05326l2s4i9946q4i17uoocj1aa6i7uq7(a)4ax.com>, Bruce in Bangkok
<bruceinbangkok(a)invalid.com> wrote:


I've now built several different antennas for the wi-fi. The dish
works very well and about the same, as far as signal strength goes,
but better in noise rejection is a "Cantenna" I think that they called
it. Basically just a tube, calculated as a wave guide, with a radiator
1/4 wavelength from the closed end.

I'm not sure whether this is what you were recommending as there is
also a "Pringles Can" that uses reflectors and directors inside the
tube.

However, the recommended length of the "Cantenna" seems to be one wave
length. Which is about 8 inches. Because of what I welded together to
make the tube mine ended up 12 inches long, about 1.5 wave length. Dom
you think cutting the tube to 1 wave length improve signal strength?

Secondly, I am now getting greedy. Since the Cantenna and the dish
each worked very well, thank you, I'm now thinking of combining the
two. If I do that I am assuming that the mouth of the tube should be
at the focus point of the dish? right?

Cheers,

Bruce
(bruceinbangkokatgmaildotcom)
From: Larry on 23 Jun 2010 13:14
John Navas <jncl1(a)navasgroup.com> wrote in
news:oa6326tnlsaiph6j2td31o54m6fmdeok4q(a)4ax.com:

> [cross-posted to alt.internet.wireless]
>

and your purpose was?


--
Creationism is to science what storks are to obstetrics...

Larry

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