[MLB-WIRELESS] More antenna ideas (Was: Mobile phone antennas)

[Will Lotto]

No, you are entirely correct.

The only reason galexy et al. dishes are a mesh rather than a dish is
because of wind loading.

The amount of braces needed to hold a 2M satallite dish steady in a
strong wind is huge compared to that needed to hold a wire dish.

Technically a plastic/flywire dish would be perfect for 802.11b, all you
need to do is put a standard galexy collector (designes will be
somewhere on the net) at the focal point of the parabolic dish and
you're set. ... Now all you've gotta do is hold the thing steady.

I would recommend lard, but I don't know how well it reflects/absorbs/is
transparent to 2.4ghz radio signals. I'm not sure if many studies have
been conducted in this area either. MelbWireless could lead the world on
2.4ghz lard studies. .. You never know :)


Will.

> -----Original Message-----
> From: owner-melbwireless at wireless.org.au 
> [mailto:owner-melbwireless at wireless.org.au] On Behalf Of 
> fenn_b at smktech.com.au
> Sent: Monday, 24 June 2002 11:47 AM
> To: melbwireless at wireless.org.au
> Subject: RE: [MLB-WIRELESS] More antenna ideas (Was: Mobile 
> phone antennas)
> 
> 
> > this might be fun to try some time...  mind you, my
> > antenae theory is non-existant, so this might just be a 
> pipe dream...
> >
> 
> On the theme of antenna ideas, pipe dreams and a complete lack of
> antenna theory: ;)
> 
> I have been having a think about this - I have access to suitable
> machinery to manufacture a perfect parabolic dish template 
> (in whatever:
> metal, wood, plastic, lard). I was thinking - Would it be
> possible/worthwhile with such a template to use something like
> fiberglass matting + some sort of metal core (flywire?) laid 
> over it to
> form a very cheap, very light, high-gain parabolic dish 
> suitable for our
> purposes?
> 
> If it's useful, we could have an group antenna-day and churn 
> out a whole
> heap of them to replace the lack of easy-to-obtain galaxies.
> 
> Am I just waaaaaaaaaaaaay of base here or maybe onto something that
> could be construed as slightly more than completely useless? ;)
> 
> 	Fenn.
> 
> 
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