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

[evilbunny]

Hello Will,

Have you seen the umbrella satellite dish?

link somewhere in the ones on sydneywireless.com form memory...

-- 
Best regards,
 evilbunny                            mailto:evilbunny at sydneywireless.com

http://www.SydneyWireless.com - Exercise your communications
freedom to make it do what you never thought possible... 

Monday, June 24, 2002, 1:14:03 PM, you wrote:

WL> No, you are entirely correct.

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

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

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

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


WL> 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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>> 


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