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Re: [LUG] Asus, again : Wifi Antenna

 

On Fri, 2007-11-30 at 08:50 +0000, Tom Potts wrote:
> On Thursday 29 November 2007 20:06, Dave Berkeley wrote:
> > On Thursday 29 November 2007 19:16:49 Tom Potts wrote:
> > > On Thursday 29 November 2007 18:15, Rob Beard wrote:
> > > > Do you have a link?
> > >
> > > http://www.groklaw.net/
> > > currently 2nd article  down on the RHS
> > >
> > > > Are Asus trying to get GPLv3 code re-licensed as GPLv2?
> > >
> > > I must confess battle fatigue on this one but PJ is normally pretty
> > > reliable. I'd recommend the single malt solution - I think its just Asus
> > > having a few problems getting their act together. It looks like their
> > > trying their best but they've a few things to fix.
> > > Drink malt, wait a while, when the dust has settled and they're fully GPL
> > > compliant you can get on with the more serious task of working out
> > > whether you can really utilise one of these things ... I've already got
> > > to the stage of working out where to put a wifi mast so I can use this
> > > while working in the polytunnel - I'm a farmer and I really really want
> > > one! Can you die from viral marketing?
> > > Tom te tom te tom
> >
> > I always wondered about these. Just a parabola I guess.
> >
> > http://www.theregister.co.uk/2004/07/09/flatenna_wi-fi_booster/
> >
> > There are a host of different designs you might try
> >
> > http://www.oreillynet.com/cs/weblog/view/wlg/448
> > http://www.turnpoint.net/wireless/has.html
> > http://flakey.info/antenna/biquad/
> > http://www.xs4all.nl/~tom1572/eng/
> > http://martybugs.net/wireless/biquad/
> > http://martybugs.net/wireless/biquad/double.cgi
> >
> > You can get 10km out of a big parabolic dish apparently.
> >
> > Rob Flickenger wrote a good book on all this stuff
> >
> > http://www.amazon.co.uk/exec/obidos/ISBN%3D0596005024
> >
> > D
> I dont know if theres a commercial one out there but one humdinger of an 
> antenna is flat Fresnel antenna - a bit like the lens but just concentric 
> rings correctly space to work like a parabolic reflector.
> When Sky (hock spit) first came on the scene there were a lot of complaints 
> about the hideous scarring of British architecture with dishes. These were 
> expensive - a flat Fresnel of the same collecting power laid out flat in the 
> loft would have cost <£10 and not spoilt the external appearance of the 
> property. But as the great selling power of Sky was never its program content 
> they had to rely on penis envy hence dishes!
> The continued triumph of marketing over engineering!
> Tom te tom te tom
> 
> 
This reminds me of the square BSB (B-Sky-B?) antennas that were around a
few years ago.  They had some kind of array of little rectangles under
the paint, I believe.  Went the same way as Betamax of course...

Alexis Phoenix


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