[NLRS] Fw: [TCWUG] Inexpensive wifi dish antenna ideas

[Baker, Donn B]

Thanks, Steve.  Interesting. 

At least these, unlike the "Pringels can" antenna of a couple/three years back looks as if it would work.  WA5VJB measured several Pringels cans at CSVHF/Milwaukee: the BEST was -8dB gain.  The bare probe (i.e., no can) measured 0.5 dB!

The "scoop" here should be about 7 + 20*log10(Dia-in-wavelengths) dBi gain.
30 cm dia; 12.5 cm wavelength, so 7 + 20*log(30/12.5) = 7 + 7.6 = 14.6 dBi.  Close to what's being claimed.  (The ">12 db measured" statement is more realistic.)  

73 Donn
WA2VOI/0

> -----Original Message-----
> From: nlrs-bounces at mailman.qth.net
> [mailto:nlrs-bounces at mailman.qth.net]On Behalf Of S. Earl Jarosh
> Sent: Monday, December 06, 2004 5:50 PM
> To: nlrs at mailman.qth.net
> Subject: [NLRS] Fw: [TCWUG] Inexpensive wifi dish antenna ideas
> 
> 
> I thought all ya all's would get a kick out of this site. 
> Especially Donn.
> The Wi-Fi groups actually take this stuff seriously.  I would 
> like to hear
> them explain their theory of measurement on the gain.
> 
> Earl N0HZ
> 
> ----- Original Message ----- 
> From: "Joseph Key" <jkey at tomobiki.dyndns.org>
> To: <tcwug-list at tcwug.org>
> Sent: Monday, December 06, 2004 3:28 PM
> Subject: [TCWUG] Inexpensive wifi dish antenna ideas
> 
> 
> > I found a link to this site www.usbwifi.orcon.net.nz . They 
> are using
> > inexpensive kitchen items to make cheap parabolic dishes to 
> use with usb
> > wifi dongles.  They claim some of the antennas get 15-18 db gain.
> >
> > Joseph Key
> >
> >
> > _______________________________________________
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> Minnesota
> > http://www.tcwug.org
> > tcwug-list at tcwug.org
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> >
> 
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