[amsat-bb] Re: Gain VS Bandwidth at 2.4GHZ

Roger Kolakowski rogerkola at aol.com
Sat May 16 14:27:25 PDT 2009

Not that they were optimum tuned for the 2.5 GHz frequency but what polarity
were the "Pringles Can" washer antennas that were so popular for
Net-Stumbling a few years ago?

----- Original Message -----
From: "Greg D." <ko6th_greg at hotmail.com>
To: <lucleblanc6 at videotron.ca>; <amsat-bb at amsat.org>
Sent: Saturday, May 16, 2009 2:33 PM
Subject: [amsat-bb] Re: Gain VS Bandwidth at 2.4GHZ

Hi Luc,

> Conclusion don't jump too fast on some hamfest deal as what's good for
WiFI is not always so good at 2.4ghz!

This was probably just a typo; if so, pardon the reply...

Wi-Fi and Wi-Max are different things.  An antenna designed for Wi-Max
may not operate very well, as you describe, on 2.4 ghz.  Wi-Fi's
802.11b/g is on 2.4 ghz (channel 1 is right on top of our allocation),
so a properly designed Wi-Fi antenna could be good for 13cm Ham

> P.S. I can use the antenna on 2.4ghz and i got fairly
good signal from AO-51 when he's in S mode but i cannot get rid out of
the fades.
> Could be i found why?

Pretty much every Wi-Fi antenna I've ever seen is linearly polarized.  The
"diversity" antennas are two separate antennas, usually one vertical and one
horizontal, with separate cables going to two radios.  Going circular would
seem to be a no-brain improvement for the Wi-Fi crowd, but I think I've only
seen one vendor do it.

Enjoy the new toy,

Greg  KO6TH

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