Hi Roger, The Pringles Can antennas are linearly polarized along the line of the "probe" stuck in at the bottom. It's actually a 1/4 wave feed.
Years ago I took a 7 turn helix and a co-worker's Pringles can out to the courtyard at work, aiming back into the building just to see how vulnerable a building's Wi-Fi signal is. The helix clearly out performed the Pringles, and I found that the Pringles was very susceptible to how it was rotated (as expected). But, "vertical" wasn't quite where I expected it. Rather it was some 15 or 20 degrees off. I have no idea if the Access Point was mounted at an angle, or if it was some other effect. And, yes, I could clearly receive the network traffic. Greg KO6TH > From: [email protected] > To: [email protected] > Date: Sat, 16 May 2009 17:27:25 -0400 > Subject: [amsat-bb] Re: Gain VS Bandwidth at 2.4GHZ > > 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? > > Roger > WA1KAT > ----- Original Message ----- > From: "Greg D." <[email protected]> > To: <[email protected]>; <[email protected]> > 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 > applications. > > > > > 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 > > > _________________________________________________________________ > Hotmail® has ever-growing storage! Don’t worry about storage limits. > http://windowslive.com/Tutorial/Hotmail/Storage?ocid=TXT_TAGLM_WL_HM_Tutoria > l_Storage1_052009 > _______________________________________________ > Sent via [email protected]. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > > _______________________________________________ > Sent via [email protected]. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb _________________________________________________________________ Hotmail® has a new way to see what's up with your friends. http://windowslive.com/Tutorial/Hotmail/WhatsNew?ocid=TXT_TAGLM_WL_HM_Tutorial_WhatsNew1_052009 _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
