Well snow and ice aren't as dense as water... I always thought that the problems with ice on antennas was that 1 it deattuenates the antenna changing the frequency slightly And 2 it gets so heavy on the antenna that it breaks it off
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of evilbunny Sent: Tuesday, November 19, 2002 6:20 AM To: [EMAIL PROTECTED] Subject: Re: [BAWUG] how do roofs and snow attenuate 2.4GHz? Hello Bas, Biggest problem associated with water etc is multipath reflections not absorption... 2.4Ghz isn't the optimal freq for heating water, it's a trade off between penetration and heating... so if they are aiming to penetrate food (so u don't have cold food in the centre) then it's a good guess that snow possibly wouldn't effect things in that respect :) -- Best regards, evilbunny mailto:[EMAIL PROTECTED] http://www.cacert.org - Free Security Certificates http://www.nodedb.com - Think globally, network locally http://www.sydneywireless.com - Telecommunications Freedom Wednesday, November 20, 2002, 12:33:54 AM, you wrote: BJ> I don't know the reason. Just in the past few days saw a discussion BJ> where experts concluded that Rain does not affect the 2.4 Ghz. Also BJ> saw pictures of Omni Antenna covered by a few inches of Ice and it BJ> was supposedly still working. BJ> Bas BJ> ------------ BJ> why not? isn't water supposed to resonate at 2.4 Ghz? ie, isn't that BJ> how microwave ovens operate? BJ> -todd BJ> On Sun, 17 Nov 2002, Bas Jensma wrote: >> Snow and rain does not much affect the 2.4 GHz frequencies. >> >> Bas >> >> >> ------------ >> Stuart Normanton [EMAIL PROTECTED] >> Sat Nov 16 13:32:00 2002 >> >> * Previous message: [BAWUG] how do roofs and snow attenuate >> 2.4GHz? >> * Next message: [BAWUG] Boingo and Email >> * Messages sorted by: [ date ] [ thread ] [ subject ] [ author BJ> ] >> >> So the snow covering the solar panel cells wasn't an issue? >> >> Or were you using UPS. >> >> ----- Original Message ----- >> From: "Todd Hansen" <[EMAIL PROTECTED]> >> To: <[EMAIL PROTECTED]> >> Cc: <[EMAIL PROTECTED]> >> Sent: Saturday, November 16, 2002 5:55 PM >> Subject: Re: [BAWUG] how do roofs and snow attenuate 2.4GHz? >> >> >> > >> > http://hpwren.ucsd.edu/Photos/20010112/ >> > >> > we had a bit of ice once. it didn't cause us any trouble (not BJ> sure >> why, I >> > expected it to kill the signal). Sometimes, I think we have more >> trouble >> > on warm days with ducting then with snow. >> > >> > On Fri, 15 Nov 2002, David Young wrote: >> > >> > > >> > > Will 2.4GHz easily penetrate a steeply pitched roof built of BJ> wood >> > > sheathing and asphalt shingles? >> > > >> > > Out here on the edges of the Bay Area, three to six inches of >> snow will >> > > sometimes cover a roof. How will that affect signal strength? >> > > >> > > Dave >> > > >> > > -- >> > > David Young OJC Technologies >> > > [EMAIL PROTECTED] Engineering from the Right Brain >> > > Urbana, IL * (217) 278-3933 >> > > -- BJ> __________________________________________________ BJ> Do you Yahoo!? BJ> Yahoo! Web Hosting - Let the expert host your site BJ> http://webhosting.yahoo.com BJ> -- BJ> general wireless list, a bawug thing <http://www.bawug.org/> BJ> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
