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The windows are probably low-E with a metalized film in the middle. Great radio reflector.
Scott Reed Owner NewWays Wireless Networking Network Design, Installation and Administration www.nwwnet.net The season is Christmas, not X-mas, not the holiday, but Christmas, because Christ was born to provide salvation to all who will believe! ---------- Original Message ----------- From: Matt Liotta <[EMAIL PROTECTED]> To: [EMAIL PROTECTED], WISPA General List <wireless@wispa.org> Sent: Tue, 03 Jan 2006 10:07:47 -0500 Subject: Re: [WISPA] 2.4GHz vs 5GHz > We have a 5.8Ghz link where the antenna is directly behind concrete that > works significantly better than through the windows in the same building. > > -Matt > > Blair Davis wrote: > > > My practical tests show that 2.4GHz works better in a rural Near LosS > > environment. This is using 802.11b/g vs 802.11a. > > > > I have had no luck with 5.3/5.8GHz in a rural Near/Non LoS > > environment. On the other hand, 5.8Ghz seems to be fine at range in > > LoS conditions. > > > > Go figure. > > > > Paul Hendry wrote: > > > >> Just noticed that the document also says that 5GHz is better for passing > >> through damp tree areas than 2.4GHz as 2.4GHz is very close to the O-H > >> frequency which water is full of and therefore water absorbs 2.4GHz > >> signals > >> considerably more than 5GHz. If this is true then why is 2.4GHz > >> better for > >> tree NLOS environments than 5GHz? > >> > >> -----Original Message----- > >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > >> Behalf Of Paul Hendry > >> Sent: 03 January 2006 11:48 > >> To: 'WISPA General List' > >> Subject: RE: [WISPA] 2.4GHz vs 5GHz > >> > >> I thought that was it but needed someone to clarify ;) What about 5GHz > >> penetrating walls much better than 2.4GHz? > >> > >> -----Original Message----- > >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > >> Behalf Of Mike Delp > >> Sent: 03 January 2006 11:44 > >> To: 'WISPA General List' > >> Subject: RE: [WISPA] 2.4GHz vs 5GHz > >> > >> Paul, > >> > >> 5 GHz works NLOS in an urban environment. Bouncing around buildings, > >> etc. > >> Look at the success of Redline and Orthogon. OFDM and 5 GHz works > >> well for > >> them. An environment with trees is different. Trees absorb the > >> signals, > >> instead of bouncing them. Especially wet trees! > >> We utilize 2.4 at every pop, mainly because of the low cost for > >> deployment, > >> and general coverage. We utilize 5 GHz frequently and also 900 MHz > >> for NLOS > >> issues. > >> > >> > >> I hope this helps > >> > >> Mike > >> > >> > >> > >> -----Original Message----- > >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > >> Behalf Of Paul Hendry > >> Sent: Tuesday, January 03, 2006 4:44 AM > >> To: 'WISPA General List' > >> Subject: [WISPA] 2.4GHz vs 5GHz > >> > >> Ola everybody, > >> > >> I hope everyone had a great Christmas and New Year and are all ready > >> for 2006, the year of the WISP :) > >> When I have setup wireless in an area it has always depended on the > >> Geographic's of the area as to if we deploy 2.4GHz or 5GHz and I have > >> always > >> decided that 2.4 should be used where NLOS could be an issue. This > >> decision > >> has always been based on the fact that the lower frequency will pass > >> through > >> trees a lot easier however I have recently read a white paper that > >> suggests > >> otherwise. Basically the document says that the higher the frequency, > >> the > >> better the scatter (the ability to bounce of and around objects). It > >> also > >> says that 5GHz is better at penetrating walls. > >> So my question is, have I been basing some of our deployments on > >> false information or am I missing something here? I know that in tests I > >> have seen a more stable signal at 2.4GHz in a NLOS environment but is > >> this > >> just a fluke? > >> > >> Cheers, > >> > >> P. > >> > >> > >> > >> > > > > > > -- > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ ------- End of Original Message ------- |
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