I found that with a NanoStation2 I was able to provide coverage to an entire strip mall. Google earth it:
229 Main Street El Segundo, CA 90245 is where I deployed the AP. It's a fairly standard strip mall. I covered the entire mall, plus across the street in all 4 directions. Tom DeReggi wrote: > Over the years, there have been many theories and strategies regarding what > polarity is best to use for various purposes. > As an engineer, I as well have my theories. But, I wanted to get an updated > opinion based on field trials of others, for the following application.... > > Application... 2.4Ghz WAN WIFI HotSpot > Specs... > 1) Average sub located within 100 yards to 1/2 mile. > 2) Find and Subscribe by "Search for available Networks", via laptop's WIFI > card. > 3) If RF signal good enough to get a web splash screen to user, will display > instruction for ordering higher gain antenna self-install kit for inside > their window mount or balcony. > 4) Access Point would likely use a sector panel (60 deg?), with an EIRP of > 36db. > > The goal here is.... enabling residential users to find the ISP's AP on > their own. > > So my questions are.... > > 1. If a Horizontally polarized antenna is used at the AP, Is it likely the > consumer will equally be able to find your AP, compared to if it had been > verical pol'd? > > The idea being, horizontal pol's noise floor is much lower in the particular > area, and more likely ISP will avoid the noise from consumer APs that ship > with vert pol antennas, where end users by default will stick the antennas > straight up in Verticle pol position. > > 2. By the time the ISP's horizontal signal gets to the end user, is it > received in multiple polarities, based on all the reflections in end users > home and stuff? > > 3. Are laptop wifi cards typically "no polarity", and pick up Horizontal as > good as verticle signals? > > 4. Laptops would appear to have Horizontal pol antennas in some cases, > expecially if a PCMCIA card. Is this true? Or are most laptops starting to > embed verticle pol antennas on the sides of screens? > > 5. Are End Users getting savy enough to move their laptop all around, when > they first take it out of the box, to try and find Horizontal pol APs of > ISPs Hotspots? > > In summary.... If doing Hotspot WAN deployment, and Verticle noise is > significantly higher, will an ISP be doing a smart thing putting their > sector on Horiz pol to avoid noise, or shooting themself in the foot because > they'll be sending a signal cross pol to the average end user's verticle > pol's Wifi card, taking a 20db hit off the bat? > > Sure.... Horizontal will be better, if the the consumer gets a professional > install, or learns to put an external horizontal pol antenna on their laptop > or PC. But most people may not know to do that, by default, for hotspot self > subscription. (PS. recognize could use dual pol or 45deg off pol, but > purposely avoiding that, to try not to interfere with others, to enable more > people to play in the same spectrum) > > What have other's found? > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > > ----- Original Message ----- > From: "George Rogato" <wi...@oregonfast.net> > To: "WISPA General List" <wireless@wispa.org> > Sent: Wednesday, April 29, 2009 8:27 PM > Subject: Re: [WISPA] RB333/433 eliminating self-interference test > > >> Tom DeReggi wrote: >>> Good point but..... the problem went away when the mcpi cards each had >>> their own SBC/Case, this would infer card to card or pigtail to pigtail >>> interference, since in all cases the dummy load was outside the cases, >>> from what it sounds like. >>> >>> I guess that should be clarified.... >>> >>> Kurt, when you tested with teh RB600 and 3 cards on the adjacent slots, >>> was the RB600 also in a case with the holes metal taped? >>> >>> >>> Tom DeReggi >>> RapidDSL & Wireless, Inc >>> IntAirNet- Fixed Wireless Broadband >>> >>> >>> >> Question I have that should debunk that theory that cards in close >> proximity interfere with each other. Why do the cards not interfere with >> each other when there is additional gain antennas hooked on to them? >> >> You would think there would be even more self interference with high >> gain antennas than with no antennas.... >> >> >> >> -------------------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> -------------------------------------------------------------------------------- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ > > > > -------------------------------------------------------------------------------- > WISPA Wants You! 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