well thats interesting, but you didn't address the primary question of polarity.
Or what polarity hotspot CPE devices generally see. Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: "Charles Wyble" <char...@thewybles.com> To: "WISPA General List" <wireless@wispa.org> Sent: Thursday, April 30, 2009 2:30 PM Subject: Re: [WISPA] WAN HotSpot and Polarity >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! 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! 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! 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/
