Yes short hops... whats your price range for "pricey" Gino A. Villarini g...@aeronetpr.com<mailto:g...@aeronetpr.com> Aeronet Wireless Broadband Corp. 787.273.4143 From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Cameron Crum Sent: Friday, July 29, 2011 2:58 PM To: WISPA General List Subject: Re: [WISPA] inexpensive non-2.4/5.8 backhaul ?
I'm aware of all that, but 24GHz still attenuates fairly quickly and rain fade will be a problem if you try to go too far. It would be good for short hops, though. It still seems a bit pricey. On Fri, Jul 29, 2011 at 1:44 PM, Fred Goldstein <fgoldst...@ionary.com<mailto:fgoldst...@ionary.com>> wrote: At 7/29/2011 02:38 PM, Cameron Crum wrote: I just assumed if you pay that much for a link it would be in the licensed band. Still though, I can't imagine too many people using the unlicensed 24 ghz band, It should be pretty clear, but if you can't bgo bigger than a 2ft dish, I guess you are pretty limited. Directivity increases with frequency, for a given dish size, so a 24 GHz 2-foot dish is as directive as a 6 GHz 8-foot dish. Aiming should be, well, rather fun... But the rules are a little weird, so a bigger antenna would probably run afoul of the field strength limit. 24 GHz doesn't specify a power level, but it requires at least a 1-foot dish (33 dB gain) for directivity, and the maximum field strength is 2.5 v/m at 3 meters. I don't offhand know the formula for converting that to ERP. But the Exalt has a 10 milliwatt (+10 dB) output which would mean an ERP of around 20 watts with a 1-foot dish. (Values are from memory, not precise.) Cameron On Fri, Jul 29, 2011 at 1:24 PM, Gino Villarini <g...@aeronetpr.com<mailto:g...@aeronetpr.com>> wrote: There are 2 24 ghz blocks available for MW links, one is unlicensed the other is not -- Fred Goldstein k1io fgoldstein "at" ionary.com<http://ionary.com> ionary Consulting http://www.ionary.com/ +1 617 795 2701<tel:%2B1%20617%20795%202701> -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org<mailto:wireless@wispa.org> Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
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