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>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> 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 > ionary Consulting ** **** ** http://www.ionary.com/ > +1 617 795 2701 > > > > > -------------------------------------------------------------------------------- > 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/ >
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