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
<<mailto:g...@aeronetpr.com>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
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