Anything related to 11Ghz, should be WISPs concern. It is my belief that
all serious unlicensed ISPs will at some point start to migrate to Licensed
spectrums for backhauls. 11Ghz is one of the few upgrade options available
for WISP's that designed their existing backhaul to 5.8Ghz functionality.
(meaning needing 4ft dish 11Ghz to reach equivellent distances of 5.8Ghz 2ft
dish links, in practicality). There really aren't very many Long range
backhaul spectrum range options out there. Relaxing the rules could result
in the inabilty for many WISPs to obtain 11Ghz licenses, because of
unavailable spectrum, when they are ready to need it. A 2ft dish beamwidth
(9-10 degrees) will cover the width of most of a small city at 10 miles.
(Sorry I didn't do the Angle math yet). Compared to that of 4 ft dish
beamwidths. As much as I'd like a 2 ft Dish, how would that effect my
future abilty to get a license? Thats an important question. Fibertower
wants 2ft dishes today because they are ready to buy up the licenses today.
Are the rest of the WISPs ready to buy the licenses today? How much license
space is available still? I think some propogation data and current
saturation data (number of links / potential for more links) would need to
be disclosed first to develop a relevant opinion. And how would the rules
effect cost? Currently 11Ghz is significantly more expensive to obtain
because of dish size. If smaller more advanced dishes were allowed, a 2ft
dish that had the characteristics of 3-4ft dishes, would those dishes be
more expensive because of their unique better characterisitcs? The truth
is, every provider would chose 11Ghz over 18Ghz, if they could get away with
a smaller dish. It would likely lead to less use of 18Ghz and 23 Ghz. Is
18Ghz getting saturated? If so it would be relevent to allow 11Ghz to take
over the load. But I'd argue that 18Ghz should be near at capacity before
11Ghz be allowed to be more leanent in antenna size.
The bigger fight for smaller antennas is to allow 6Ghz to be allowed to use
4 ft dishes. 6ft dish requirement is insane. If 6Ghz was allowed to use 4ft
dished, it would then give another option for long range, (within a
realistic antenna size for roof tops), then justifying the allowance for
11Ghz to have smaller antennas. The question is, why isn't Fibertower just
using 18Ghz in their applications? Can they prove that 18Ghz is to limiting
or unavailable for them?
Tom DeReggi
RapidDSL & Wireless, Inc
IntAirNet- Fixed Wireless Broadband
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