Yes, but wind load is dramatically different.
Bottom line is there is simply not enough demand for high windload
antennas to justify the compliance risk. UBNT was "safe" until they
started making some decent money. Then, after massive legal bills, they
were forced to implement DFS because their customers were not being
compliant. Production line had to be modified, coding had to be done to
appease the FCC and their communications lawyers. It was not UBNT's
fault, but in the eyes of our beautiful regulators it was. In the 5.x
range, higher gain is manufactured due to licensed frequencies being
available, and thus the ability to shift liability while increasing demand.
As I said, the problem is the regulations, not the manufacturers. But if
you disagree, you just might have another business opportunity.
I am not trying to argue. I am not happy about the regs/equipment
limitations. I use 900 mhz a lot. I would love to take some 4W
transceiver amps in the 900 range and throw in 17 dbi antennas (I know
of a few installations that have done this). But just because one can
get away with it does not mean it is good business practice. The public
sector does not seem to worry about compliance. Why not? Perhaps the
WISPS should simply start filling out FCC forms reporting violations
from the smart meters.*Or better yet, start writing press releases about
smart meter non compliance with the regulations and getting the releases
into the hands of the smart meter activists (start with infowars.com and
drudgereport.com) who can flood the FCC with reported violations.* That
seems like an activity WISPA could handle. If this was done, I suspect
the regulations would change which would result in equipment being
available.
On 8/23/2013 9:26 AM, Mike Hammett wrote:
All of the other bands have EIRP limits. You have to worry on The AP
side in 2.4 and 5.8. You have to worry on both the AP and CPE in 5.3
and 5.4.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
------------------------------------------------------------------------
*From: *"Erik Anderson" <erik.ander...@hocking.net>
*To: *wireless@wispa.org
*Sent: *Friday, August 23, 2013 8:15:27 AM
*Subject: *Re: [WISPA] Latest trend for heavy wooded areas
On 8/22/2013 5:23 PM, Mike Hammett wrote:
> I do not yet know of any source for dual polarity 900 MHz 90* sectors
> that are 18 dB nor any 900 MHz dual polarity CPE antenna that are 25
> dB of gain.
Agreed, but again, what would be the point? EIRP of 36 - 25 dBi antenna
- 1dB line loss = 11 dBm TPO. Are you really going to turn down the
radio to 11 dBm? The manufacturers are not doing it because they know
that they are creating giant antennas with massive wind low to permit
you to break the regulations and incur an FCC visit. I suspect most
WISPs have installations that are not in compliance. In fact, most
public sector installations and energy companies are probably non
compliant.
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