I have a 5 mile link where I'm not quite sure if the antenna is above the
trees or not as it is on top of a mast. That link is on the better side
of -80 for almost 2 years. Based on that I'd think I'd be okay at a half
mile or less. I figured that with most of the town at better than -60 and a
lot better than -50, I could stand to go through a few meters of tree, but
that's why I came here to ask. ;-)
Based on the numbers on the site I looked at, 10 db of attenuation is 27' of
foliage. That'd put 20 db at 55' of foliage.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
----- Original Message -----
From: "Jack Unger" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Friday, June 22, 2007 10:22 AM
Subject: Re: [WISPA] 5 GHz attenuation
Mike,
Good to go as long as the TV towers allow you to get the CPE antennas
above the trees.
jack
Mike Hammett wrote:
Most of my coverage area is open fields, so there isn't much to making a
link work.
I have an increasing demand to install an AP in a small town (no point
within town is further than 1/2 mile away from the tower site). I prefer
to use 5 GHz due to the amount of spectrum available. An article I read
said 1.5 db per meter of foliage or 20 db per tree in 5 GHz.
The grain leg is 100 - 150 feet tall. Many houses have TV towers. Radio
Mobile (not counting foliage) says the worst signal I can expect to see
is in the 60s with most in the 50s or 40s.
Safe to assume that most of the town will be good to go?
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
--
Jack Unger ([EMAIL PROTECTED]) - President, Ask-Wi.Com, Inc.
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