<html>
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 10 (filtered)">
<style>
<!--
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:Arial;}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:navy;
text-decoration:underline;}
span.EmailStyle17
{font-family:Arial;
color:windowtext;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=EN-US link=blue vlink=navy>
<div class=Section1>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>I
have a design question for a project that I am working on for my work. I
would like to run it past my friends here in the TCWUG to see if you can see
any flaws in my thinking or my design. Any feedback will be valuable.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'><br>
I am currently designing a </span></font><font size=2><span style='font-size:
10.0pt'>Wireless</span></font><font size=2><span style='font-size:10.0pt'> </span></font><font
size=2><span style='font-size:10.0pt'>Bridge</span></font><font size=2><span
style='font-size:10.0pt'> between </span></font><font size=2><span
style='font-size:10.0pt'>Fridley & Brooklyn</span></font><font size=2><span
style='font-size:10.0pt'> </span></font><font size=2><span style='font-size:
10.0pt'>Park</span></font><font size=2><span style='font-size:10.0pt'>.
The total distance of the bridge is 4.45 miles. We cannot obtain direct
line of site between the two sites without building a 200’ tall tower at
the site in BP, but both have a clear line of sight to a water tower in BP.
The distance from </span></font><font size=2><span style='font-size:10.0pt'>Fridley</span></font><font
size=2><span style='font-size:10.0pt'> to the BP Water Tower is 3.88 miles; the
distance from the BP site to the Water Tower is .941 miles. I will be
using 21dbi Parabolic Dish antennas at each site.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>The
design I am proposing is to use a passive antenna array atop the water tower,
just take two 21dbi Parabolic Dish antennas and connect them back to back using
a lightning arrestor, having one dish point to </span></font><font size=2><span
style='font-size:10.0pt'>Fridley</span></font><font size=2><span
style='font-size:10.0pt'> and the other to the BP office. I figure I
could pull this off because of the short distances involved, and the customer
doesn’t want to pay monthly rental fees to put a radio atop the tower
(paying for electricity & all), much less suffer the throughput loss (from
11mbps to 5.5mbps) that one does by using a radio relay.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>I
think this could work, but is there something I’m missing? Has anyone
else done this before? I’d hate to recommend something that won’t
work.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Thank
you for your help in advance,</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt'>Joel
R. Helgeson</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Director
of Networking & Security Services</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>SymetriQ
Corporation, www.symetriq.com</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>8500
Normandale Lake Boulevard, Suite 1670</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Bloomington</span></font><font
size=2><span style='font-size:10.0pt'>, </span></font><font size=2><span
style='font-size:10.0pt'>Minnesota</span></font><font size=2><span
style='font-size:10.0pt'> </span></font><font size=2><span style='font-size:
10.0pt'>55437-3813</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Office:
(952) 921-8869</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Cell:
(651) 270-7521</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>"An
investment in knowledge pays the best dividends." - Benjamin Franklin</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:11.0pt'> </span></font></p>
</div>
</body>
</html>