[AReU] Ground plane VS Counterpoise or what?

[Ray LaRue]

Terry,
The answer is "all of the above".

On the side that the antenna is in the clear and 25' above ground, you would
have  performance mostly like the books predict.  On the side of the garage,
the pattern would be much harder to anticipate.  The band of operation would
be very important.  A UHF antenna would be marginally affected.  As you come
down in frequency the effects of the steel in the building would be more
pronounced and harder to predict.  There would be perturbations in the
pattern on that side.

Setting the theory and books aside though, if you are not a perfectionist
and only wish to "get out", go ahead and install it.  More than likely it
will work fine for all practical purposes, regardless of the band of
operation.
73,
Ray, W4BYG
Naples, FL

----- Original Message ----- 
From: "Terry Petrash" <terrypetrash at yahoo.com>
To: <AReU at mailman.qth.net>
Sent: Friday, January 07, 2005 1:30 PM
Subject: [AReU] Ground plane VS Counterpoise or what?


> OK, RU members, it's time to put on your thinking caps on and
> offer me an "opinion" and possibly a solid correct answer.
>
> If you were going to erect an antenna on a 5 foot pole above the
> top surface of a building that is 25 feet above ground and that
> building happens to be a parking garage which is made up of
> steel reinforced precast concrete, would you be looking at an
> antenna that is considered 5 feet or 30 feet above ground in
> considering ground plane reflectivity?
>
> I have this delema and am trying to figure it out.  If you don't
> have an answer how about any practical ways to test measure this
> situation to find out, please let me know.
>
> 73's
> Terry
> WA4BYK
>
>
>
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