Re: [N] Radio antenna height

Mike Calva (mcalva@ix.netcom.com)
Fri, 3 Sep 1999 14:09:21 -0500

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West Wight Potter Website at URL
http://www.lesbois.com/wwpotter/
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Actually if I remember my radio wave propagation. Gain with respect to
antenna is a measure of its ability to directionally acquire signal. For
example an antenna with gain would have some rejection of signals coming
from one direction, over signals coming from another direction. With a gain
antenna you aim the antenna at the signal you are attempting to acquire.
Gain is a design feature of the antenna and not affected by its height.

Eric is right however, raising the antenna gives greater coverage
(especially in the UHF/VHF bands) as the signal follows line of site.

Mike Calva
"Panacea" P19 #719 (KC0FXZ)

-----Original Message-----
From: Eric Pederson <eric@winternet.com>
To: wwpotter <wwpotter@tscnet.com>
Date: Thursday, September 02, 1999 9:42 AM
Subject: Re: [N] Radio antenna height

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> West Wight Potter Website at URL
> http://www.lesbois.com/wwpotter/
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>It has been rumored that james nolan said:
>>
>> I've noticed in several references that increasing the antenna height on
a
>> boat also increases the antenna gain, supposedly increasing its
transmitted
>> signal strength. What is the maximum height that I can put my antenna
>> without blowing out or overloading the radios of the adjacent boats?
>
>Increasing your antenna height improves radio line-of-sight, which gives
>your transmission a better chance of being received. Gain refers to the
>transmit power - either 1, 5, or 25 watts. Changing the antenna height
>does not affect the gain.
>
>--
>Eric L. Pederson
>P-19 #970, Necessity
>Bloomington, MN
>