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Re: Topband: 3 el in line array/broadside

To: "Wolf Ostwald" <df2py@t-online.de>, <topband@contesting.com>
Subject: Re: Topband: 3 el in line array/broadside
From: "John G3PQA" <g3pqa@onetel.com>
Date: Sat, 27 Mar 2010 14:33:56 -0000
List-post: <topband@contesting.com">mailto:topband@contesting.com>

----- Original Message -----  From: "Wolf Ostwald"  DF2PY
Subject: Topband: 3-el in line array/broadside
I am in the process of setting up three verticals spaced ¼ wave in line and
plan to feed with equal phase for broadside radiation. Supposedly the
broadside lobe drops another 10 degrees compared to a 2 el broadside with ½
wave spacing and the gain should increase by appr. 1 db. Anybody out there
 with experience or reliable modelling capabilities ?

Hi Wolf,
That appears to be the case for gain but not the lobe azimuth.
2-el broadside gain 5.62dBi, beamwidth 66 deg
3-el broadside gain 4.47dBi, beamwidth 86 deg

The model indicates the vertical lobe azimuth is 22 degrees in both cases, assuming Mininec ground flat marshy.

73 (I wish I had this antenna!)
John G3PQA


_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK


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UR RST IS ... ... ..9 QSB QSB - hw? BK
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