Topband: 3 el in line array/broadside

[John G3PQA]

> ----- 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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