I would think the change in gain would depend on the arrival angle, the
heights of the two antennas and the quality of the ground (reflection
losses).
Where does the 3db rule of thumb come from?
Regards,
Rajiv, N2RD
----- Original Message -----
From: "Pete Smith" <n4zr@contesting.com>
To: <towertalk@contesting.com>
Sent: Friday, March 22, 2002 9:51 AM
Subject: [Towertalk] limitations of stacking
> Is there a theoretical reason why the gain resulting from stacking two HF
> yagis over real ground is limited to 3 dB? I have a model of two C-3Es
> that shows 3.5 dB increase over a single C-3E in the top position. I'm
> trying to figure out if this is a modeling anomaly of some sort...
>
> 73, Pete N4ZR
>
> Check out the World HF
> Contest Station Database at
> www.pvrc.org
>
>
>
>
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