Formula you are looking for might be:
y
X= --------
2sin(Z/2)
where X= optimal stacking distance
Y= lambda (boom lenght)
Z= 3 dB beamwith angle
This is from work by DL6WU
This is alo used
Stacking dist= 57.3
-------------------
3 dB beamwith / 2
This is for VHF/UHF stacking for optimum pattern EME arrays.
Will give very clean pattern with low sideloobs, i e the
array will have very good G/T.
I hope I didn´t mess these formulas up but I think this
might be what KQ2M was thinking about, in any case I dont
think it does add anything important to this subject.
73, Jim SM2EKM
------------------------------------------------------------
However, this doesnt apply for HF stacking where we
are looking for other things.
>
>
> Some advice to take the effective boom length of the antenna in
> wavelengths
> and take the square root of it. This is the optimum stacking
> distance of
> your beams in Wavelength.
>
> I think it is way too general not taking into account heights and
> antenna
> specifications.
>
> You can only find the answer with modelling software.
>
> Tonno
> ES5TV
>
> ----- Original Message -----
> From: "Robert Shohet" <kq2m@mags.net>
> To: <towertalk@contesting.com>
> Sent: Friday, July 27, 2001 8:47 PM
> Subject: [TowerTalk] Optimum Stacking Distance
>
>
> >
> > I have been told that there is a formula for the optimum stacking
> > distance
> > of similar antennas that is based on the antenna boom lengths and
> > other
> > factors.
> >
> > If anyone is familiar with this, could they please post the
> >formula?
> >
> > Tnx & 73
> >
> > Bob KQ2M
> >
> >
> >
> >
> > -----
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> >
>
>
>
> -----
> FAQ on WWW: http://www.contesting.com/FAQ/towertalk
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>
-----
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