On Wed, 26 Jan 2005 01:11:19 GMT, (Robert
Lay) wrote:

On 25 Jan 2005 16:21:57 -0800, "art" wrote:

My understanding of antenna modeling is that sharp corners or
connecting points should be avoided as they can create errors.
The question I ask is what constitutes a sharp angle ?
I am assuming that it is the capacitance at the connection is the
problem. If so
is the corner of a quad a problem or is a delta feed point on a dipole
a problem ?
I see many instances of quads being modeled and also " V" wire antennas
each without a correcting "gusset" at the corners. So when is an angle
termed to be sharp?
Regards
Art

When it is at a current maximum. At a voltage maximum it's irrelevant.
Just my opinion.

Bob, W9DMK, Dahlgren, VA
Replace "nobody" with my callsign for e-mail
http://www.qsl.net/w9dmk
http://zaffora/f2o.org/W9DMK/W9dmk.html


On second thought, it's all irrelevant. The feed lines of a balance
feed attach at the center of the dipole. That's a right angle bend at
a current maximum. Must not be a problem - everybody does it - Hi!


Bob, W9DMK, Dahlgren, VA
Replace "nobody" with my callsign for e-mail
http://www.qsl.net/w9dmk
http://zaffora/f2o.org/W9DMK/W9dmk.html

lIif you look at lamina flow on any corner there is a change because
the cross sectional area changes rapidly.. My particular programm
suggests that the point of resonance changes because of this and thus
inserts a 'corrective' action.. What this action is I do not know..
In the past I have always cut corners with a conductive member so as
to cut the intersecting angle by half., but this does not appear to
be followed in demonstration articles.
After musing over this question for some time. and without further
knoweledge, I would discount any modeling results of a fractal type
antenna which is a worst case scenario.
of kinks and bends.and corresponding cross section changes.
Regards
Art

On 25 Jan 2005 21:18:27 -0800, "art" wrote:

I would discount any modeling results of a fractal type
antenna which is a worst case scenario.

Hi Art,

Worst case of what?

73's
Richard Clark, KB7QHC

Richard, what you are angling for you will not get.
Contribute to the subject or learn from the offerings of others.
Regards
Art


"Richard Clark" wrote in message
...
On 25 Jan 2005 21:18:27 -0800, "art" wrote:

I would discount any modeling results of a fractal type
antenna which is a worst case scenario.

Hi Art,

Worst case of what?

73's
Richard Clark, KB7QHC

On Wed, 26 Jan 2005 06:03:21 GMT, "
wrote:

Richard, what you are angling for you will not get.

Hi Art,

I would discount any modeling results of a fractal type
antenna which is a worst case scenario.
Worst case of what?
A very simple question to your very un-informed statement. If you
will not explain what you mean, you demonstrate absolutely no care to
Contribute to the subject or learn from the offerings of others.
especially when you are simply throwing mud at a topic. Your kind of
badmouthing is not:
1 contributing to a subject;
2 learning;
3 nor an offering.

73's
Richard Clark, KB7QHC