wrote:
So to the gurus of this group, what actualy creates
the narrowing of the forward lobes ?

The narrowing of the forward lobes is
caused by constructive interference
during superposition of EM waves.
--
73, Cecil http://www.qsl.net/w5dxp


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Yes Cecil I can go along with that otherwise the resultant volume would be
spherical.
What is the scenario that encapsulates this "constructive interference"
event? Is it residual reactance where its underpinning reside?
Art
Art
"Cecil Moore" wrote in message
...
wrote:
So to the gurus of this group, what actualy creates
the narrowing of the forward lobes ?

The narrowing of the forward lobes is
caused by constructive interference
during superposition of EM waves.
--
73, Cecil http://www.qsl.net/w5dxp


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News==----
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Newsgroups
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"Cecil Moore" wrote in message
...
wrote:
So to the gurus of this group, what actualy creates
the narrowing of the forward lobes ?

The narrowing of the forward lobes is
caused by constructive interference
during superposition of EM waves.
--
73, Cecil http://www.qsl.net/w5dxp

Darn - I thought it was pure magic.
Now we hear all about induced currents and interference patterns cancelling
in the rearward and the sides, but constructively interferring in the
forward direction. All in an attempt to become the chosen guru of the
original poster.
If nominated, I will not run - if elected - I will not serve.

Hal I think you are right
It is magic!.
I think that this subject has been pushed to one side during the last
century in the event
anybody should come along and say all is known about antennas
so we can put them in their place.
Someday, someone will come along with an answer and then we can all jump on
him
and ask him to prove it so the monkey is not on our backs.
The post did attract a lot of interest tho even if there was not a cigar
supplied.
It really is amazing what photons can do when they become all entangled.
Time to get back to what SWR really entails when all can put their two
pennies
worth in.
I've got to now draw a circle with a compass and observe how the shape
changes when
replotted with logrithmic and other types of graph paper

Regards
Art

"Hal Rosser" wrote in message
. ..

"Cecil Moore" wrote in message
...
wrote:
So to the gurus of this group, what actualy creates
the narrowing of the forward lobes ?

The narrowing of the forward lobes is
caused by constructive interference
during superposition of EM waves.
--
73, Cecil http://www.qsl.net/w5dxp

Darn - I thought it was pure magic.
Now we hear all about induced currents and interference patterns
cancelling
in the rearward and the sides, but constructively interferring in the
forward direction. All in an attempt to become the chosen guru of the
original poster.
If nominated, I will not run - if elected - I will not serve.

I've got to now draw a circle with a compass and observe how the shape
changes when
replotted with logrithmic and other types of graph paper

Regards
Art

Be sure to give us a report on creating the logarithmic graph paper.
If I heard someone was looking to replot circles on log graph paper, I would
say he must be a ham.
Then I would think about writing a Java program to do it, as I slipped into
sleep while listening to 'Coast-to-coast-AM' on the radio.

Hal
Amateur radio operators have been convinced to display radiation patterns
on logarithmic paper to make it look more directional than normal plotting
procedure.
Since I can now generate a complete circle for an non yagi antenna array
using logarithmic paper on my antenna program I thought it would be
interesting to see
what a circle would look like when using 'standard' graph paper.( a reverse
procedure)
Now, as I write this, I realise that my antenna computor program has the
ability to
make this transition.
This will be interesting as I have no pre-expectations as to what it will
show.
Best regards
Art


"Hal Rosser" wrote in message
. ..
I've got to now draw a circle with a compass and observe how the shape
changes when
replotted with logrithmic and other types of graph paper

Regards
Art

Be sure to give us a report on creating the logarithmic graph paper.
If I heard someone was looking to replot circles on log graph paper, I
would
say he must be a ham.
Then I would think about writing a Java program to do it, as I slipped
into
sleep while listening to 'Coast-to-coast-AM' on the radio.

AHA - now we have the answer to the problem of narrow yagi lobes.
We are simply using the wrong graph paper to depict the pattern.
I'm sure that with enough planning and dedication, a committee of a few
dozen could come up with a special graph paper, custom-made to your yagi
such that no lobes would seem narrow at all.
In fact, your yagi could become the perfect isotropic radiator.
THAT's the ticket.
For a 'more fun' way to plot yagi lobes, you must use a field strength meter
and a motorcycle and a blonde.

" wrote in message
news:KVI1e.159$Vx1.16@attbi_s01...
Hal
Amateur radio operators have been convinced to display radiation patterns
on logarithmic paper to make it look more directional than normal plotting
procedure.
Since I can now generate a complete circle for an non yagi antenna array
using logarithmic paper on my antenna program I thought it would be
interesting to see
what a circle would look like when using 'standard' graph paper.( a
reverse
procedure)
Now, as I write this, I realise that my antenna computor program has the
ability to
make this transition.
This will be interesting as I have no pre-expectations as to what it will
show.
Best regards
Art


"Hal Rosser" wrote in message
. ..
I've got to now draw a circle with a compass and observe how the shape
changes when
replotted with logrithmic and other types of graph paper

Regards
Art

Be sure to give us a report on creating the logarithmic graph paper.
If I heard someone was looking to replot circles on log graph paper, I
would
say he must be a ham.
Then I would think about writing a Java program to do it, as I slipped
into
sleep while listening to 'Coast-to-coast-AM' on the radio.