Chuck
"Chuck" wrote in message
news:XrBdd.8254$6P5.7645@okepread02...
snip.

Yes there are many laws to remember and I
look at critical coupling as something to remember.

Critical coupling is simply a means to
attain element currents of a higher
amplitude than what can be expected
when one element is excited parasitically.


A zero loss transformer would not
reduce the element's current, as the
energy being introduced to the element
would remain unchanged.

Very true but what element would this max energy be applied to?

Max Energy?


Sorry about that.........I.meant current but my fingers ignored me


I was referring to the element the transformer is
attached to.

Via critical coupling the driven element may not be the one
carrying
the maximum current and thus screws up conventional thinking.

Ummmm...

Critical coupling is a state where currents
of equal amplitude flow in two inductors that
are in close proximity, as a direct result of
the coupling. Critical coupling results in a
common field as well. This also applies to
wires (elements).

Energy is one thing but it is current that controls radiation
is it not ?.

Yes, and that's what I had said previously.

The particular model I was working on used 50 segments per
wavelength
and used element length and diameters determined by my program
input .
Thus coupling gains are attained but where it sometimes
determined a
element diameter
is so thin it is incapable of carrying the required current.

I'm not sure if I follow this correctly...
please elaborate further.



Certainly
To attain maximum gain per unit length the model dimensions
were all variables as was the number of elements. Not only
was the driven element current often less than another element in the array
it was sometimes found that the maximum current element required a diameter
of a few thousanths that was not sufficient to carry 1Kw.!
Obviously the gain attained was over ruled by the inability of the element
to meet operational requirements.
I might add that I use fibre fishing rods for my antennas where I can apply
the correct
wire diameters ( or aluminum foil) to an array without being encumbered by
mechanical restrictions.
This removes me from the normal restrictions applied to antennas where
element diameter
is pre-controlled for mechanical reasons which often conflict with
scientific requirements
The above statement does conflicts with your assesment stated above
regarding critical coupling
but this is what I found and I will leave it at that
Regards
Art.



snip