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Old January 9th 04, 05:08 PM
Art Unwin KB9MZ
 
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Default inducors/form factors/radiation revisited

My last attempt on this subject only attracted lurkers and not those
that were technically minded so I thought I would try harder at the
communication side.
If one uses the present day modeling programs, items such as
inductance
are taken as point loads of zero length. Since in the real world
inductance does has length a way of modeling it would be to redraw it
as a distrubited
load along the length of the actual inductor. When doing this modeling
shows that current DOES NOT Change over the length of the inductance,
thus there is no radiation..
Ignoring intercapacitance this supports the previous stand of Tom and
Roy.
Taking this point further, one wonders why inductors in the real world
are not designed to be a point load, albiet in a two dimensional
world.
so that the length origionaly used by following published form factor
can be used to RADIATE . In this sense it follows that inductances
should be made in spiral form with special attention made to reducing
intercapacitance ala basket weave pancake design.
The above flies in the face of what is presently published in books
but so is the relationship of linear designs based on distance
between physical dipoles instead of the distance between current max
points so books are not infallable.
The above does also question the practice of grounding a center
point of a wound inductance since the above suggests that current is
NOT zero at that point! Since Roy was correct in the first place
maybe he will add some comments on what may be fallacious conclusions
that I made on my part.
Best regards
Art
 
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