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Old April 15th 07, 07:58 PM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Mar 2007
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Default Constructive interference in radiowave propagation

Jim Kelley wrote:
As I said, Cecil, your ideas about waves 'possessing energy' need a
little work.


Complete lack of technical content or technical defense
of your assertions is noted - nothing but a bunch of
hand-waving.

One more challenge for you, Jim. If you can prove that
an EM wave can exist without the associated ExB energy, you
will no doubt win a Nobel Prize in Physics.

Here's what Hecht says: "Any electromagnetic wave exists
within some region of space, and it is therefore natural
to consider the *radiant energy per unit volume*, or
*energy density*. We suppose that the electric field itself
can somehow store energy. This is a major logical step
since it imparts to the field the attribute of physical
reality - if the field has energy, it is a thing-in-itself."

Maybe it's past time for you to take that logical step
that Hecht took so long ago?

"To represent the flow of electromagnetic energy associated
with a traveling wave, let 'S' symbolize the transport of
energy per unit time (the power) across a unit area. ...
it has come to be known as the *Poynting vector*."

Hecht labels the energy per unit time in an EM wave as
"power". Hecht's Poynting vector equations contain cosine
terms. Hecht shoots down virtually every one of your
assertions and objections.

I notice you carefully avoided my S-Parameter example.
--
73, Cecil http://www.w5dxp.com
 
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