The complete text referenced here can be accessed at:

http://eznec.com/misc/food_for_thought/

The first one is "Forward and reverse power" and is much
easier to read if it is copied-and-pasted into Word.

The first comment is just a nit: "(the current isn't
transformed by the half wavelength line either.)"

A 1/2 wavelength of transmission line reverses the
phase of the current, certainly a 180 degree
"transformation".

The main point centers around this false statement:
"While the nature of the voltage and current waves when
encountering an impedance discontinuity is well understood,
we're lacking a model of what happens to this "reverse power"
we've calculated."

Absolutely false! We are not lacking a model. We have time-
tested models that people with closed minds simply refuse to
consider. One such model is the s-parameter analysis presented
in HP's App Note 95-1, available on the web. Quoting: "Another
advantage of s-parameters springs from the simple relationship
between the variables a1, a2, b1, and b2, and various *POWER
WAVES*. ... s-parameters are simply related to power gain and
mismatch loss, quantities which are often of more interest
than the corresponding voltage functions." (emphasis mine)

The model is there. Concrete brains refuse to take a look
and instead call it "gobbledegook" (sic).

There's another model that agrees 100% with an s-parameter
analysis and it is from the field of optics, covered in
detail in _Optics_, by Hecht. Non-glare glass works the same
way as a 1/4WL matching section in a transmission line.
Again the model is there, just ignored by gurus on this
newsgroup which leads to demonstrably wrong conclusions
on their parts.

What happens to the energy in EM light waves
has been known and understood for many decades and cannot
be understood without an understanding of the laws of physics
governing interference between EM waves. Likewise, what happens
to the energy in EM RF waves cannot be understood without an
understanding of those same laws of physics.

There are many posters to r.r.a.a who have no clue about the
laws of physics governing interference between EM waves. That
ignorance is the entire problem with this discussion. Solution:
Alleviate the ignorance.

Quoting again from Roy's web page:
'ANY MODEL PRESENTED TO ACCOUNT FOR WHAT HAPPENS TO "FORWARD" AND
"REVERSE" POWER AT TRANSMISSION LINE ENDS HAD BETTER GIVE RESULTS THAT
AGREE WITH THE ABOVE TABLE.'

And, of course, the two above power/energy models agree exactly with
Roy's table but that doesn't seem to matter one iota. They are still
"gobbledegook" (still sic).
--
73, Cecil, http://www.qsl.net/w5dxp

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