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Old January 22nd 08, 01:14 PM posted to rec.radio.amateur.antenna
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Default Poynting Vector in Standing Waves

Gene Fuller wrote:
In order to support his point about using phasors interchangeably with
field vectors, Cecil copied and posted a figure on his website under the
page name of "EHWave.jpg".


For the record, I have not used field vectors at all
during this discussion. Everything I have ever posted
have used phasors. From the IEEE Dictionary, "E and H
are the electric and magnetic field vectors in phasor
notation". That is what I have been doing all along.

From "Optics" by Hecht: "Therefore, its instantaneous
value [for the Poynting vector] would be an impractical
quantity to measure directly. This suggests that we
employ an averaging procedure." Virtually every time
I have used the term, "Poynting vector", I have been
talking about the average value, not the instantaneous
value.

EHWave.JPG is a good representation of an EM traveling
wave in phasor notation. If we project the fields onto
the real axis, we obtain the conventional representation.
--
73, Cecil http://www.w5dxp.com
 
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