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Old March 27th 07, 04:22 AM posted to rec.radio.amateur.antenna
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Default Revisiting the Power Explanation

Richard Harrison wrote:
Power is acceptable and accepted. Why avoid the term?


Jim Kelley, AC6XG, has convinced me to make the
distinction between the nature of EM energy and
the nature of EM power. Power is what exists at
a point or plane. Energy is what is moving past
the point or through the plane. Reflected power
is measured at a point. Reflected energy is
what is doing the moving past that point.

In addition, there's the difference in definitions
between the fields of RF engineering and the field
of physics. In physics, zero work implies zero power.

I am not avoiding power. I am avoiding "power waves"
and "power flow". The dimensions of power flowing past
a point would be watts/second. I don't know what physical
quantity that would represent.
--
73, Cecil http://www.w5dxp.com
 
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