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Old September 2nd 03, 02:23 AM
Cecil Moore
 
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Roy Lewallen wrote:
No, the average Poynting vector points toward the load.


That automatically says Pz- is not larger than Pz+. There are only
two component Poynting vectors, 'Pz+' forward and 'Pz-' reflected.

If so,
surely you came up with the same result, including the third power term.
If you haven't done the derivation, or if you'd like to compare your
derivation of total average power with mine, I'll be glad to post it.


Assuming coherent waves, all wave components flowing toward the load
superpose into the forward wave and all wave components flowing away
from the load superpose into the reflected wave. Since there are only
two directions, there cannot exist a third wave. If your average Poynting
vector points toward the load, Pz- cannot possibly be larger than Pz+.
But feel free to post the derivation.
--
73, Cecil http://www.qsl.net/w5dxp



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