[Amps] Does coax loss depend on SWR?

[Randy]

Thanks Steve and John for the info and explanation...

de Randy, W7HR
Port Orchard, WA


********************************************


-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of JMLTINC at aol.com
Sent: Friday, February 29, 2008 11:41 AM
To: amps at contesting.com
Subject: Re: [Amps] Does coax loss depend on SWR?

All along the coax (with  SWR > 1:1) the forward and reflected voltage and 
current components add  vectorially. The vector sum of each component
(voltage 
and current) is that of  the forward and reflected components and the phase 
difference between them. The  resultant voltage or current is always higher
than 
the incident wave component  value.
 
As the coax has both conductor  (I squared R) and dielectric (E squared / R)

losses, the increase in  voltage and current in the coax relate to increased

loss within the coax. And,  as all the reflected power is not absorbed by
the 
load on its return trip and  re-reflected, even more power is still lost
with 
each  trip.
 
-John,  N9RF



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