Thread: Derivation of Reflection Coefficient vs SWR
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Old January 25th 08, 09:18 PM posted to rec.radio.amateur.antenna
Cecil Moore[_2_] Cecil Moore[_2_] is offline
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Default Derivation of Reflection Coefficient vs SWR
Roger Sparks wrote:
If the steady-state forward power is 200 watts,
the reflected power is 100 watts, and the lossless
transmission line is one microsecond long, it
contains 300 microjoules of energy. I don't
think that is a sheer coincidence. :-)

Yep, and if we quickly replaced the source with a termination having the impedance of the transmission line, 100 watts of power would continue to be delivered to the load for one microsecond, delivering 100 microjoules of energy. 100 watts of power would be delivered to the reflected wave termination for two microseconds, delivering 200 microjoules of energy.

Can we consider the old wives' tale of no energy in reflected
waves to be laid to rest?
--
73, Cecil http://www.w5dxp.com
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