Derivation of Reflection Coefficient vs SWR
On Feb 4, 5:54*pm, Cecil Moore wrote:
Keith Dysart wrote:
Your suspicion is quite incorrect. Real-world generators
which present well defined impedances to the reflected
wave are common.
Please provide an example of an amateur radio transmitter
with a well-defined impedance seen by reflected waves.
If you had done that 30 years ago, the argument would
never have existed in the first place.
Non-sequitor. If the impedance is not well-defined,
then it is impossible to draw any conclusions about
reflections at the generator. So any claim of total
reflection in such an environment would be invalid.
And your assertion that a lack of reflections will
result in a violation of the conservation of energy
principle is also incorrect.
One cannot have one's source power and eat it too.
If the reflected energy is part of the forward energy,
it cannot also flow into the source.
I observe that you refuse to explore the example that
demonstrates that this is not an issue.
The equations you present above hold just as well
when there is no reflection at the source.
How can there be no reflection at the source when
the source is dissipating zero power?
In the example, the source is not dissipating zero
power. You should consider examining the example.
If you don't think any understanding can be gained
from examples with ideal components, please read
no further.
If those ideal components are far removed from being
realizable in the real-world, you have yourself a deal.
Until you can provide an example of a real-world source
approaching a zero real-world impedance, there is no
reason to read any further. You might as well just say,
"God causes everything." and be done with it.
Any excuse to avoid the risk of learning that your
beliefs are incorrect.
Take a chance. Try to find the flaws in the analysis
of this simplest of examples. If there are flaws,
they should not take you long to locate.
...Keith
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