On Mar 29, 12:35 pm, Cecil Moore wrote:
Keith Dysart wrote:
But truly, do look up lattice diagrams and learn the technique.
The number of problems that you will be able to solve will go
up significantly.

Since your use of it yielded erroneous results,

I am at a bit of a loss. You don't seem to have a methodology
to produce any results and yet you are sure mine are wrong.

I think
I will pass. However, it appears to be much like the
S-Parameter analysis which does yield correct results.

Feel free to apply any methodology of your choice to
predict the magnitude of the re-reflection. All information
about generator internals has been previously provided.

An S-Parameter analysis indicates that you have made an
error in the reflection coefficient, s11, looking into
the 450 ohm transmission line.

Have you computed the correct result then?

From HP's Ap-Note 95-1,
s11 is defined as the "Input reflection coefficient
with the output port TERMINATED BY A MATCHED LOAD."

You calculated your reflection coefficient with the
output port terminated by a mismatched load. There's
your conceptual error! The reflection coefficient, s11,
at the source is *NOT* the same as the reflection
coefficient at the load.

I am not sure where you are going with this. As you map
the system for s parameter evaluation, which is the two
port network that you are evaluating? The generator?
The load? The line?

Have you told anyone else that an emitter follower with
a 450 ohm resistor in the emitter circuit will eliminate
reflections on all 450 ohm transmission lines?

That is a leap that I wouldn't make. An ideal source, as
used in this example, must be able to both source and sink
current. You will need to specify more for us to determine
whether the circuit you propose will achieve that to a
sufficient degree.

....Keith