Additional remark DMD - opracowanie

Additional remarks Some additional remarks on the procedure now follow.
• The stubs and the main line can be of different characteristic impedances. We
should then use three different charts, and work in normalized admittances on each.
But to transfer values from one chart to another, e.g. transferring bS2 and bS1 to
get s1 and s2, we must first un-normalize using the characteristic admittance of the
main line, and then re-normalize using the characteristic admittance of the stub
line.
• Not all values of admittance can be matched by the above tuner. As an example,
we examine the forbidden region for load admittances on the Smith Chart. We find
the result is the interior of the g = 2 circle.
• In such cases, we can insert a λ/4 section of transmission line between the load and
the tuner, and in so doing transform the load admittance to a value which is well
outside the forbidden region.
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