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We try to match the input of the amplifier with a from a 50 termination.
The matching network design procedures
- Locate normalised admittance for on the Smith chart as point . Since
. The normalised admittance should be at .
- With a section of 50 line, convert the admittance until it has unity normalised
conductance, point A as the Figure shown, i.e. Transfer the admittance, toward the source, until it meets the unity
- Add a parallel open-circuit stub section to provide the required susceptive part, i.e., Transfer
from open-circuit to point B, toward the generator.
Figure 21: Input matching design with the aid of Smith chart
Figure 22: Complete circuit layout
With , , . The unilateral
transducer power is . We can compare this gain with the case where
the input and output are conjugately matched, i.e., and .
Note that the difference is very small.