Week 04
Reading the Smith Chart
I revisit transmission lines through Wilkinson and branch-line networks using my assignments, Cadence circuits, and S-parameter figures.
What I connect in this unit
The Smith chart maps normalized impedance onto the reflection-coefficient plane. Constant-resistance circles and reactance arcs locate the load, while admittance conversion and line rotation support series or shunt matching.
Concept map
- Normalized impedance
- Admittance conversion
- Constant-resistance circles
- Line rotation
Technical anchor
Plot z=Z/Z0 and rotate 180 degrees about the chart center to obtain y=1/z. Along a lossless line, motion toward the load and generator follows opposite directions on the constant-|Γ| circle.
How I review it
Compare the chart point with Γ calculated algebraically, and verify that the wavelength-scale rotation corresponds to the 2βl change in reflection phase.
Connection to the full course
Unit 4 of 12. Unit numbers arrange the saved assignments and circuits by concept flow rather than attendance weeks.