Week 05
Impedance Matching
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
Impedance matching transforms the input impedance toward a reference value to improve power transfer or reduce reflection. L-networks, quarter-wave transformers, and single stubs reach that goal with different elements and bandwidth behavior.
Concept map
- L-networks
- Quarter-wave transformers
- Single-stub matching
- Bandwidth
Technical anchor
For two real impedances connected by a quarter-wave section, use Zt=sqrt(Z0 ZL). An L-network or stub is selected so residual reactance or susceptance vanishes at the design frequency.
How I review it
Plan a common-frequency-axis comparison of |S11| for all three methods, evaluating not only the center-frequency match but also the width meeting a return-loss target.
Connection to the full course
Unit 5 of 12. Unit numbers arrange the saved assignments and circuits by concept flow rather than attendance weeks.