Advanced Qualification · A-007 Feedlines and matching · A-007-001-007
Why is an L-network of limited utility in impedance matching?
- A It matches only a small impedance range
- B It is thermally unstable
- C It is prone to self-resonance
- D It has limited power handling capability
Correct answer: A — It matches only a small impedance range. From the official ISED question bank, verified word for word.
Why
An L-network uses just two components, which limits its ability to transform impedances; it works well only when the starting and target values are relatively close, failing when the mismatch is too large. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and matching at the advanced level: transmission line theory, impedance transformation, stubs and matching networks.