Advanced Qualification · A-007 Feedlines and matching · A-007-001-006
Which type of network offers the greatest transformation ratio?
- AChebyshev
- BButterworth
- CL-network
- DPi-network
Correct answer: D — Pi-network. From the official ISED question bank, verified word for word.
Why
A Pi-network uses two capacitors and one inductor arranged like the Greek letter Pi to match antennas, allowing it to handle a much wider range of impedance changes than simpler circuits. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and matching is section A-007 of the Advanced exam: Feedlines and matching at the advanced level: transmission line theory, impedance transformation, stubs and matching networks.
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