Advanced Qualification · A-007 Feedlines and matching · A-007-001-001
For an antenna tuner of the "Transformer" type, which of the following statements is FALSE?
- A The output is suitable for impedances from low to high
- B The circuit is known as a transformer-type antenna tuner
- C The circuit is known as a Pi-type antenna tuner
- D The input is suitable for 50 ohm impedance
Correct answer: C — The circuit is known as a Pi-type antenna tuner. From the official ISED question bank, verified word for word.
Why
Saying the circuit is known as a Pi-type antenna tuner is the false statement because a transformer-type tuner uses coils and taps to match impedances, while a Pi-type uses two capacitors and an inductor shaped like the Greek letter Pi. 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.