Basic Qualification · B-006 Feedlines and antenna systems · B-006-006-010
Why is an antenna tuner (external or internal) frequently used with modern solid-state transceivers?
- A It enables the transceivers to deliver rated power to a mismatched antenna system
- B It reduces losses in the line to the antenna
- C It reduces common-mode noise pickup
- D It absorbs the reflected energy from a mismatched antenna system
Correct answer: A — It enables the transceivers to deliver rated power to a mismatched antenna system. From the official ISED question bank, verified word for word.
Why
Modern solid-state transceivers automatically reduce their output power when they detect a mismatch between the radio and the antenna, which happens when the standing wave ratio is high. The full explanation — and one for every question — is in Pro.
Practise this section
Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.