Basic Qualification · B-006 Feedlines and antenna systems · B-006-003-003
Why do most amateur radio antenna systems use coaxial cable, rather than other types of transmission line?
- A Less loss
- B More power handling capability
- C Less expensive
- D More usable in a wide variety of settings
Correct answer: D — More usable in a wide variety of settings. From the official ISED question bank, verified word for word.
Why
Coaxial cable works well in almost any location because its outer shield keeps signals inside and blocks outside interference, allowing it to run through walls, around corners, or near metal without needing special spacing. 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.