Basic Qualification · B-006 Feedlines and antenna systems · B-006-004-008
In what values are RF transmission line losses expressed?
- AOhms per MHz
- BDecibel per MHz
- COhms per metre
- DDecibel per unit length
Correct answer: D — Decibel per unit length. From the official ISED question bank, verified word for word.
Why
RF transmission line losses are expressed as Decibel per unit length because signal strength drops as the wave travels along the cable, and this drop is measured in decibels for every specific distance, such as per metre or per hundred feet. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and antenna systems is section B-006 of the Basic exam: Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.
Drill B-006 — free, no account