Basic Qualification · B-006 Feedlines and antenna systems · B-006-007-008
VHF signals from a mobile station using a vertical whip antenna will normally be best received using a:
- Ahorizontal dipole antenna
- Bvertical ground-plane antenna
- Crandom length of wire
- Dhorizontal ground-plane antenna
Correct answer: B — vertical ground-plane antenna. From the official ISED question bank, verified word for word.
Why
A vertical ground-plane antenna matches the vertical whip on your mobile station because both radiate signals with the same polarization, meaning the electric field points up and down. 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