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:
- A horizontal dipole antenna
- B vertical ground-plane antenna
- C random length of wire
- D horizontal 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
Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.