Basic Qualification · B-006 Feedlines and antenna systems · B-006-007-009
Une antenne dipôle émet une onde de polarisation verticale si:
- Aelle est trop proche du sol
- Belle est très loin du sol
- Celle est installée verticalement
- Delle est installée horizontalement
Correct answer: C — elle est installée verticalement. Question tirée de la banque officielle d'ISDE.
Why
A dipole antenna radiates a wave that matches the direction of the antenna itself, so when the antenna is mounted vertically, the electric field points up and down, creating a vertically polarized wave. 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