Basic Qualification · B-006 Feedlines and antenna systems · B-006-009-010
Le gain d'une antenne, particulièrement en VHF et aux fréquences plus élevées, est mesuré en dBi. Le "i" de cette expression signifie:
- Aintégral
- Bionosphérique
- Cinterpolé
- Disotrope
Correct answer: D — isotrope. Question tirée de la banque officielle d'ISDE.
Why
The "i" in dBi stands for isotropic, which describes a theoretical antenna that radiates power equally in every direction like a perfect sphere. 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