Advanced Qualification · A-007 Feedlines and matching · A-007-004-003
Le point d'alimentation d'une antenne demionde alimentée en son centre se situe à l'endroit où :
- Ala tension est maximale
- Ble courant est maximal
- Cle courant est minimal
- Dla tension et le courant sont minimaux
Correct answer: B — le courant est maximal. Question tirée de la banque officielle d'ISDE.
Why
In a centre-fed half-wave antenna, the feed point sits right in the middle where the electrical current flows most strongly, making it the spot of maximum current. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and matching is section A-007 of the Advanced exam: Feedlines and matching at the advanced level: transmission line theory, impedance transformation, stubs and matching networks.
Drill A-007 — free, no account