Advanced Qualification · A-007 Feedlines and matching · A-007-005-006
Lequel des montages suivants N'EST PAS une façon d'illuminer un réflecteur parabolique?
- AExcitation décalée
- BExcitation Cassegrain
- CExcitation Newton
- DExcitation frontale
Correct answer: C — Excitation Newton. Question tirée de la banque officielle d'ISDE.
Why
Newtonian is the right choice because it describes a telescope design for visible light, not a method for feeding radio waves to a parabolic dish antenna. 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