Advanced Qualification · A-007 Feedlines and matching · A-007-003-007
L'adaptation d'un élément alimenté réalisée à l'aide d'un seul dispositif mécanique et capacitif réglable décrit une :
- Aadaptation en "Y"
- Badaptation "gamma"
- Cadaptation en "T"
- Dadaptation "oméga"
Correct answer: B — adaptation "gamma". Question tirée de la banque officielle d'ISDE.
Why
A gamma match uses a single adjustable rod and a capacitor to connect the coaxial cable to the driven element of an antenna, allowing you to tune the impedance without breaking the centre of the element. 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