Advanced Qualification · A-007 Feedlines and matching · A-007-003-011
A Yagi antenna uses a gamma match. The variable capacitor connects to the:
- A adjustable gamma rod
- B an adjustable point on the director
- C center of the driven element
- D coaxial line braid
Correct answer: A — adjustable gamma rod. From the official ISED question bank, verified word for word.
Why
The variable capacitor in a gamma match connects directly to the adjustable gamma rod, which acts as a movable tap point to fine-tune the antenna's impedance. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and matching at the advanced level: transmission line theory, impedance transformation, stubs and matching networks.