Advanced Qualification · A-007 Feedlines and matching · A-007-003-007
The matching of a driven element with a single adjustable mechanical and capacitive arrangement is descriptive of:
- A an "omega" match
- B a "Y" match
- C a "gamma" match
- D a "T" match
Correct answer: C — a "gamma" match. From the official ISED question bank, verified word for word.
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 at the advanced level: transmission line theory, impedance transformation, stubs and matching networks.