Advanced Qualification · A-007 Feedlines and matching · A-007-003-003
What term describes a method of antenna impedance matching that uses a short section of transmission line connected to the antenna transmission line near the antenna and perpendicular to the transmission line?
- A The gamma match
- B The stub match
- C The omega match
- D The delta match
Correct answer: B — The stub match. From the official ISED question bank, verified word for word.
Why
A stub match works by attaching a short, perpendicular piece of transmission line near the antenna to cancel out unwanted electrical effects and balance the signal flow. 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.