Basic Qualification · B-006 Feedlines and antenna systems · B-006-002-004
What is the purpose of a balun?
- AShunt common-mode current to ground
- BBalance antenna impedance
- CConnect balanced and unbalanced systems
- DIncrease antenna gain
Correct answer: C — Connect balanced and unbalanced systems. From the official ISED question bank, verified word for word.
Why
A balun, short for balanced to unbalanced, exists to join two different kinds of circuits: a balanced line like ladder line and an unbalanced line like coaxial cable. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and antenna systems is section B-006 of the Basic exam: Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.
Drill B-006 — free, no account