Basic Qualification · B-006 Feedlines and antenna systems · B-006-002-005
Where would you install a balun to feed a dipole antenna with 50-ohm coaxial cable?
- ABetween the antenna and the ground
- BBetween the coaxial cable and the ground
- CBetween the coaxial cable and the antenna
- DBetween the transmitter and the coaxial cable
Correct answer: C — Between the coaxial cable and the antenna. From the official ISED question bank, verified word for word.
Why
A balun sits between the coaxial cable and the antenna to stop unwanted currents from flowing on the outside of the cable shield, which can distort your signal pattern. 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