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?
- A Between the antenna and the ground
- B Between the coaxial cable and the ground
- C Between the coaxial cable and the antenna
- D Between 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
Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.