Basic Qualification · B-006 Feedlines and antenna systems · B-006-011-002
What is the approximate length of the driven element of a Yagi antenna for 14.0 MHz?
- A 10.21 metres
- B 5.09 metres
- C 10.71 metres
- D 21.43 metres
Correct answer: A — 10.21 metres. From the official ISED question bank, verified word for word.
Why
At 14.0 MHz, a Yagi antenna's driven element is roughly half a wavelength long. 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.