Basic Qualification · B-006 Feedlines and antenna systems · B-006-011-002
Quelle est la longueur approximative de l'élément alimenté d'une antenne Yagi syntonisée à 14 MHz?
- A10,21 mètres
- B5,09 mètres
- C10,71 mètres
- D21,43 mètres
Correct answer: A — 10,21 mètres. Question tirée de la banque officielle d'ISDE.
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
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