Basic Qualification · B-006 Feedlines and antenna systems · B-006-011-006
Quel est le principal avantage d'augmenter l'espacement des éléments sur une antenne Yagi?
- AUn meilleur rapport avant/arrière
- BUne impédance au point d'alimentation plus basse
- CUne largeur de bande plus grande
- DUn gain plus élevé
Correct answer: D — Un gain plus élevé. Question tirée de la banque officielle d'ISDE.
Why
Increasing the spacing between the elements on a Yagi antenna allows the antenna to capture more of the radio wave's energy and focus it more sharply in one direction, which directly results in higher gain. 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