SignalPrep
Basic Qualification · B-006 Feedlines and antenna systems · B-006-008-009

Si la fréquence de résonance d'une antenne est trop élevée, l'opérateur peut abaisser cette fréquence en:

  1. Aallongeant la ligne de transmission
  2. Ballongeant l'antenne
  3. Craccourcissant l'antenne
  4. Dutilisant un fil de plus petit diamètre

Correct answer: B — allongeant l'antenne. Question tirée de la banque officielle d'ISDE.

Why

An antenna acts like a tuning fork for radio waves, where its physical size determines the pitch, or frequency, it naturally sings. 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

This question in English · All B-006 questions