Basic Qualification · B-006 Feedlines and antenna systems · B-006-008-006
On peut augmenter la fréquence de résonance d'une antenne en:
- Aallongeant l'élément rayonnant
- Braccourcissant l'élément rayonnant
- Cdiminuant la hauteur de l'élément rayonnant
- Daugmentant la hauteur de l'élément rayonnant
Correct answer: B — raccourcissant l'élément rayonnant. Question tirée de la banque officielle d'ISDE.
Why
Shortening the radiating element makes the antenna physically smaller, which causes it to resonate at a higher pitch, or frequency. 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