Basic Qualification · B-006 Feedlines and antenna systems · B-006-013-010
The quad antenna consists of two or more square loops of wire. The driven element has an approximate overall length of:
- Aone wavelength
- Bthree quarters of a wavelength
- Ctwo wavelengths
- Done half wavelength
Correct answer: A — one wavelength. From the official ISED question bank, verified word for word.
Why
A quad antenna uses a square loop as its driven element, and the total length of wire around that square must equal one full wavelength to resonate properly. 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