Basic Qualification · B-006 Feedlines and antenna systems · B-006-007-006
An isotropic antenna is:
- A a half-wave reference dipole
- B a hypothetical point source
- C an infinitely long piece of wire
- D a dummy load
Correct answer: B — a hypothetical point source. From the official ISED question bank, verified word for word.
Why
An isotropic antenna is a theoretical concept, not a real device you can build; it is imagined as a tiny point in space that radiates radio waves equally in every direction. The full explanation — and one for every question — is in Pro.
Practise this section
Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.