Advanced Qualification · A-007 Feedlines and matching · A-007-005-001
What is meant by circularly polarized electromagnetic waves?
- AWaves produced by a circular loop antenna
- BWaves with a rotating electric field
- CWaves with an electric field bent into circular shape
- DWaves that circle the earth
Correct answer: B — Waves with a rotating electric field. From the official ISED question bank, verified word for word.
Why
Circular polarization happens when the electric field of a radio wave spins around as it travels forward, much like a corkscrew moving through space. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and matching is section A-007 of the Advanced exam: Feedlines and matching at the advanced level: transmission line theory, impedance transformation, stubs and matching networks.
Drill A-007 — free, no account