Basic Qualification · B-003 Station assembly, practice and safety · B-003-021-010
Why should directional high-gain antennas be mounted higher than nearby structures?
- A So they will not direct RF energy toward people in nearby structures
- B So static electricity buildup is minimized
- C So they will not damage nearby structures with RF energy
- D So they will receive more sky waves fewer ground waves
Correct answer: A — So they will not direct RF energy toward people in nearby structures. From the official ISED question bank, verified word for word.
Why
High-gain antennas focus radio waves into a tight beam, much like a flashlight concentrates light. The full explanation — and one for every question — is in Pro.
Practise this section
Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.