Basic Qualification · B-006 Feedlines and antenna systems · B-006-007-010
If an electromagnetic wave leaves an antenna vertically polarized and reaches the receiving location by ground wave, what will be its final polarization?
- A Oblique
- B Horizontal
- C Circular
- D Vertical
Correct answer: D — Vertical. From the official ISED question bank, verified word for word.
Why
A ground wave travels along the Earth's surface, and the ground acts like a mirror that preserves the original orientation of the signal. 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.