SignalPrep
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?

  1. AOblique
  2. BHorizontal
  3. CCircular
  4. DVertical

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

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

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