Basic Qualification · B-006 Feedlines and antenna systems · B-006-013-008
Moving the feed point of a quad antenna from a side parallel to the ground to a side perpendicular to the ground will have what effect?
- A It will significantly decrease the antenna feed point impedance
- B It will significantly increase the antenna feed point impedance
- C It will change the antenna polarization from horizontal to vertical
- D It will change the antenna polarization from vertical to horizontal
Correct answer: C — It will change the antenna polarization from horizontal to vertical. From the official ISED question bank, verified word for word.
Why
A quad antenna radiates with the same polarization as the wire where the feed point sits. 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.