Basic Qualification · B-006 Feedlines and antenna systems · B-006-011-009
How can the bandwidth of a Yagi antenna be increased?
- A Decrease the element spacing
- B Install loading coils in the elements
- C Use tapered elements
- D Increase the diameter of the elements
Correct answer: D — Increase the diameter of the elements. From the official ISED question bank, verified word for word.
Why
Making the metal rods thicker widens the range of frequencies the Yagi antenna can handle well. 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.