Basic Qualification · B-006 Feedlines and antenna systems · B-006-011-006
What is the major advantage of increasing element spacing on a Yagi antenna?
- A Better front-to-back ratio
- B Lower feed point impedance
- C Wider bandwidth
- D Higher gain
Correct answer: D — Higher gain. From the official ISED question bank, verified word for word.
Why
Increasing the spacing between the elements on a Yagi antenna allows the antenna to capture more of the radio wave's energy and focus it more sharply in one direction, which directly results in higher gain. 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.