General exam question G9D06
Subelement G9, ANTENNAS AND FEED LINES· Group G9D
Which of the following is an advantage of a log-periodic antenna?
- A.Wide bandwidth (correct answer)
- B.Higher gain per element than a Yagi antenna
- C.Harmonic suppression
- D.Polarization diversity
WhyAn advantage of a log-periodic antenna is wide bandwidth. A log-periodic antenna's self-similar, frequency-scaled element geometry lets it maintain reasonably consistent performance across a very wide range of frequencies, giving it notably wide bandwidth compared to a narrowband design like a Yagi, answer A. It doesn't typically deliver higher gain per element than a Yagi, isn't specifically valued for harmonic suppression, and doesn't offer polarization diversity, so B, C, and D are wrong.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2023-2027 NCVEC Element 3 pool (public domain); the explanation above is original writing, see our methodology.
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