73·STUDY

General exam question G9D10

Subelement G9, ANTENNAS AND FEED LINES· Group G9D

G9D10

In which direction or directions does an electrically small loop (less than 1/10 wavelength in circumference) have nulls in its radiation pattern?

  • A.In the plane of the loop
  • B.Broadside to the loop (correct answer)
  • C.Broadside and in the plane of the loop
  • D.Electrically small loops are omnidirectional

WhyAn electrically small loop antenna has nulls in its radiation pattern broadside to the loop. An electrically small loop antenna has a figure-eight pattern with its nulls pointing broadside to the loop, perpendicular to the loop's plane, while it radiates best in the plane of the loop itself, answer B. The nulls aren't in the plane of the loop (that's where it radiates best), it isn't null in both directions at once, and it definitely isn't omnidirectional, that's the opposite of what makes a small loop useful for direction finding, so A, 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.

Drill G9 in practice mode →All G9 questions →

Related questions