Skip to main content

G9B03:Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?

G9B03G9B

Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?

Direct answer summary (2023-2027 NCVEC pool)

The official correct answer for G9B03 is Omnidirectional in azimuth.

The key fact is Omnidirectional in azimuth. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

← G9B02G9B04 →

More questions in G9B

G9B01What is a characteristic of a random-wire HF antenna connected directly to the transmitter?G9B02Which of the following is a common way to adjust the feed point impedance of an elevated quarter-wave ground-plane vertical antenna to be approximately 50 ohms?G9B04What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?G9B05How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?G9B06Where should the radial wires of a ground-mounted vertical antenna system be placed?G9B07How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?