What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed 180 degrees out of phase?
What is the radiation pattern of two 1/4 wavelength vertical antennas spaced 1/4 wavelength apart and fed 90 degrees out of phase?
What is the radiation pattern of two 1/4 wavelength vertical antennas spaced a 1/2 wavelength apart and fed in phase?
What happens to the radiation pattern of an unterminated long wire antenna as the wire length is increased?
What is an OCFD antenna?
What is the effect of a terminating resistor on a rhombic antenna?
What is the approximate feed point impedance at the center of a two-wire folded dipole antenna?
What is a folded dipole antenna?
What is a G5RV antenna?
Which of the following describes a Zepp antenna?
How is the far-field elevation pattern of a vertically polarized antenna affected by being mounted over seawater versus rocky ground?
Which of the following describes an extended double Zepp antenna?
What is the main effect of placing a vertical antenna over an imperfect ground?
How does the performance of a horizontally polarized antenna mounted on the side of a hill compare with the same antenna mounted on flat ground?
How does the radiation pattern of a horizontally polarized 3-element beam antenna vary with its height above ground?