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 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?
Which of the following is a type of OCFD antenna?
What is the effect of adding a terminating resistor to 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?
Which of the following describes 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 soil?
Which of the following describes an Extended Double Zepp antenna?
How does the radiation pattern of a horizontally polarized 3-element beam antenna vary with increasing height above 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?