Extra Class

How much gain does an antenna have compared to a half-wavelength dipole if it has 6 dB gain over an isotropic radiator?

What is the difference in radiated power between a lossless antenna with gain and an isotropic radiator driven by the same power?

What is the far field of an antenna?

What type of analysis is commonly used for modeling antennas?

What is the principle of a Method of Moments analysis?

What is a disadvantage of decreasing the number of wire segments in an antenna model below 10 segments per half-wavelength?

What type of radiation pattern is created by two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed 180 degrees out of phase?

What type of radiation pattern is created by two 1/4-wavelength vertical antennas spaced 1/4-wavelength apart and fed 90 degrees out of phase?

What type of radiation pattern is created by 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?

What is the purpose of feeding an off-center-fed dipole (OCFD) between the center and one end instead of at the midpoint?

What is the effect of adding a terminating resistor to a rhombic or long-wire antenna?

What is the approximate feed point impedance at the center of a two-wire half-wave 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 antenna vary with increasing height above ground?

How does the radiation pattern of a horizontally-polarized antenna mounted above a long slope compare with the same antenna mounted above flat ground?