General Class

What does “front-to-back ratio” mean in reference to a Yagi antenna?

What is meant by the “main lobe” of a directive antenna?

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?

What is a beta or hairpin match?

Which of the following is a characteristic of using a gamma match with a Yagi antenna?

Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?

What is the feed point impedance of an end-fed half-wave antenna?

In which direction is the maximum radiation from a VHF/UHF “halo” antenna?

What is the primary function of antenna traps?

What is an advantage of vertically stacking horizontally polarized Yagi antennas?

Which of the following is an advantage of a log-periodic antenna?

Which of the following describes a log-periodic antenna?

How does a “screwdriver” mobile antenna adjust its feed point impedance?

What is the primary use of a Beverage antenna?

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

Which of the following is a disadvantage of multiband antennas?

What is the common name of a dipole with a single central support?

What is one way that RF energy can affect human body tissue?

Which of the following is used to determine RF exposure from a transmitted signal?