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 portable VHF/UHF "halo" antenna?
What is the primary purpose of antenna traps?
What is an advantage of vertical stacking of 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 1/3 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 the combined vertical and horizontal polarization pattern of a multi-wavelength, horizontal loop antenna?