Antennas and Feed Lines

Common Math Problems in General Class Exam

Master the mathematical concepts you'll encounter on the General Class exam. Includes formulas, examples, and practice tips for electrical calculations.

Which of the following describes a G5RV antenna?

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

Which of the following describes a Zepp antenna?

What happens as the Q of an antenna increases?

What is the purpose of the series capacitor in a gamma match?

How does parallel conductor transmission line compare to coaxial cable with a plastic dielectric?

Which of the following is a significant difference between foam dielectric coaxial cable and solid dielectric coaxial cable, assuming all other parameters are the same?

What third family of circles is often added to a Smith chart during the process of designing impedance matching networks?

Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?

What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

What is a beta or hairpin match?

What is antenna gain?

What is an isotropic radiator?

Which of the following determines ground losses for a ground-mounted vertical antenna operating on HF?

What type of analysis is commonly used for modeling antennas?

What is the principle of a Method of Moments analysis?

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