T9A - Antennas and feed lines
Technician Class
Antennas: vertical and horizontal polarization, concept of antenna gain, definition and types of beam antennas, antenna loading, common portable and mobile antennas, relationships between resonant length and frequency, dipole pattern
11 questions | Updated: Feb 19, 2026
What is a beam antenna?
Which of the following describes a type of antenna loading?
How is the polarization of an antenna described?
What is a disadvantage of a handheld radio transceiver’s short flexible antenna compared to a full-sized quarter-wave antenna?
Which of the following increases the resonant frequency of a dipole antenna?
Which of the following types of antennas offers the greatest gain?
What is a potential drawback of using a handheld VHF transceiver inside a vehicle that lacks an externally mounted antenna?
Why is a 19-inch-long vertical antenna often used on 2 meters?
What is an advantage of a 5/8-wavelength whip antenna for VHF or UHF mobile service compared to a 1/4-wave antenna?
In which direction does a half-wave dipole antenna radiate the strongest signal?
What is antenna gain?