E9H - Antennas and Transmission Lines
Extra Class
Practical antenna systems: ground systems, radials, elevated radials
11 questions
When constructing a Beverage antenna, which of the following factors should be included in the design to achieve good performance at the desired frequency?
Which is generally true for 160- and 80-meter receiving antennas?
What is receiving directivity factor (RDF)?
What is the purpose of placing an electrostatic shield around a small-loop direction-finding antenna?
What challenge is presented by a small wire-loop antenna for direction finding?
What indicates the correct value of terminating resistance for a Beverage antenna?
What is the function of a Beverage antenna’s termination resistor?
What is the function of a sense antenna?
What type of radiation pattern is created by a single-turn, terminated loop such as a pennant antenna?
How can the output voltage of a multiple-turn receiving loop antenna be increased?
What feature of a cardioid pattern antenna makes it useful for direction-finding antennas?