Extra Class

Which of the following is used to shunt feed a grounded tower at its base?

What is the purpose of using multiple driven elements connected through phasing lines?

What is the velocity factor of a transmission line?

Which of the following has the biggest effect on the velocity factor of a transmission line?

Why is the electrical length of a coaxial cable longer than its physical length?

What impedance does a 1/2-wavelength transmission line present to an RF generator when the line is shorted at the far end?

What is microstrip?

What is the approximate physical length of an air-insulated, parallel conductor transmission line that is electrically 1/2 wavelength long at 14.10 MHz?

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 impedance does a 1/4-wavelength transmission line present to an RF generator when the line is shorted at the far end?

What impedance does a 1/8-wavelength transmission line present to an RF generator when the line is shorted at the far end?

What impedance does a 1/8-wavelength transmission line present to an RF generator when the line is open at the far end?

What impedance does a 1/4-wavelength transmission line present to an RF generator when the line is open at the far end?

Which of the following can be calculated using a Smith chart?

What type of coordinate system is used in a Smith chart?

Which of the following is often determined using a Smith chart?

What are the two families of circles and arcs that make up a Smith chart?

Which of the following is a common use for a Smith chart?

How is a Smith chart normalized?