5. Electromagnetics and Photonics
Antenna Theory — Quiz
Test your understanding of antenna theory with 5 practice questions.
Practice Questions
Question 1
What is the approximate feed-point impedance of a center-fed half-wave dipole in free space?
Question 2
What device is used to convert between a balanced antenna and an unbalanced transmission line while also aiding in impedance matching?
Question 3
An antenna draws 50 W of input power and radiates 40 W. What is its radiation efficiency?
Question 4
A parabolic dish antenna has a fixed diameter. If the operating frequency is doubled, how does its gain change?
Question 5
For an infinitesimal electric dipole, in which direction is the radiation intensity maximum?