1. How does the concept of an image antenna simplify the determination of the radiation pattern of an antenna above a perfect-conductor surface?
2. Discuss the reciprocity associated with the transmitting and receiving properties of an antenna. Can you think of a situation in which reciprocity does not hold?
3. What is the receiving pattern of a loop antenna?
4. How should you orient a loop antenna to receive (a) a maximum signal and (b) a mini- mum signal?
5. Discuss the application of the directional receiving properties of a loop antenna in the location of the source of a radio signal.
6. How is the effective area of a receiving antenna defined?
7. Outline the derivation of the expression for the effective area of a Hertzian dipole.
8. Discuss the derivation of the Friis transmission formula.