1. For your first post: Describe the principle of how antennas work, and the different types of antennas that produce or receive EM waves.
2. What is the principle that the radio and TV receivers use to pick up and then amplify weak electromagnetic waves, while rejecting all others not at their resonant frequency?
3. For your second post, apply your knowledge gained in this module and answer the following:
4. A 2.50-m-diameter university communications satellite dish receives TV signals that have a maximum electric field strength (for one channel) of7.50V/m. What is the intensity of this wave? What is the power received by the antenna? (c) If the orbiting satellite broadcasts uniformly over an area of1.5010^13m^2,how much power does it radiate?