Information can be transferred through different communication channels. State one application, for each case, in which information is transferred by microwaves.
Information can be transferred through different communication channels. State one application, for each case, in which information is transferred by coaxial cables.
Information can be transferred through different communication channels. State one application, for each case, in which information is transferred by wire pairs.
A station on Earth sends a signal with initial power $3.1\,\text{kW}$ to a geostationary satellite. The attenuation of the signal received by the satellite is $190\,\text{dB}$. Calculate the power of the signal received by the satellite.
Referring to your answer in (i), state and explain what changes are made to the signal before it is transmitted back to Earth.