Lecture
This lecture covers the Doppler effect and its application in radar systems, explaining how the frequency of a wave changes when the source or receiver is in motion. It also discusses examples of Doppler radar calculations, such as determining the frequency shift for moving sources. Furthermore, it delves into the principles of radar systems, including the concept of attenuation in free space and the Friis' formula for calculating received power. The lecture concludes with a focus on diffraction phenomena, exploring how obstacles affect wave propagation and introducing the concept of Fresnel ellipsoids. Finally, it touches on satellite communication, explaining Kepler's laws and providing insights into geostationary satellites.