This bachelor thesis covers the basics of satellite link budget calculations. Firstly, basic principles of satellite communication and overview of currently used satellite communication systems are introduced. In the theoretical part of link budget are described parameters of the satellite communication systems, which are included in the link budget calculations, such as antenna and carrier parameters. The practical part of the link budget contains simple link budget calculator for geostationary satellites. The whole bachelor thesis was created with respect of its aim – to create educational material for students.