Slavko Šajić finished his B.Sc., magister and doctoral studies at the Faculty of Electrical Engineering, University of Banja Luka. His narrow research area is the field of professional radio-communications and he is engaged at following courses: Fundamentals of Telecommunications 1, Fundamentals of Telecommunications 2, Radio Communications, Radio Communications 1, Radio Communications 2, Fundamental of Radar Systems, Digital Telecommunications, Antennas and Radio Waves Propagation, Modern Telecommunications, Selected Chapters from Radio-Communications, Signal transmission in the Spread Spectrum, Fundamentals of Communications and Theory of Information