Prof. Dr. Dr. habil. Klaus Buchner (born 1941) studied physics in Munich and obtained his "Diploma in the Physics of Elementary Particles" in Edinburgh (Scotland). From 1965 he worked at the Max Planck Institute for Physics and Astrophysics in Munich, where he received his doctorate in physics, and at the European research center CERN in Geneva. His research also took him to the universities in Kyoto (Japan) and Chandigarh (India). From 1973 until his retirement in 2006, Klaus Buchner was first a lecturer and then a professor at the Faculty of Mathematics at the Technical University of Munich. Since 1979 he has been a member of the scientific academy Accademia Peloritana dei Pericolanti in Messina, and in 1992 he received the Golden Medal of Merit from the University of Wroclaw. He has been advising mobile communications citizens' initiatives for over 20 years and now gives lectures on 5G mobile communications throughout Germany. Klaus Buchner was a Member of the European Parliament for the Ecological Democratic Party (ÖDP) from 2014 to 2020 and now lives in Munich.