Tác giả: Peter Heymann

Dr. Peter Heymann, retired, was the Head of the Microwave Measurement Laboratory at the Ferdinand-Braun-Institut (FBH), Leibniz-Institute for High Frequency Technology in Berlin, Germany. Dr. Matthias Rudolph, is Ulrich L. Rohde Professor for RF and Microwave Techniques at Brandenburg University of Technology in Cottbus, Germany. He heads the Low-Noise components laboratory at the FBH.