Alexander Meissner
Alexander Meissner ( sometimes spelled with ss) ( born 14 September 1883 in Vienna, † January 3, 1958 in Berlin) was an Austrian physicist. He was known by the development of feedback to produce undamped electromagnetic waves and is considered the cornerstone laying of broadcasting technology. He is the inventor of the famous Meissner circuit.
Life
Alexander Meissner was born on 14 September 1883 in Vienna, where he attended the High School Döblinger. He then studied at the Technical University of Vienna (now Vienna University of Technology ) engineering. A short time he was an assistant at this university. He received his doctorate in 1902. At 24 he went to Telefunken in Berlin. As part of his research he received numerous honors were bestowed. Numerous scientific teams appointed him an honorary member.
Alexander Meissner died on 3 January 1958 at the age of 75 in Berlin. There he is in the forest cemetery buried.
Life's work
Before Meissner's invention could be radio frequency for wireless telegraphy only with machine transmitters ( large radio station Nauen ) or with spark gap transmitters, also called pop radio transmitters generate. For the transmission of speech or music, these techniques were not suitable, and the available frequency spectrum for the operation was likely only a few stations.
1913 Meissner put the feedback principle in such a way that a circuit could be made from vacuum tubes to self oscillate at a certain frequency. The resulting undamped electromagnetic vibrations are the basis for today's communication in broadcasting, radio, television, telephony and information technology, which would not be possible without Meissner invention.
Edwin Howard Armstrong Somewhat later developed in New York, a similar system, which had pro-cesses.
The then young company Telefunken gave Meissner during which almost fifty years as a researcher the opportunity for research and development in other areas. Meissner achieved basic knowledge in the sector antennas, frequency stabilization by crystals, but also in heat-conductive insulating materials, precursors of silicones.
Siemens & Halske built on the results of Meissner's a long wave diathermy, the first medical application of high frequency, which was largely distributed soon.