Jonathan Zenneck
| Jonathan Adolf Wilhelm Zenneck | |
|---|---|
| Born |
15 April 1871 Ruppertshofen, Württemberg |
| Died | 8 April 1959 (aged 87) |
| Fields | Electrical engineering |
| Notable awards | IEEE Medal of Honor(1928) |
Jonathan Adolf Wilhelm Zenneck (15 April 1871 – 8 April 1959) was a physicist and electrical engineer. Zenneck was born in Ruppertshofen, Württemberg. Zenneck contributed to researches in radio circuit performance and to the scientific and educational contributions to the literature of the pioneer radio art. Zenneck improved the Braun cathode ray tube, by adding a second deflection structure at right angles to the first, which allowed two-dimensional viewing of a waveform. This two-dimensional display is fundamental to the oscilloscope.
In 1885, Zenneck entered the Evangelical-Theological Seminary in Maulbronn. In 1887, in a Blaubeuren seminary, Zenneck learned Latin, Greek, French, and Hebrew. In 1889, Zenneck enrolled in the Tübingen University. At the Tuebingen Seminary, Zenneck studied mathematics and natural sciences. In 1894, Zenneck took the State examination in mathematics and natural sciences and the examination for his doctor's degree.
In 1894, Zenneck conducted zoological research (Natural History Museum, London). Between 1894-1895, Zenneck served in the military.
In 1895, Zenneck left zoology and turned over to the new field of radio science, He became assistant to Ferdinand Braun and lecturer at "Physikalisches Institut" in Strasbourg, Alsace. Nikola Tesla's lectures introduced him to the wireless sciences. In 1899, Zenneck started propagation studies of wireless telegraphy, first over land, but then became more interested in the larger ranges that were reached over sea. In 1900 he started ship-to-coast experiments in the North Sea near Cuxhaven, Germany. in 1902 he conducted tests of directional antennas. In 1905, Zenneck left Strasbourg since he was appointed assistant-professor at the Danzig Technische Hochschule and in 1906, he became professor of experimental physics in the Braunschweig Technische Hochschule. Also in 1906, Zenneck wrote "Electromagnetic Oscillations and Wireless Telegraphy", the then standard textbook on the subject). In 1909, he joined Badische Anilin und Sodafabrik in Ludwigshafen to experiment with electrical discharges in air to produce bound nitrogen as fertilizer.
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