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Photography of Ferdinand Braun with his signature, Photo: Deutsches Museum, Munich. 

Photography of Ferdinand Braun with his signature, Photo: Deutsches Museum, Munich. 

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Conference Paper
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In 1909 Ferdinand Braun and Guglielmo Marconi jointly received the Nobel Prize for their groundbreaking contributions to wireless telegraphy. Beyond numerous important contributions to wireless transmitter and receiver circuit technology Ferdinand Braun has given other epoch-making contributions to electronics and wireless technology, including the...

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Context 1
... already had performed wireless transmission over 50 km, however, this required a large transmitter power. Figure 10 a shows various arrangements of the tightly coupled primal Marconi transmitter. In all three cases the spark gap excited by a Ruhmkorff induction coil S is directlycon- nected to antenna and ground. ...
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... all three cases the spark gap excited by a Ruhmkorff induction coil S is directlycon- nected to antenna and ground. In Figure 10 a1 the transmitter exhibits only an antenna wire. As in the Hertzian arrangement from 1886 the steep transients of the spark discharges excite eigenoscillations of the antenna wire. ...
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... in the Hertzian arrangement from 1886 the steep transients of the spark discharges excite eigenoscillations of the antenna wire. In Figure 10 a2 a plate on the top of the antenna wire is added, providing a capacitive load. In Figure 10 a3 the Hertzian spark gap is replaced by the so-called Righi oscillator, a system with three sparks, where the oscillating discharge in the center does not take place in the air. ...
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... Figure 10 a2 a plate on the top of the antenna wire is added, providing a capacitive load. In Figure 10 a3 the Hertzian spark gap is replaced by the so-called Righi oscillator, a system with three sparks, where the oscillating discharge in the center does not take place in the air. This arrangement yielded no improvement. ...
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... to B.W. Feddersen this could be achieved using capacitors [51], [52]. Therefore Ferdinand Braun has chosen an arrangement according to Figure 10 b where he could distribute the two tasks, generation of oscillation and radiation over two circuits. The loose coupling between the spark-gap oscillator and the antenna yielded lower damping, a narrower spectral width of the radiated pulses and higher power efficiency. ...
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... patented transceiver with coupled resonant circuits (DR Patent Nr. 111578, October 14, 1898) [53]- [55]. Figure 11 shows a replica of the closed resonant circuit with air trans- former after Ferdinand Braun from year 1898 [54]. ...
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... time response in the pimary and secondary coils of Braun's coupled transmitter are depicted in Figure 12 [51]. The transient shows the superposition of two attenuated eigen- oscillations according to the two resonant frequencies of the coupled system. ...
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... components delivered by Schuckert in Septem- ber 1900 a distance of 62 km could be bridged. Figure 13 shows the components of the first wireless transmission system Cuxhaven -Helgoland. In the meantime Adolph Slaby was working for AEG (Allgemeine Elektricitätsgesellschaft) [57]. ...

Citations

... The birth of electronics can be dated to the year 1874 when Ferdinand Braun discovered at the University of Würzburg the unipolar conduction of metal-semiconductor junctions [3]. In the paper with the title "Ueber die Stromleitung durch Peter Russer is with the Institute of Nanoelectronics of the Technische Universität München, 80333, Munich, Germany, Email: russer@tum.de ...
Conference Paper
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After a short overview over the development of semiconductor electronics from its beginning to today, the present tendencies in the development of nanoelectronics is discussed. Nanoelectronics can be defined as electronics with dimensions of less than 0.1 micron. Nanoelectronics comprises the down-scaling of semiconductor devices to structure dimensions below 100 nanometer as well as novel nanoelectronic devices based on novel materials and device concepts, including carbon based devices, magnetic and spintronic devices, molecular electronics and superconducting electronics. Since further down-scaling of the circuits will soon reach technological and cost limits, completely novel technological approaches are of interest. We discuss these novel device concepts. The key role of nanoelectronics in the dawn of the fourth industrial revolution is discussed.
... This presentation is based on the earlier publications [26], [27]. It has been the achievement of Friedrich Kurylo, having written the first biography of Ferdinand Braun [25]. ...
Conference Paper
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Ferdinand Braun has given epoch-making contributions to electronics and wireless technology, including the discovery of the rectifying properties of a metal--semiconductor junction in 1874, the invention of the cathode ray tube (Braunsche Röhre) in 1897, and the introduction of coupled resonant circuits in wireless transmitters in 1898. In 1909 Ferdinand Braun and Guglielmo Marconi jointly received the Nobel Prize for their groundbreaking contributions to wireless telegraphy. Ferdinand Braun has given the impact to the foundation of "Hartmann & Braun" and "Telefunken" and had a considerable influence on the industrial development of German wireless technology.
... In 1899, he developed a sensitive "iron-mercury-iron" coherer. Later on, he used a galena detector in his receiver, making use of the rectification properties of contacts between a metal and sulfites -discovered in 1874 in Strasburg by professor Karl Ferdinand Braun (1850-1918) [18]. Bose's detector was the forerunner of semiconductor junctions -widely used later on in diodes and transistors -and Bose obtained a patent for it in 1904 [19,20]. ...
Article
Many scientists and engineers contributed - more or less successfully - to the development of radio and wireless. This historical survey describes briefly the projects realized more than a century ago by some of them, at the early beginnings of wireless. It is hoped, in this manner, to draw attention to the unknown or forgotten researchers who built up the considerable body of knowledge that led to Marconi's remarkable achievements. © 2011 Cambridge University Press and the European Microwave Association.
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