About K. Ferdinand Braun
Karl Ferdinand Braun was a German applied physicist who shared the 1909 Nobel Prize in Physics with Guglielmo Marconi for their contributions to the development of radio. With his two circuit system, long range radio transmissions and modern telecommunications were made possible. His invention of the phased array antenna in 1905 led to the development of radar, smart antennas, and MIMO. Braun built the first cathode-ray tube in 1897, which led to the development of television, and the first semiconductor diode in 1874, which co-started the development of electronics and electronic engineering. In 1905, Braun invented the phased array antenna; he described in his Nobel Prize lecture how he carefully arranged three antennas to transmit a directional signal. In 1909, Braun and Marconi were jointly awarded the Nobel Prize in Physics "in recognition of their contributions to the development of wireless telegraphy"; the prize awarded to Braun depicts this design. Around 1898, he invented a crystal detector.
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