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Communication-System-at-a-Glance

By Ashik

 
Historical review
•Early history of communication

•1799 Alessandro Volta invented electric battery,
•1837 Samuel Morse demonstrated telegraph and 1844 first telegraph line (Washington-Baltimore) became operational
•Early history of wireless communication
•1831 Faraday demonstrates electromagnetic induction
•J. Maxwell (1831-79): theory of electromagnetic Fields, wave equations (1864)
•H. Hertz (1857-94): demonstrates with an experiment the wave character of electrical transmission through space(1888, in Karlsruhe,Germany, at the location of today’s University of Karlsruhe)
 


 
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Historical review
  •    Early history of wireless communication I
  •     1895 Guglielmo Marcon
  •     first demonstration of wireless telegraphy (digital!)
  •     long wave transmission, high  transmission power necessary (> 200kw)





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