A brief history of radio communication development; Information transmission is an important part of human social life; From ancient bonfires to modern semaphores, people pursue fast and long-distance communication; 1837, morse invented the telegraph and created morse code. 1887, German scientist Hertz used a vibration; 1897, Italian scientist Marconi; Marconi won the Nobel Prize1909; 1904, British scientist Fleming won; 19 12. A brief history of the development of scientific radio communication in Britain. Information transmission is an important part of human social life. Ancient bonfires and modern semaphores are all means for people to seek rapid and long-distance communication. 1837, Morse invented the telegraph and created Morse code, which opened a new era of communication. 1865, Maxwell of Britain summarized the scientific achievements of predecessors and put forward the theory of electromagnetic waves. 1876, Bell invented the telephone, which can directly convert voice signals into electric energy and transmit it along the wires. 1887, German scientist Hertz used an oscillating dipole to generate electromagnetic waves, which directly verified the existence of electromagnetic waves for the first time in history.
1897, Italian scientist Marconi realized the transmission of long-distance radio signals on the basis of Hertz experiment. At that time, it was only 100 yards, but a year later he realized the communication between the ship and the coast. 19011February 12, Marconi gave a performance of transmitting radio signals across the Atlantic. This time he sent the signal from Cornwall, England to Newfoundland, Canada. Marconi won the Nobel Prize in 1909. Braun shared this year's Nobel Prize with him, because Brinell discovered that metal sulfide has unilateral conductivity, and this achievement can be used in radio receiving devices. 1904, British scientist Fleming obtained a patent, and described a bipolar vacuum tube for high-frequency AC rectification in the patent specification, which marked that 1906 entered the era of radio electronics. Forest, an American scientist, invented the vacuum triode, which was the first important milestone in the development history of electronic technology. ?