In 1844, the telegraph was invented, which could communicate with each other at a distance, but it still had to rely on "wires" to connect. The reception and transmission of radio signals are "radio communication"; The whole history of the invention of radio communication is the result of research and invention by many scientists.
in 1888, the German scientist Heinrich Hertz discovered the existence of radio waves.
in 1895, the Soviet physicist Alexander Stepanovitch Popov claimed that he had successfully received and sent radio signals in two places 6 yards apart.
later in the same year, Guglielmo Marconi, the 21-year-old son of a wealthy Italian landlord, successfully made his first launch by radio waves in his father's manor land.
in 1897, Popov successfully communicated with the land platform on the navy cruiser with the wireless communication equipment he made.
Marconi sent radio waves across the Atlantic in 191.
in 196, the Canadian inventor Fessenden first emitted "sound", and radio broadcasting began.
in the same year, American Lee de Forest invented vacuum tube, which was the ancestor of vacuum tube radio.
Since then, there have been improved transistor radio (atomic particle radio) and transistor radio.
Actually, there is a debate about the inventor of the radio. Some people say it's Popov, others say it's Marconi. Alexander Stepanov itch Popov (1859-196), a Russian physicist, was born in Russia in 1859, the son of a priest. Since 1885, I have devoted myself to studying radio communication, following in the footsteps of predecessors maxwell and Hertz. In a speech on May 7, 1895, he published his research results of successfully transmitting and receiving radio signals after improving the receiver in Lodge. Since 191, he has been a professor of physics at St. Petersburg University; Some people think that he is the one who really invented the radio, but perhaps because he is a scholar and is too absorbed in academic research, the invention of the radio has not been widely known to the world; Perhaps it was because Popov's invention was considered as a great weapon in the military by the Soviet Navy and was classified and kept secret. On the contrary, Marconi is very business-minded. It is said that he set up the world's first radio factory and obtained a patent right. However, some people criticized that the radio he made only combined other people's inventions-Hertz's coil antenna, Lodge's tuner and receiver, and Nikola Telsa's spark device. However, he has made great contributions to the practical application of radio equipment!
so, who invented the radio? Scientific discoveries and inventions are often the result of the efforts of many scientists at the same time or successively, especially modern inventors. Few people can accomplish an epoch-making invention by themselves.