1888, German scientist heinrich hertz discovered the existence of radio waves.
1895 Russian physicist popov claimed that he successfully sent and received radio signals in two places 600 yards apart.
Later in the same year, Guglielmo Marconi, the son of a wealthy Italian businessman who was only 2 1 year-old, successfully launched his first launch on his father's manor land by radio waves.
1897, popov successfully communicated with the land platform on the naval cruiser with the wireless communication equipment made by himself.
Marconi sent radio waves to the other side of the Atlantic in 190 1 year.
1906, the Canadian inventor Fessenden made the first sound, and the radio broadcast began.
In the same year, American Reed forest invented the vacuum tube, which was the ancestor of vacuum tube radio.
Since then, improved transistor radios (atomic particle radios) and transistor radios have appeared.
In fact, there is controversy about the inventor of the radio; Some people say popov, others say alexander popov (1859 1906), 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 my predecessors Maxwell and Hertz. In a speech on May 7th, 1895, he disclosed his research results of successfully transmitting and receiving radio signals after Rocky improved the receiver. 190 1, professor of physics at St. Petersburg university; Some people think that he is the real inventor of radio, but perhaps because he is a scholar and is too focused on academic research, the invention of radio has not been widely known by the world; Perhaps it was because popov's invention was kept secret by the Russian Navy as a great weapon in the military. On the contrary, Marconi is very business-minded. It is said that he established the first radio factory in the world and obtained the patent right. However, some people criticized that the radio he made only combined other people's inventions-Hertz coil antenna, Lodge's tuner and receiver, and Nikolai Terca's spark device. There is no denying that he has made outstanding contributions to the practical application of radio equipment.