Do you know? The antenna was invented by the Russian scientist Popov.

In 1888, when the 29-year-old Popov learned that the famous German physicist Hertz discovered the electromagnetic wave, the young scientist who had decided to promote the electric light said to his friends: "I used my life to install the electric light, for the vast For Russia, it only illuminates a small corner: If I can direct magnetic waves, then I can fly across the world!" So he immersed himself in research and launched a new goal.

In 1894, Popov made a radio receiver. The core of this receiver uses an improved metal chip detector, and Popov uses a bell for terminal display. The hammer of the bell can loosen the metal chips in the detector. The bell is driven by an electromagnetic relay. When the metal detector detects an electromagnetic wave, the relay is turned on and the bell rang.

On one occasion, Popov found in the experiment that the distance at which the receiver detects the wave suddenly increased much more than usual. "What is going on here?" Popov checked and found that he could not find a reason. One day, Popov accidentally found a wire on the metal chip detector. He took the wire away and the bell didn't ring; he narrowed the experimental distance so close, and the bell rang again. Popov was overjoyed and quickly connected the wire to one end of the metal chip detector and connected the other end of the detector. After retesting, the results show that the signal transmission distance increases dramatically after using the antenna.