The antenna was invented by Russian scientist popov. 1888, after popov, 29, learned that the famous German physicist Hertz had discovered electromagnetic waves, the young scientist who was determined to popularize electric lights said to his friends, "I spent my whole life installing electric lights, which only lit up a small corner for the vast Russia: if I can direct electromagnetic waves, I can fly across the whole world!" So, he immersed himself in research and launched an impact on new goals. 1894, popov made a radio receiver. The core of this receiver is an improved metal chip detector, and popov uses an electric bell as the terminal display. The small hammer of the electric bell can shake the metal chips in the detector loose. The electric bell is driven by an electromagnetic relay. When the metal chip detector detects electromagnetic waves, the relay is connected to the power supply and the electric bell rings. On one occasion, popov found in the experiment that the distance of the receiver to detect radio waves suddenly increased a lot than usual.