Mobile phone from the point of view of physics

The rapid development of communications has taken place over the past 20 years. This is due to the transition from data transmission via cable (model of Alexander bell's telephone) to modern satellite systems (radio waves). The article is devoted to the basic principles of mobile phone operation. A cell phone is a technical device that combines a receiver and a radio transmitter. All devices work on the same principle - they are emitters of electromagnetic waves.