Mobile phones have become an indispensable part of our daily lives, and the key infrastructure for achieving mobile communication is the signal tower. So, how do mobile phones access the internet and make calls through signal towers? This article will reveal this secret for you.
The basic structure and working principle of signal towers
A signal tower is a tall building, usually composed of a steel frame structure, on which equipment such as antennas, feeders, and microwave antennas are installed. These devices transmit radio signals to mobile phones and allow communication between phones.
The working principle of a signal tower can be summarized as two aspects: broadcasting and reception. In terms of broadcasting, the antenna of the signal tower will emit radio signals to the surrounding area, which covers a certain range and is called a cellular area. When the phone is in this area, it can receive radio signals sent by the signal tower. In terms of reception, mobile phones will decode these radio signals into sound, image and other data, and display them on the screen. At the same time, mobile phones will also encode the user’s voice, image and other data into radio signals and send them to signal towers, which then transmit them to other mobile phones or network devices.
