5G technology shines brightly, the future star atop the crown of communications.

Communication technology is primarily divided into two major categories: wired communication and wireless communication. These two technologies transmit information data through different mediums.

Wired communication relies on physical substances such as copper wires or optical fibers to transmit data. The advantage of this method lies in its ability to achieve extremely high data transmission rates. For example, the current mainstream mobile communication standard, 4G LTE, can theoretically reach a maximum transmission rate of 150Mbps without using carrier aggregation technology.

Wireless communication, on the other hand, utilizes electromagnetic waves for data transmission. Electromagnetic waves include radio waves and light waves, and their functional characteristics are determined by their frequency. Electromagnetic waves of different frequencies have different properties and uses. Currently, we mainly use radio waves for communication, while light wave communication technology is also gradually developing. Due to the limited frequency resources of radio waves, to avoid interference, we divide them into different frequency bands and allocate them to different communication objects and purposes. For instance, GSM900 and CDMA800 refer to communication technologies operating at 900MHz and 800MHz frequency bands, respectively.

With technological advancements, from 1G to 4G, communication frequencies have gradually increased. The higher the frequency, the more abundant the available frequency resources, thereby supporting higher data transmission rates. 5G technology further expands the frequency range, including bands below 6GHz and above 24GHz. High-frequency electromagnetic waves are characterized by higher frequencies, shorter wavelengths, more linear propagation, and greater attenuation during transmission.

A key innovation in 5G technology is Massive MIMO (Multiple Input Multiple Output), which enhances the efficiency and capacity of signal transmission by increasing the number of antennas. Additionally, 5G introduces Device to Device (D2D) communication, allowing users under the same base station to communicate directly without forwarding through the base station, thereby saving air resources and reducing the base station's burden.

In summary, 5G is not an unattainable innovation but an evolution of existing communication technologies. The development of communication technology is constrained by mathematical principles, and experts in the communication industry are committed to continuously exploring and unlocking the potential of communication technology within the framework of these scientific principles.