What communication technique utilizes microwave frequencies?

The communication technique that utilizes microwave frequencies is satellite communication. This method relies on the transmission of data via satellites orbiting the Earth, which communicate with ground stations using microwave frequencies. This allows for long-distance communication without the need for physical cables, making it particularly useful for broadcasting services, internet access in remote areas, and services to mobile devices. The microwave frequencies used in satellite communication can penetrate the atmosphere effectively, allowing signals to travel over vast distances.

In contrast, fiber optics employs pulses of light transmitted through glass or plastic fibers, which do not involve microwave frequencies. Wired networks are typically based on copper cabling and electrical signals, while broadband DSL uses telephone lines and operates over different frequency bands rather than microwaves. Thus, satellite communication is specifically distinguished by its use of microwave frequencies for data transmission.