radio relay

Radio technology involves the transmission and detection of communication signals using electromagnetic waves. These waves travel through the air, either in a straight line or by reflecting off the ionosphere or satellites. Radio waves, like light, travel at approximately 300,000,000 meters per second and have oscillating amplitudes. The frequency of these waves, measured in Hertz (Hz), determines their properties.12

A radio relay is a station that receives and retransmits a radio signal. This is crucial for extending the range of communication, especially for line-of-sight microwave links. These links use directional antennas to focus radio beams between two points, which can be terrestrial or satellite-based. The maximum range of land-based systems is limited by the Earth's curvature, necessitating repeaters to maintain signal strength over long distances.3