Extremely High Frequency (EHF) radio waves are a type of electromagnetic radiation with frequencies ranging from 30 gigahertz (GHz) to 300 GHz. This frequency range falls in the microwave region, higher in frequency than the commonly used Very High Frequency (VHF) and Ultra High Frequency (UHF) waves but lower than the frequencies of Infrared (IR) waves.
EHF waves have very short wavelengths, typically measured in millimeters, due to their high frequency. This property allows them to carry a large amount of data and enables various applications, including communication and imaging. EHF waves are commonly used in satellite communication systems, wireless local area networks (WLANs), and radar systems.
Because of their short wavelength, EHF waves have a shorter range than lower frequency waves. They are easily absorbed or scattered by obstacles such as buildings, trees, and even raindrops, which limits their usage for long-distance communication. However, their high frequency and large bandwidth capacity make them ideal for point-to-point communication over shorter distances.
Furthermore, EHF radio waves have the advantage of being less susceptible to interference from other devices, benefiting from their high frequency band being less crowded. This property makes EHF waves particularly suitable for secure communication systems.
In summary, EHF radio waves refer to electromagnetic waves with extremely high frequencies ranging from 30 GHz to 300 GHz. They possess short wavelengths and are commonly utilized in satellite communication, local area networks, radar systems, and other applications requiring high data capacity and secure communication within a limited range.
