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EHF
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Diagram illustrating the commercially used bands of the radio-frequency spectrum, with labeled sections for VLF, LF, MF, HF, VHF, UHF, SHF, and EHF. Each band shows example uses such as maritime radio, AM/FM radio, television, mobile phones, satellite communications, and radio astronomy, along with a scale for wavelength and frequency.
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EHF

frequency band
Also known as: extremely high frequency
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Diagram illustrating the commercially used bands of the radio-frequency spectrum, with labeled sections for VLF, LF, MF, HF, VHF, UHF, SHF, and EHF. Each band shows example uses such as maritime radio, AM/FM radio, television, mobile phones, satellite communications, and radio astronomy, along with a scale for wavelength and frequency.
radio-frequency spectrum Commercially exploited bands of the radio-frequency spectrum.

The Extremely High Frequency (EHF) band is a part of the radio spectrum that ranges from 3 gigahertz to 300 gigahertz, corresponding to wavelengths between 1 millimeter and 10 centimeters. This band is characterized by wide bandwidths, typically from 30 megahertz to 300 megahertz, which allow for high-speed digital communications, potentially up to 1 gigabit per second.1

However, radio waves in the EHF band experience significant signal degradation due to atmospheric attenuation, particularly from rainfall scattering, and high penetration losses when passing through building exteriors. Because of these challenges, the EHF band is less populated for terrestrial communication compared to other radio bands. Despite these limitations, EHF frequencies have been utilized for intersatellite communication and satellite radio navigation, where atmospheric interference is not a concern.1

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2 Britannica Sources
  1. telecommunications media - SHF-EHF
  2. telecommunications media - HF

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