High frequency (HF) is the ITU-designated range of radio frequency electromagnetic waves (radio waves) between 3 and 30 MHz . It is also known as the decameter band or decameter wave as the wavelengths range from one to ten decameters (ten to one hundred metres).
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Extremely high frequency Extremely high frequency (ITU)Frequency range110 to 300 GHzWavelength range2.73 to 1 mmRelated bandsEHF (IEEE)Extremely high frequency – Wikipedia en.wikipedia.org › wiki › Extremely_high_frequency
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