Extremely high frequency (EHF) is the ITU designation for the band of radio frequencies in the electromagnetic spectrum from 30 to 300 gigahertz, above which electromagnetic radiation is considered to be low (or far) infrared light, also referred to as terahertz radiation. Radio waves in this band have wavelengths from ten to one millimetre, giving it the name millimetre band or millimetre wave, sometimes abbreviated MMW or mmW. Millimetre length electromagnetic waves were first investigated in the 1890s by pioneering Indian scientist Jagadish Chandra Bose. Extremely High Frequency, Wikipedia

See Also

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Apparatus For Producing Electric Currents of High Frequency and Potential - 568176
center frequency
cutoff frequency
Debye frequency
eigenfrequency
Ether Generator Producing High Pressures
Figure 18.16 - Mind States when Demanding and Receiving Higher Knowledge
Figure 5.2 - Centers of Swirls are High Tension while Swirl Periphery are Low Tension
Frequency Classification of Plasmas
Frequency Domain
Frequency Modulation
frequency response
Frequency Wavelength Light Energy
frequency
high luminous
High-Pass Filter
Higher Sources
MOLECULAR OSCILLATING FREQUENCY
resonant frequency
Subdivision
14.22 - Dominant is the High Neutral
14.22.1 - Enharmonic is the High Neutral
15.20 - Dissociation Frequency