Extremely high frequency (EHF) is the International Telecommunication Union designation for the band of radio frequencies in the electromagnetic spectrum...

Advanced Extremely High Frequency (AEHF) is a constellation of communications satellites operated by the United States Space Force. They are used to relay...

Extremely low frequency (ELF) is the ITU designation for electromagnetic radiation (radio waves) with frequencies from 3 to 30 Hz, and corresponding wavelengths...

at high frequencies, and a gradual loss of sensitivity to higher frequencies with age is considered normal. Sensitivity also varies with frequency, as...

Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical...

data at an extremely slow rate of about 1 bit per minute (17 millibits per second, or about 5 minutes per character). The highest frequencies useful for...

USA-214, also known as Advanced Extremely High Frequency-1 or AEHF-1, is a military communications satellite operated by the United States Air Force. It...

wing of the satellite that broadcast in the Super High Frequency (SHF) and Extremely High Frequency (EHF) ranges, and also a classified communication...

different names for the electromagnetic waves within each band. From low to high frequency these are: radio waves, microwaves, infrared, visible light, ultraviolet...

entire super high frequency (SHF) band (3 to 30 GHz, or 10 to 1 cm) at minimum. A broader definition includes UHF and extremely high frequency (EHF) (millimeter...

USA-235, also known as Advanced Extremely High Frequency 2 or AEHF-2, is a military communications satellite operated by the United States Air Force. It...

high-data-rate satellite communication (SATCOM) masts, built by Raytheon, enabling communication at super high frequency (for downlink) and extremely...

known as Schumann resonance. On the other hand, waveguides used in extremely high frequency (EHF) communications can be less than a millimeter in width. During...

electric field E ( t ) {\displaystyle E(t)} as it fluctuates at an extremely high frequency. Obtaining a spectrum from time series such as these involves the...

word can be used as an insult, like "fool", although, due to its extremely high frequency of use in a multitude of contexts, it has lost much of its offensive...

protected command and control communications through use of EHF (extremely high frequency) waveforms over military satellite constellations. As of February...

USA-292, also known as Advanced Extremely High Frequency 5 or AEHF-5, is a military communications satellite operated by the United States Space Force...

USA-288, also known as Advanced Extremely High Frequency 4 or AEHF-4, is a military communications satellite operated by the United States Air Force. It...

were based on the 601 series of communciations satellites. The Extremely high frequency (EHF) package on satellites four through eleven have an Earth coverage...

listening areas. As the frequency gets lower, the attenuation with distance decreases, so very low frequency (VLF) to extremely low frequency (ELF) ground waves...

used by wireless data transmitters, in the extremely high frequency (EHF) radio band (which is a lower frequency than visible light). The health risks posed...

transmitting and receiving radio waves in the super high frequency (SHF) or extremely high frequency (EHF) bands (e.g. microwaves). When a ground station...

northern Buryat samples of Kharkov et al. (2014) exhibited an extremely high frequency of haplogroup C2-M407: 48/76 = 63.2% C3d-M407, 14/76 = 18.4% N1c1-Tat...

ranges (medium frequency to extremely high frequency). It is component that is used in electronic systems to pass or reject specific frequencies and attenuate...

of small unmanned aerial vehicles. Radar systems operating at extremely high frequency offer enhanced Doppler resolution for a given coherent processing...

communicate on virtually every radio frequency band from very low frequency (VLF) up through advanced extremely high frequency (AEHF) using a variety of modulations...

data streaming speed using vortex millimetre waves, a form of extremely high-frequency radio wave with rapidly changing spins, the researchers transmitted...

for the HBV diode is to generate extremely high frequency signals from lower frequency input. This type of frequency multiplication is demonstrated as...

uses frequencies in the MHz range. UHF ultrasound waves have been generated as high as the gigahertz range. Characterizing extremely high-frequency ultrasound...

support varying requirements, Ultra high frequency (UHF), Super high frequency (SHF) and experimental Extremely high frequency (EHF) channels are available....