Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz),...

Frequencies immediately below HF are denoted medium frequency (MF), while the next band of higher frequencies is known as the very high frequency (VHF)...

frequencies above the UHF band fall into the super-high frequency (SHF) or microwave frequency range. Lower frequency signals fall into the VHF (very...

Very low frequency or VLF is the ITU designation for radio frequencies (RF) in the range of 3–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively...

Very High Frequency Omnidirectional Range Station (VOR) is a type of short-range VHF radio navigation system for aircraft, enabling aircraft with a VOR...

high end of the band (Also repeaters are in the 29.500–29.700 MHz segment in many countries). Frequencies above 30 MHz are referred to as Very High Frequency...

specialist manufacturer and supplier of commercial high frequency (HF), tactical HF and very high frequency (VHF) communications equipment. Its head office...

stereocilia, range in height from 1 μm, for auditory detection of very high frequencies, to 50 μm or more in some vestibular systems. A basic measure of...

High-frequency trading (HFT) is a type of algorithmic trading in finance characterized by high speeds, high turnover rates, and high order-to-trade ratios...

television frequencies Television channel frequencies Ultra high frequency Very high frequency Moving image formats Broadcast television systems ATSC (standards)...

the electromagnetic spectrum with frequencies from 3 Hz to 3,000 GHz (3 THz). Electromagnetic waves in this frequency range, called radio waves, are widely...

very similar in appearance but with improved performance and a new set of controls for adjusting the selectivity (bandwidth) and center frequency. Rather...

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

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

known as electronic heating, radio frequency heating, and high-frequency heating, is the process in which a radio frequency (RF) alternating electric field...

survival-craft high frequency (HF); aeronautical emergency very high frequency (VHF); survival ultra high frequency (UHF); international calling and safety very high...

and varying atmospheric conditions that affect reception. In the very high frequency band, greater than 30 megahertz, the Earth's atmosphere has less...

Super high frequency (SHF) is the ITU designation for radio frequencies (RF) in the range between 3 and 30 gigahertz (GHz). This band of frequencies is also...

(in the audio spectrum). FM radio stations use the very high frequency range of radio frequencies. Throughout the world, the FM broadcast band falls within...

and other frequencies directly to the human subjects. Very high power levels of 160 dB were achieved at frequencies of 2–3 Hz. Test frequencies ranged from...

Alternating Currents of Very High Frequency, Electrical World, Feb. 21, 1891 Experiments with Alternate Currents of Very High Frequency and Their Application...

transmitting predefined digital messages via the medium-frequency (MF), high-frequency (HF) and very-high-frequency (VHF) maritime radio systems. It is a core part...

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

spectrum used for broadcasting. North American broadcast television frequencies AM broadcasting FM broadcasting Dead air Internet radio Radio network...

non-government ultra high frequency (UHF) and very high frequency (VHF) common carrier and the private radio service frequencies are shared. Further details...

inventor Nikola Tesla in 1891. It is used to produce high-voltage, low-current, high-frequency alternating-current electricity. Tesla experimented with...

times the normal value (>150 (Vf) breaths per minute) and very small tidal volumes. High frequency ventilation is thought to reduce ventilator-associated...

A high-pass filter (HPF) is an electronic filter that passes signals with a frequency higher than a certain cutoff frequency and attenuates signals with...

range of frequencies. RF circuits by contrast are typically required to operate at high frequencies but often over a very narrow frequency range. For...

Band III is the name of the range of radio frequencies within the very high frequency (VHF) part of the electromagnetic spectrum from 174 to 240 megahertz...