The low-frequency radio range, also known as the four-course radio range, LF/MF four-course radio range, A-N radio range, Adcock radio range, or commonly...

Low frequency (LF) is the ITU designation for radio frequencies (RF) in the range of 30–300 kHz. Since its wavelengths range from 10–1 km, respectively...

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

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,...

Super low frequency (SLF) is the ITU designation for electromagnetic waves (radio waves) in the frequency range between 30 hertz and 300 hertz. They have...

radio spectrum is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3,000 GHz (3 THz). Electromagnetic waves in this frequency range...

Ultra low frequency (ULF) is the ITU designation for the frequency range of electromagnetic waves between 300 hertz and 3 kilohertz, corresponding to wavelengths...

through electronic warfare.[citation needed] The low-frequency radio range (LFR, also "Four Course Radio Range" among other names) was the main navigation...

different upper and lower bounds for the frequency range. Electric currents that oscillate at radio frequencies (RF currents) have special properties not shared...

Medium frequency (MF) is the ITU designation for radio frequencies (RF) in the range of 300 kilohertz (kHz) to 3 megahertz (MHz). Part of this band is...

contrast to directional radio beacons and other navigational aids, such as low-frequency radio range, VHF omnidirectional range (VOR) and tactical air...

the ISM frequencies, although these low-power transmitters are not considered to be ISM devices. The ISM bands are defined by the ITU Radio Regulations...

separated into two different frequency ranges. First there is Frequency Range 1 (FR1), which includes sub-7 GHz frequency bands, some of which are traditionally...

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

The Low-Frequency Array (LOFAR) is a large radio telescope, with an antenna network located mainly in the Netherlands, and spreading across 7 other European...

Radio waves (formerly called Hertzian waves) are a type of electromagnetic radiation with the lowest frequencies and the longest wavelengths in the electromagnetic...

after a nuclear attack. The system used both very low frequency (VLF), and low frequency (LF) radio bands. SLFCS was used for United States nuclear forces'...

High frequency (HF) is the ITU designation for the band of radio waves with frequency between 3 and 30 megahertz (MHz). It is also known as the decameter...

Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as...

title refers to a technical term used in the low-frequency radio range. An identification of a range's cone of silence is shown early in the film. Captain...

(LNA). The LNB is a combination of low-noise amplifier, frequency mixer, local oscillator and intermediate frequency (IF) amplifier. It serves as the RF...

much radio spectrum is set aside for amateur radio transmissions. Individual amateur stations are free to use any frequency within authorized frequency ranges;...

LowFER (Low-Frequency Experimental Radio) refers to experimental radio communication practiced by hobbyists on frequencies below 300 kHz, a part of the...

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

A short-range device (SRD), described by ECC Recommendation 70-03, is a radio-frequency transmitter device used in telecommunication that has little capability...

Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external...

radiation of different frequencies – ranging from static magnetic fields, through extremely low frequencies (ELF) to higher radio frequencies (RF) administered...

Ultra-wideband) Frequency agility, and frequency selection Advanced/irregular scan patterns Coded pulses (coherent detection) High processing gain Low sidelobe...

and mount. The concept was encountered as early as the 1950s in low-frequency radio ranges, when it was used to determine when an aircraft was directly over...

combination of insufficient training and shortcomings in the aircraft's low frequency radio range equipment. The accident aircraft was a Douglas C-47A-5-DK Skytrain...