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Ku Band
The Ku band
Ku band
(pronunciation: /ˌkeɪˈjuː/) is the portion of the electromagnetic spectrum in the microwave range of frequencies from 12 to 18 gigahertz (GHz). The symbol is short for "K-under" (originally German: Kurz-unten), because it is the lower part of the original NATO K band, which was split into three bands (Ku, K, and Ka) because of the presence of the atmospheric water vapor resonance peak at 22.24 GHz, (1.35 cm) which made the center unusable for long range transmission
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Hertz
The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units
International System of Units
(SI) and is defined as one cycle per second.[1] It is named for Heinrich Rudolf Hertz, the first person to provide conclusive proof of the existence of electromagnetic waves. Hertz
Hertz
are commonly expressed in multiples: kilohertz (103 Hz, kHz), megahertz (106 Hz, MHz), gigahertz (109 Hz, GHz), and terahertz (1012 Hz, THz). Some of the unit's most common uses are in the description of sine waves and musical tones, particularly those used in radio- and audio-related applications
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Band VI
Band VI is a radio frequency range within the super high frequency (SHF) part of the electromagnetic spectrum.[1][2][3] One source states that Band VI ranges from 11.7 to 12.5 GHz,[1] whilst other earlier sources state the range as 11.7 to 12.7 GHz.[2][3] The band is used for direct-broadcast satellite (DBS)[1] and amateur radio astronomy.[4] References[edit]^ a b c "UK BROADCASTING BANDS" (PDF). TheSkywaves.NET. 2003-01-01. Retrieved 2009-05-20.  ^ a b "Latest statistics on radio and television broadcasting" (PDF). UNESCO, Division of Statistics on Culture and Communication Office of Statistics. 1987. Retrieved 2009-05-20.  ^ a b "SATELLITE BROADCASTING: A ZONED REFLECTOR AERIAL FOR THEDOMESTIC RECEPTION OF BAND VI" (PDF). BBC Research & Development. 1972. Retrieved 2009-05-20.  ^ "radioastronomy with a small 12 GHz satellitedish". Society of Amateur Radio Astronomers. 2008-09-03
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Meter
The metre (British spelling and BIPM spelling[1]) or meter (American spelling) (from the French unit mètre, from the Greek noun μέτρον, "measure") is the base unit of length in some metric systems, including the International System of Units
International System of Units
(SI). The SI unit symbol is m.[2] The metre is defined as the length of the path travelled by light in a vacuum in 1/299 792 458 second.[1] The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole. In 1799, it was redefined in terms of a prototype metre bar (the actual bar used was changed in 1889). In 1960, the metre was redefined in terms of a certain number of wavelengths of a certain emission line of krypton-86. In 1983, the current definition was adopted. The imperial inch is defined as 0.0254 metres (2.54 centimetres or 25.4 millimetres). One metre is about ​3 3⁄8 inches longer than a yard, i.e
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Band IV
Band IV is the name of a radio frequency range within the ultra high frequency part of the electromagnetic spectrum.[1][2][3][4][5] Sources differ on the exact frequency range of the band. For example, the Swiss Federal Office of Communications,[1] the Broadcast engineer's reference book[2] and Ericsson
Ericsson
India Ltd[3] all define the range of Band IV from 470 to 582 MHz
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Band V
Band V (meaning Band 5) is the name of a radio frequency range within the ultra high frequency part of the electromagnetic spectrum.[1][2] It is not to be confused with the V band
V band
in the extremely high frequency part of the spectrum. Sources differ on the exact frequency range of UHF Band V. For example, the Broadcast engineer's reference book[1] and the BBC[2] define the range as 614 to 854 MHz. The IPTV India Forum define the range as 582 to 806 MHz[3] and the DVB Worldwide website refers to the range as 585 to 806 MHz.[4] Band V is primarily used for analogue and digital ( DVB-T
DVB-T
& ATSC) television broadcasting, as well as radio microphones and services intended for mobile devices such as DVB-H
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Band II
Band II is the range of radio frequencies within the very high frequency (VHF) part of the electromagnetic spectrum from 87.5 to 108.0 megahertz (MHz).Contents1 Radio 2 Broadcast television2.1 Usage in Russia and in other former members of OIRT3 ReferencesRadio[edit] Band II is primarily used worldwide for FM radio broadcasting.[1] Broadcast television[edit] Usage in Russia and in other former members of OIRT[edit] In the former Soviet Union and other countries-members of OIRT, frequencies from 76 MHz to 100 MHz were designated for broadcast television usage.[2] Considering 8 MHz channel bandwidth used by the Russian analog television system (System D), the following
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Gigahertz
The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units
International System of Units
(SI) and is defined as one cycle per second.[1] It is named for Heinrich Rudolf Hertz, the first person to provide conclusive proof of the existence of electromagnetic waves. Hertz
Hertz
are commonly expressed in multiples: kilohertz (103 Hz, kHz), megahertz (106 Hz, MHz), gigahertz (109 Hz, GHz), and terahertz (1012 Hz, THz). Some of the unit's most common uses are in the description of sine waves and musical tones, particularly those used in radio- and audio-related applications
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German Language
No official regulation ( German orthography
German orthography
regulated by the Council for German Orthography[4]). Language
Language
codesISO 639-1 deISO 639-2 ger (B) deu (T)ISO 639-3 Variously: deu – German gmh&#
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Water Vapor
Water
Water
vapor, water vapour or aqueous vapor is the gaseous phase of water. It is one state of water within the hydrosphere. Water
Water
vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. Unlike other forms of water, water vapor is invisible.[4] Under typical atmospheric conditions, water vapor is continuously generated by evaporation and removed by condensation. It is lighter than air and triggers convection currents that can lead to clouds. Being a component of Earth's hydrosphere and hydrologic cycle, it is particularly abundant in Earth's atmosphere
Earth's atmosphere
where it is also a potent greenhouse gas along with other gases such as carbon dioxide and methane
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Electromagnetic Spectrum
The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelengths and photon energies. The electromagnetic spectrum covers electromagnetic waves with frequencies ranging from below one hertz to above 1025 hertz, corresponding to wavelengths from thousands of kilometers down to a fraction of the size of an atomic nucleus. This frequency range is divided into separate bands, and the electromagnetic waves within each frequency band are called by different names; beginning at the low frequency (long wavelength) end of the spectrum these are: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays at the high-frequency (short wavelength) end. The electromagnetic waves in each of these bands have different characteristics, such as how they are produced, how they interact with matter, and their practical applications
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Band III
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 (MHz). It is primarily used for radio and television broadcasting
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Band I
Band I is a range of radio frequencies within the very high frequency (VHF) part of the electromagnetic spectrum. Band I ranges from 47 to 68 MHz
MHz
for the European Broadcasting
Broadcasting
Area,[1] and from 54 to 88 MHz for the Americas[2] and it is primarily used for television broadcasting in line to ITU Radio Regulations (article 1.38)
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G Band (NATO)
The NATO G band is the obsolete designation given to the radio frequencies from 4 000 to 6 000 MHz (equivalent to wavelengths between 7.5 and 5 cm) during the cold war period. Since 1992 frequency allocations, allotment and assignments are in line to NATO Joint Civil/Military Frequency Agreement (NJFA).[1] However, in order to identify military radio spectrum requirements, e.g
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W Band
The W band
W band
of the microwave part of the electromagnetic spectrum ranges from 75 to 110 GHz, wavelength ≈2.7–4 mm. It sits above the U.S. IEEE-designated V band
V band
(40–75 GHz) in frequency, and overlaps the NATO designated M band
M band
(60–100 GHz). The W band is used for satellite communications, millimeter-wave radar research, military radar targeting and tracking applications, and some non-military applications.Contents1 Radar 2 Heat ray 3 Communications 4 References 5 Further reading 6 External linksRadar[edit] A number of passive millimeter-wave cameras for concealed weapons detection operate at 94 GHz. A frequency around 77  GHz is used for automotive cruise control radar
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V Band
The V band
V band
("vee-band") is a standard designation by the Institute of Electrical and Electronic Engineers (IEEE) for a band of frequencies in the microwave portion of the electromagnetic spectrum ranging from 40 to 75 gigahertz (GHz).[1][2] The V band
V band
is not heavily used, except for millimeter wave radar research and other kinds of scientific research. It should not be confused with the 600–1000 MHz range of Band-V (band-five) of the UHF
UHF
frequency range. The V band
V band
is also used for high capacity terrestrial millimeter wave communications systems. In the United States, the Federal Communications Commission has allocated the frequency band from 57 to 71 GHz for unlicensed wireless systems.[3] These systems are primarily used for high capacity, short distance (less than 1 mile) communications
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