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ultra high frequency (UHF)
Cycles per second: 300 MHz to 3000 MHz

Wavelength: 1 m to 100 mm

Ultra high frequency (UHF) designates a range (band) of electromagnetic waves whose frequency is between 300 MHz and 3.0 GHz. Waves whose frequency is above the UHF band fall into the microwave or higher bands, while lower frequency signals fall into the VHF or lower bands. See electromagnetic spectrum for a full listing of frequency bands. A band is a small section of the spectrum of radio communication frequencies, in which channels are usually used or set aside for the same purpose. ... Electromagnetic radiation or EM radiation is a combination (cross product) of oscillating electric and magnetic fields perpendicular to each other, moving through space as a wave, effectively transporting energy and momentum. ... A wave is a disturbance that propagates through space, often transferring energy. ... Sine waves of various frequencies; the lower waves have higher frequencies than those above. ... MegaHertz (MHz) is the name given to one million (106) Hertz, a measure of frequency. ... The hertz (symbol: Hz) is the SI unit of frequency. ... Microwave image of 3C353 galaxy at 8. ... Very high frequency (VHF) is the radio frequency range from 30 MHz to 300 MHz. ... Legend: γ = Gamma rays HX = Hard X-rays SX = Soft X-Rays EUV = Extreme ultraviolet NUV = Near ultraviolet Visible light NIR = Near infrared MIR = Moderate infrared FIR = Far infrared Radio waves: EHF = Extremely high frequency (Microwaves) SHF = Super high frequency (Microwaves) UHF = Ultrahigh frequency VHF = Very high frequency HF = High frequency...

Contents


Uses

UHF and VHF are the most common frequency bands for television. Modern mobile phones also transmit and receive within the UHF spectrum, and UHF is widely used for two-way radio communication (usually using narrowband frequency modulation, but digital services are on the rise) by both public service agencies and the general public. Though television broadcasting is common on UHF, there has traditionally been very little radio broadcasting in this band until fairly recently; see digital audio broadcasting for details. In communications, transmission is the act of transmitting electrical messages (and the associated phenonomena of radiant energy that pass through media). ... When used in supervisory signaling in telephony, the term frequency-change signaling has been used to describe frequency modulation. ... Digital Audio Broadcasting or DAB is a technology for broadcasting audio programming in digital form that was designed in the late 1980s. ...


One uncommon use of UHF waves is in the detection of partial discharges. These discharges occur due to the sharp geometries created in high voltage insulated equipment. The advantage is that this method can be used to localize the source of the discharge, but it is extremely sensitive to external noise. Nonetheless, such detection methods are used in the field especially for large distribution transformers. In electrical engineering, a partial discharge is a localised dielectric breakdown of a section of dielectrically stressed electrical insulation system that occurs generally in voids, cracks or interfaces within that insulation system. ... Look up Discharge in Wiktionary, the free dictionary. ... International danger high voltage symbol. ... Three-phase pole-mounted step-down transformer. ...


Characteristics and advantages

Main article: radio propagation

The transmission of radio waves from one point to another is affected by many variables such as atmospheric moisture, the stream of particles from the sun called solar wind, and time of day. All radio waves are somewhat absorbed by atmospheric moisture. This reduces, or attenuates, the strength of radio signals over long distances. However, this effect increases according to the frequency: UHF signals are generally more degraded by moisture than lower bands such as VHF. As well, the layer of the Earth's atmosphere called the ionosphere is filled with charged particles that can reflect radio waves. This can be helpful in transmitting a radio signal, since the wave bounces from the sky to the ground over and over, covering long distances. However, UHF benefits less from this effect than lower (VHF, etc.) frequencies. As the atmosphere warms and cools throughout the day, UHF transmissions may be enhanced by tropospheric ducting. Radio propagation is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another. ... Atmosphere is the general name for a layer of gases that may surround a material body of sufficient mass. ... The plasma in the solar wind meeting the heliopause For the British comic, see Solar Wind (comic). ... Attenuation is the decrease in intensity of electromagnetic radiation due to absorption or scattering of photons. ... Relationship of the atmosphere and ionosphere The ionosphere is the part of the atmosphere that is ionized by solar radiation. ... Tropospheric ducting (also known as tropospheric refraction) is a type of radio propagation that tends to happen during periods of stable, anti-cyclonic weather. ...


The main advantage of UHF transmission is that its high frequency means it has a physically short wave. Since the size of transmission and reception equipment (particularly antennas) is related to the size of the wave, smaller, less conspicuous antennas can be used than with VHF or lower bands. In biology, antenna (plural: antennae) refers to the sensing organs of several arthropods. ...


UHF is also widely used in two-way radio systems and cordless phones due to the fact that since UHF signals essentially travel over line-of-sight distances, distant transmissions cannot travel far enough to interfere with local transmissions. A great number of public safety and business communications are handled on UHF, and civilian applications such as GMRS, PMR446, and UHF CB are extremely popular. Where communications greater than line-of-sight are required, a repeater is used to propagate signals that otherwise would not reach their destinations. A portable phone or cordless phone is a wireless telephone which is associated with a fixed telephone landline (POTS) and can only be operated close to (typically less than 100 metres of) its base station, such as in and around the house. ... The General Mobile Radio Service (GMRS) is a land-mobile radio service in the United States available for short-distance two-way communications to facilitate the activities of an adult individual and his or her immediate family members, including a spouse, children, parents, grandparents, aunts, uncles, nephews, nieces, and in... Alan 456r PMR446 (Personal Mobile Radio, 446 MHz) is a radio frequency part of the UHF range that is open without licensing for personal usage in most members of the European Union. ... UHF CB is a licence-free citizens band radio service authorised by the government of Australia in the UHF 477MHz band. ... A repeater is an electronic device that receives a weak or low-level signal and retransmits it at a higher level or higher power, so that the signal can cover longer distances without degradation. ...


History

United States

On December 29, 1949 KC2XAK of Bridgeport, Connecticut became the first UHF television station to operate on a regular daily schedule. The first true commercially licensed UHF television station on the air was KPTV/Channel 27 (now VHF Channel 12) in Portland, Oregon on September 18, 1952. December 29 is the 363rd day of the year (364th in leap years) in the Gregorian Calendar, with 2 days remaining. ... 1949 (MCMXLIX) was a common year starting on Saturday (the link is to a full 1949 calendar). ... Nickname: The Park City Official website: www. ... KPTV is the FOX television affiliate serving the Portland, Oregon metropolitan area. ... Flag Seal Nickname: City of Roses, Stumptown, Bridgetown Location Location in Multnomah County and the state of Oregon Coordinates , Government Country State County United States Oregon Multnomah County Mayor Tom Potter Geographical characteristics Area     City 145. ... September 18 is the 261st day of the year (262nd in leap years). ... 1952 (MCMLII) was a Leap year starting on Tuesday (link will take you to calendar). ...


In the United States, UHF stations (broadcast channels above 13) originally gained a reputation for being more locally owned, less polished, less professional, less popular, and for having weaker signal propagation than their VHF counterparts (channels 2–13). The movie UHF, starring "Weird Al" Yankovic and Michael Richards (of Seinfeld fame), parodied this phenomenon. In the late 1940s/early 1950s, the four major TV networks (NBC, CBS, ABC and DuMont) transmitted their programs mainly through VHF and the independent stations mainly through UHF (Although ABC and particularly Dumont had a large number of UHF affiliates). UHF was rereleased on DVD in 2002 by MGM UHF (also known as The Vidiot from UHF) is a comedy cult film made in 1989. ... Weird Al Yankovic (born Alfred Matthew Yankovic on October 23, 1959) is an American musician best known for his parodies of contemporary radio hits. ... Michael Richards as Kramer from an episode of Seinfeld. ... For the actor, see Jerry Seinfeld. ... NBC, (Formerly an acronym for the National Broadcasting Company until 2004), is an American television and radio network based in New York Citys Rockefeller Center. ... It has been suggested that CBS evening news anchors be merged into this article or section. ... This article is about the American network, for the Australian network, see Australian Broadcasting Corporation The American Broadcasting Company (ABC) is a television and radio network in the United States. ... DuMont Televisions Logo The DuMont Television Network was an American television network, beginning operation in 1946. ...


However, with the emergence of additional broadcast television networks (Fox, UPN, WB, and i), the concentration of media ownership, and the proliferation of cable television, digital television, and DBS in the 1990s, the distinction between UHF and VHF stations has virtually disappeared in the United States. Most HDTV stations broadcast their over-the-air signal in the UHF band. The Fox Broadcasting Company is a television network in the United States. ... The official logo for UPN. UPN (which originally stood for the United Paramount Network) is a television network in the United States, owned by Viacom Inc. ... The WB Television Network is a television network in the United States, founded as a joint venture between the Warner Bros. ... The correct title of this article is i (TV network). ... Concentration of media ownership (also known as media consolidation or media convergence) is a commonly used term among media critics, policy makers, and others to characterize ownership structure of media industries. ... Coaxial cable is often used to transmit cable television into the house. ... Digital television (DTV) is a telecommunication system for broadcasting and receiving moving pictures and sound by means of digital signals, in contrast to analog signals in analog (traditional) TV. It uses digital modulation data, which is digitally compressed and requires decoding by a specially designed television set or a standard... Direct broadcast satellite (DBS) is a term used to refer to satellite television broadcasts intended for home reception, also refered to as direct-to-home signals. ... See also 1990s, the band The 1990s decade refers to the years from 1990 to 1999, inclusive, sometimes informally including popular culture from the very late 1980s and from 2000 and beyond. ... Projection screen in a home theater, displaying a high-definition television image. ...


The Family Radio Service and General Mobile Radio Service use the 462 and 467 MHz areas of the UHF spectrum; there is also a great amount of unlicensed activity (cordless phones, wireless networking, and the like) clustered around 800 MHz and 2.4 GHz. The Family Radio Service is an improved walkie talkie system authorized in the United States. ... The General Mobile Radio Service (GMRS) is a land-mobile UHF radio service in the United States available for short-distance two-way communications to facilitate the activities of an adult individual who possesses a valid GMRS license, as well his or her immediate family members, including a spouse, children...


United Kingdom

In Britain, UHF television began with the launch of BBC2 in 1964. BBC1 and ITV soon added their own services on UHF (British channels 21 to 69) on November 15, 1969, and PAL colour was introduced on UHF only in 1967 (for BBC2) & 1969 (for BBC1 & ITV). VHF only carried BBC1 & ITV and was only ever in 405 line Black & White. VHF television was closed in February 1985. Today all British terrestrial (non-satellite) television channels (analogue and digital) are on UHF. A drawback to this is the very large number of small relay transmitters needed to fill in gaps in the main transmitters' coverage, which would not have been necessary with a VHF system due to its different propagation characteristics. BBC Two (or BBC2 as it was formerly styled) was the second UK television station to be aired by the BBC and Europes first television channel to broadcast regularly in colour (from 1967), envisaged as a home for less mainstream and more ambitious programming. ... 1964 (MCMLXIV) was a leap year starting on Wednesday (the link is to a full 1964 calendar). ... BBC One (or BBC1 as it was formerly styled) is the oldest television station in the world. ... ITV (Independent Television) is the name given to the original network of British commercial television broadcasters, set up under the Independent Television Authority (ITA) to provide competition to the BBC. In England, Wales and southern Scotland, the channel has been rebranded to ITV1 by ITV plc, the owners of the... November 15 is the 319th day of the year (320th in leap years) in the Gregorian Calendar, with 46 days remaining. ... 1969 (MCMLXIX) was a common year starting on Wednesday (the link is to a full 1969 calendar). ... PAL, short for phase-alternating line, phase alternation by line or phase alternation line, is a colour encoding system used in broadcast television systems in large parts of the world. ... 1967 (MCMLXVII) was a common year starting on Sunday of the Gregorian calendar (the link is to a full 1967 calendar). ... 1969 (MCMLXIX) was a common year starting on Wednesday (the link is to a full 1969 calendar). ... 1985 (MCMLXXXV) was a common year starting on Tuesday of the Gregorian calendar. ... Analog television encodes television picture information as an analog signal, that is, by varying the voltages and/or frequencies of the signal. ... Digital television (DTV) uses digital modulation and compression to broadcast video, audio and data signals to television sets. ...


Australia

In Australia, UHF was first anticipated in the mid 1970s with channels 28 to 69. The first UHF TV broadcasts in Australia were operated by Special Broadcasting Service (SBS) on channel 28 in Sydney and Melbourne starting in 1980, and translator stations for the Australian Broadcasting Corporation (ABC). The UHF band is now used extensively as ABC, SBS, commercial and community (public access) television services have expanded particularly through regional areas. The 1970s decade refers to the years from 1970 to 1979, inclusive. ... The Special Broadcasting Service (SBS) is one of two government funded Australian public broadcasting radio and television networks, the other being the Australian Broadcasting Corporation (ABC). ... The Sydney Opera House on Sydney Harbour Sydney (pronounced ) is the most populous city in Australia with a metropolitan area population of over 4. ... Melbourne (pronounced either or [1]) is the state capital and largest city in the Australian state of Victoria, and the second-largest city in Australia, with a population of approximately 3. ... The Australian Broadcasting Corporation (ABC) [1] is Australias national non-commercial public broadcaster. ... Public access television is a cable television service that allows members of the public to use a cable companys facilities and equipment to create and broadcast their own content. ...


Australia also provides the UHF CB service for general-purpose two-way communications. UHF CB is a licence-free citizens band radio service authorised by the government of Australia in the UHF 477MHz band. ...


Malaysia

UHF broadcasting was used outside Kuala Lumpur and the Klang Valley by private TV station TV3 in the late 80s, with the government stations only transmitting in VLF and VHF and the 450MHz range being occupied by the ATUR cellular phone service operated by Telekom Malaysia. The ATUR service ceased operation in the late 90s, freeing up the frequency for other uses. UHF was not commonly used in the Klang Valley until 1994 (despite TV3's signal also being available over UHF Channel 29, as TV3 transmitted over VHF Channel 12 in the Klang Valley). 1994 saw the introduction of the channel MetroVision (which ceased transmission in 1999, got bought over by TV3's parent company - System Televisyen Malaysia Berhad - and relaunched as 8TV in 2004). This was followed by NTV7 in 1998 (also acquired by TV3's parent company in 2005) and recently Channel 9 (which started in 2003, ceased transmission in 2005, was also acquired by TV3's parent company shortly after, and came back as TV9 in early 2006). At current count, there are 4 distinct UHF signals receivable by an analog TV set in the Klang Valley: Channel 25 (8TV), Channel 29 (TV3 UHF transmission), Channel 37 (NTV7) and Channel 39 (TV9). Channel 35 is usually allocated for VCRs, decoder units (i.e. the ASTRO and MiTV set top boxes) and other devices that have an RF signal generator (i.e. game consoles). Flag Seal Nickname: KL Motto: Maju dan makmur (Malay: Peace and progress) Location Location in Malaysia Coordinates: Government Country State Malaysia Federal Territory Establishment 1857 (Granted city status in 1974) Mayor Ruslin Hasan Geographical characteristics Area 243. ... Klang Valley is the area in central Selangor, Malaysia comprising Kuala Lumpur and its surroundings and suburbs naturally delineated by hilly areas and the Port Klang coastline. ... http://en. ... Telekom Malaysia Berhad (TM) is the largest telecommunication company in Malaysia. ... 8TV (Simplified Chinese: 八度空间; Pinyin: Bā Dù Kōng Jiān) is a private Malaysian television station previously known as Metrovision. ... It has been suggested that this article or section be merged with Channel 9 (Malaysia). ... The term set-top box (STB) describes a device that connects to a television and some external source of signal, and turns the signal into content then displayed on the screen. ...


Frequency Allocation - United States

A brief summary of some UHF frequency usage:

  • 300–420 MHz: government use, including meteorology
  • 420–450 MHz: radiolocation and Amateur radio (ham - 70 cm band)
  • 450–470 MHz: UHF business band, General Mobile Radio Service, and Family Radio Service 2-way "walkie-talkies"
  • 470–512 MHz: TV channels 14–20, public safety
  • 512–698 MHz: TV channels 21–51 (channel 34 used for radar[citation needed], channel 37 used for radio astronomy)
  • 698–806 MHz: TV channels 52–69 (to be auctioned for other uses once conversion to digital TV has been accomplished)
  • 806–824 MHz: pocket pagers and Nextel SMR band (formerly TV channels 70–72)
  • 824–849 MHz: Cellular phones, A & B franchises, mobile phone (formerly TV channels 73–77)
  • 849–869 MHz: public safety 2-way (fire, police, ambulance - formerly TV channels 77–80)
  • 869–894 MHz: cellular phones, A & B franchises, base station (formerly TV channels 80–83)
  • 902–928 MHz: ISM band: cordless phones and stereo, Radio Frequency Identification, datalinks, Amateur radio (33 cm band)
  • 928–960 MHz: mixed Studio-Transmitter Links, mobile 2-way, other
  • 1240–1300 MHz: Amateur radio (ham - 23 cm band)
  • 1850–1910 MHz: PCS mobile phone—note below
  • 1930–1990 MHz: PCS base stations—note below
  • note: order is A, D, B, E, F, C blocks. A, B, C = 15 MHz; D, E, F = 5 MHz
  • 2310–2360 MHz: Satellite radio (Sirius and XM)
  • 2390–2450 MHz: Amateur radio (ham - 13 cm band)
  • 2400–2483.5 MHz: ISM, IEEE 802.11, 802.11b, 802.11g Wireless LAN, IEEE 802.15.4
  • around 2450 MHz: Microwave oven

To meet Wikipedias quality standards, this article or section may require cleanup. ... Amateur radio, often called ham radio, is a hobby and public service enjoyed by about 3 million people[1] throughout the world. ... 70 Centimeters is a common ham radio band in the UHF spectrum. ... The General Mobile Radio Service (GMRS) is a land-mobile UHF radio service in the United States available for short-distance two-way communications to facilitate the activities of an adult individual who possesses a valid GMRS license, as well his or her immediate family members, including a spouse, children... The Family Radio Service is an improved walkie talkie system authorized in the United States. ... This long range radar antenna, known as ALTAIR, is used to detect and track space objects in conjunction with ABM testing at the Ronald Reagan Test Site on the Kwajalein atoll[1]. Radar is a system that uses radio waves to detect, determine the distance of, and map, objects such... Microwave image of 3C353 galaxy at 8. ... Mobile phones from various years A mobile or cell(ular) (tele)phone is a long-range, portable electronic device for peer-to-peer telecommunications over long distances. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... 33 Centimeters is an amateur radio band. ... A satellite radio or subscription radio (SR) is a digital radio that receives signals broadcast by communications satellite, which covers a much wider geographical range than terrestrial radio signals. ... Sirius Satellite Radio NASDAQ: SIRI is a satellite radio (DARS) service based in New York City that provides 68 streams (channels) of music and 55 streams of sports, news and entertainment to the United States and Canada. ... XM Satellite Radio Holdings (XM) NASDAQ: XMSR is a satellite radio (DARS) service in the United States and Canada. ... IEEE 802. ... Lan can stand for several things: A local area network Lan (airline) formerly LanChile Lan Peru Län, a kind of administrative division used in Sweden Lan Mandragoran, a fictional character in the Wheel of Time fantasy series by Robert Jordan. ... Microwave oven A microwave oven, or microwave, is a kitchen appliance employing microwave radiation primarily to cook or heat food. ...

Frequency Allocation - United Kingdom

  • 430–440 MHz: Amateur radio (ham - 70 cm band)
  • 470–862 MHz: TV channels 21–69 (channel 36 used for radar, channel 38 used for radio astronomy, channel 69 used for licenced and licence exempt wireless microphones, channels 31-40 and 63-68 to be auctioned for other uses)
  • 1240–1316 MHz: Amateur radio (ham - 23 cm band)
  • 2310–2450 MHz: Amateur radio (ham - 13 cm band)

70 Centimeters is a common ham radio band in the UHF spectrum. ...

Australia

UHF Citizens Band: 476.425 - 477.400 MHz Refer: http://www.manilla2007.com/Default.aspx?tabid=145


See also

Radio spectrum
ELF SLF ULF VLF LF MF HF VHF UHF SHF EHF
3 Hz 30 Hz 300 Hz 3 kHz 30 kHz 300 kHz 3 MHz 30 MHz 300 MHz 3 GHz 30 GHz
30 Hz 300 Hz 3 kHz 30 kHz 300 kHz 3 MHz 30 MHz 300 MHz 3 GHz 30 GHz 300 GHz


In the United States and Canada, TV channel 37 occupies a band of frequencies from 608 to 614 MHz. ... Radio frequency, or RF, refers to that portion of the electromagnetic spectrum in which electromagnetic waves can be generated by alternating current fed to an antenna. ... Extremely low frequency (ELF) is the band of radio frequencies from 3 to 30 Hz. ... Super Low Frequency (SLF) is the frequency range between 30 hertz and 300 hertz. ... Ultra Low Frequency (ULF) is the frequency range between 300 hertz and 3000 hertz. ... Very low frequency or VLF refers to radio frequencies (RF) in the range of 3 to 30 kHz. ... This article is being considered for deletion in accordance with Wikipedias deletion policy. ... Mediumwave radio transmissions (sometimes called Medium frequency or MF) are those between the frequencies of 300 kHz and 3000 kHz. ... High frequency (HF) radio frequencies are between 3 and 30 MHz. ... Very high frequency (VHF) is the radio frequency range from 30 MHz (wavelength 10 m) to 300 MHz (wavelength 1 m). ... Microwave Slang for small waves, like at a beach, often used by surfers. ... Extremely high frequency is the highest radio frequency band. ...



The Electromagnetic Spectrum
(Sorted by wavelength, short to long)
Gamma ray | X-ray | Ultraviolet | Visible spectrum | Infrared | Terahertz radiation | Microwave | Radio waves
Visible (optical) spectrum: Violet | Blue | Green | Yellow | Orange | Red
Microwave spectrum: W band | V band | K band: Ka band, Ku band | X band | C band | S band | L band
Radio spectrum: EHF | SHF | UHF | VHF | HF | MF | LF | VLF | ULF | SLF | ELF
Wavelength designations: Microwave | Shortwave | Mediumwave | Longwave

Legend: γ = Gamma rays HX = Hard X-rays SX = Soft X-Rays EUV = Extreme ultraviolet NUV = Near ultraviolet Visible light NIR = Near infrared MIR = Moderate infrared FIR = Far infrared Radio waves: EHF = Extremely high frequency (Microwaves) SHF = Super high frequency (Microwaves) UHF = Ultrahigh frequency VHF = Very high frequency HF = High frequency... This article is about electromagnetic radiation. ... In the NATO phonetic alphabet, X-ray represents the letter X. An X-ray picture (radiograph) taken by Röntgen An X-ray is a form of electromagnetic radiation with a wavelength approximately in the range of 5 pm to 10 nanometers (corresponding to frequencies in the range 30 PHz... Ultraviolet (UV) light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than soft X-rays. ... The visible spectrum (or sometimes optical spectrum) is the portion of the electromagnetic spectrum that is visible to the human eye. ... Image of a small dog taken in mid-infrared (thermal) light (false color) Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of radio waves. ... Radio waves sent at terahertz frequencies, known as terahertz radiation, terahertz waves, T-rays, T-light, T-lux and THz, are in the region of the light spectrum between 300 gigahertz (3x1011 Hz) and 3 terahertz (3x1012 Hz), corresponding to the wavelength range starting at submillimeter (<1 millimeter) and 100... Microwave image of 3C353 galaxy at 8. ... Rough plot of Earths atmospheric transmittance (or opacity) to various wavelengths of electromagnetic radiation, including radio waves. ... The visible spectrum (or sometimes optical spectrum) is the portion of the electromagnetic spectrum that is visible to the human eye. ... Violet (named after the flower violet) is used in two senses: first, to the color of light at the short-wavelength end of the visible spectrum, approximately 420-380 nanometres (this is a spectral color). ... Blue is any of a number of similar colors. ... See Green for the color. ... Yellow is any color of light that stimulates both the red and green cone cells of the retina, but not the blue cone cells. ... The colour orange occurs between red and yellow in the visible spectrum at a wavelength of about 585–620 nanometres. ... Red is any of a number of similar colors at the lowest frequencies of light discernible by the human eye. ... The W band of the microwave part of the electromagnetic spectrum and ranges from 75 to 111 GHz. ... The V band (vee-band) of the electromagnetic spectrum ranges from 50 to 75 GHz. ... K band is a portion of the electromagnetic spectrum in the microwave range of frequencies ranging between 12 to 63 GHz. ... The Ka band (kurz-above band) is a portion of the K band of the microwave band of the electromagnetic spectrum. ... The Ku band (kay-yoo kurz-under band) is a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 11 to 18 GHz. ... The X band (3-cm radar spot-band) of the microwave band of the electromagnetic spectrum roughly ranges from 5. ... C band (compromise band) is a portion of electromagnetic spectrum in the microwave range of frequencies ranging from 4 to 6 GHz. ... The S band ranges from 2. ... L band (20-cm radar long-band) is a portion of the microwave band of the electromagnetic spectrum ranging roughly from 0. ... Radio frequency, or RF, refers to that portion of the electromagnetic spectrum in which electromagnetic waves can be generated by alternating current fed to an antenna. ... Extremely high frequency is the highest radio frequency band. ... Microwave Slang for small waves, like at a beach, often used by surfers. ... Very high frequency (VHF) is the radio frequency range from 30 MHz (wavelength 10 m) to 300 MHz (wavelength 1 m). ... High frequency (HF) radio frequencies are between 3 and 30 MHz. ... Mediumwave radio transmissions (sometimes called Medium frequency or MF) are those between the frequencies of 300 kHz and 3000 kHz. ... This article is being considered for deletion in accordance with Wikipedias deletion policy. ... Very low frequency or VLF refers to radio frequencies (RF) in the range of 3 to 30 kHz. ... Ultra Low Frequency (ULF) is the frequency range between 300 hertz and 3000 hertz. ... Super Low Frequency (SLF) is the frequency range between 30 hertz and 300 hertz. ... Extremely low frequency (ELF) is the band of radio frequencies from 3 to 30 Hz. ... Microwave image of 3C353 galaxy at 8. ... A Grundig shortwave receiver Shortwave radio operates between the frequencies of 2,310 kHz and 25. ... Mediumwave radio transmissions serves as the most common band for broadcasting. ... Longwave radio frequencies are those below 500 kHz, which correspond to wavelengths longer than 600 meters. ...

External articles

  • Tomislav Stimac, "Definition of frequency bands (VLF, ELF... etc.)". IK1QFK Home Page (vlf.it).

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