# Ultra high frequency
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{{redirect|UHF}}
{{Short description|Electromagnetic spectrum 300–3000 MHz}}
{{MWband
| name = Ultra high frequency (ITU)
| freq = 300 [MHz](/source/Hertz) to 3 [GHz](/source/Hertz)
| wave = 1 m to 10 cm
| bands = {{startplainlist|class=nowrap}}
* [B](/source/B_band_(NATO)){{\}}[C](/source/C_band_(NATO)){{\}}[D](/source/D_band_(NATO)){{\}}[E band](/source/E_band_(NATO))s (NATO)
* UHF and [L](/source/L_band){{\}}[S band](/source/S_band)s (IEEE)
{{endplainlist}}
| name2 = Ultra high frequency (IEEE)
| freq2 = 300 MHz to 1 GHz
| wave2 = 1 m to 30 cm
| bands2 = {{startplainlist|class=nowrap}}
* UHF (ITU)
* [B](/source/B_band){{\}}[C band](/source/C_band_(NATO))s (NATO)
{{endplainlist}}
}}
'''Ultra high frequency''' ('''UHF''') is the [ITU](/source/ITU) designation[{{cite book | title = US Federal Standard 1037B: Telecommunications, Glossary of Telecommunications Terms | publisher = Office of Technology Standards, General Services Administration | date = 3 June 1991 | pages = S-18 | url = https://books.google.com/books?id=zYLXU4fkD34C&pg=RA15-PA18}}][{{cite conference |date=2015 |title=Final Acts WRC-15 |url=https://www.itu.int/dms_pub/itu-r/opb/act/R-ACT-WRC.12-2015-PDF-E.pdf |conference=World Radiocommunication Conference |location=Geneva, Switzerland |publisher=International Telecommunications Union |pages = 4|access-date=2025-01-12}}] for [radio frequencies](/source/radio_frequency) in the range between 300 megahertz (MHz) and 3 [gigahertz](/source/gigahertz) (GHz), also known as the '''decimetre band''' as the wavelengths range from one meter to one tenth of a meter (one decimetre). Radio waves with frequencies above the UHF band fall into the [super-high frequency](/source/super-high_frequency) (SHF) or [microwave](/source/microwave) frequency range. Lower frequency signals fall into the VHF ([very high frequency](/source/very_high_frequency)) or lower bands.
UHF radio waves propagate mainly by line of sight; they are blocked by hills and large buildings although the transmission through building walls is strong enough for indoor reception. They are used for television broadcasting, cell phones, satellite communication including GPS, [personal radio service](/source/personal_radio_service)s including Wi-Fi and [Bluetooth](/source/Bluetooth), [walkie-talkie](/source/walkie-talkie)s, cordless phones, [satellite phone](/source/satellite_phone)s, and numerous other applications.
The [IEEE](/source/Institute_of_Electrical_and_Electronics_Engineers) defines the UHF radar band as frequencies between 300 MHz and 1 GHz.[{{cite web|url=https://standards.ieee.org/ieee/521/768/|title=IEEE 521-2002 - IEEE Standard Letter Designations for Radar-Frequency Bands|website=[IEEE](/source/IEEE)|access-date=17 December 2017}}] Two other IEEE radar bands overlap the ITU UHF band: the [L band](/source/L_band) between 1 and 2 GHz and the [S band](/source/S_band) between 2 and 4 GHz.
[[File:UHF TV Antenna 001.JPG|thumb|UHF [television antenna](/source/television_antenna) on a residence. This type of antenna, called a [Yagi–Uda antenna](/source/Yagi%E2%80%93Uda_antenna), is widely used at UHF frequencies.]]
== Propagation characteristics ==
{{Main article|Radio propagation}}
Radio waves in the UHF band travel almost entirely by [line-of-sight propagation](/source/line-of-sight_propagation) (LOS) and ground reflection; unlike in the [HF](/source/High_frequency) band there is little to no reflection from the [ionosphere](/source/ionosphere) ([skywave](/source/skywave) propagation), or [ground wave](/source/ground_wave).[{{cite book
| last1 = Seybold
| first1 = John S.
| title = Introduction to RF Propagation
| publisher = John Wiley and Sons
| date = 2005
| pages = 55–58
| url = https://books.google.com/books?id=4LtmjGNwOPIC&q=cross+polarization+discrimination&pg=PA57
| isbn = 0471743682
}}] UHF radio waves are blocked by hills and cannot travel beyond the horizon, but can penetrate foliage and buildings for indoor reception. Since the [wavelength](/source/wavelength)s of UHF waves are comparable to the size of buildings, trees, vehicles and other common objects, reflection and [diffraction](/source/Knife-edge_effect) from these objects can cause [fading](/source/fading) due to [multipath propagation](/source/multipath_propagation), especially in built-up urban areas. Atmospheric moisture reduces, or [attenuates](/source/Attenuation), the strength of UHF signals over long distances, and the attenuation increases with frequency. UHF TV signals are generally more degraded by moisture than lower bands, such as [VHF](/source/Very_high_frequency) TV signals.
As the visual horizon sets the maximum range of UHF transmission to between 30 and 40 miles (48 to 64 km) or less, depending on local terrain, the same frequency channels can be reused by other users in neighboring geographic areas ([frequency reuse](/source/frequency_reuse)). Radio [repeater](/source/repeater)s are used to retransmit UHF signals when a distance greater than the line of sight is required.
Occasionally when conditions are right, UHF radio waves can travel long distances by [tropospheric ducting](/source/tropospheric_ducting) as the atmosphere warms and cools throughout the day.
==Antennas==
{{see also|UHF television broadcasting#UHF vs VHF}}
[[Image:Retevis RT49P GMRS version.jpg|thumb|Retevis [GMRS](/source/GMRS) [two-way radio](/source/two-way_radio)s operating on 462 and 467 MHz in the UHF band, showing the short antennas used]]
thumb|upright|Corner reflector UHF-TV antenna from 1950s
The length of an [antenna](/source/antenna_(radio)) is related to the length of the radio waves used. Due to the short wavelengths, UHF antennas are conveniently stubby and short; at UHF frequencies a [quarter-wave monopole](/source/monopole_antenna), the most common [omnidirectional antenna](/source/omnidirectional_antenna) is between 2.5 and 25 cm long. UHF wavelengths are short enough that efficient transmitting antennas are small enough to mount on handheld and mobile devices, so these frequencies are used for two-way [land mobile radio system](/source/land_mobile_radio_system)s, such as [walkie-talkie](/source/walkie-talkie)s, [two-way radios](/source/Two-way_radio) in vehicles, and for portable [wireless device](/source/wireless_device)s; [cordless phone](/source/cordless_phone)s and [cell phone](/source/cell_phone)s. Omnidirectional UHF antennas used on mobile devices are usually short [whips](/source/whip_antenna), sleeve [dipoles](/source/dipole_antenna), [rubber ducky antenna](/source/rubber_ducky_antenna)s or the planar [inverted F antenna](/source/inverted_F_antenna) (PIFA) used in cellphones. Higher gain omnidirectional UHF antennas can be made of [collinear arrays](/source/collinear_antenna_array) of dipoles and are used for mobile base stations and [cellular base station antennas](/source/sector_antenna).
The short wavelengths also allow [high gain antennas](/source/directional_antenna) to be conveniently small. High gain antennas for [point-to-point](/source/point-to-point_(telecommunications)) communication links and UHF television reception are usually [Yagi](/source/Yagi-Uda_antenna), [log periodic](/source/log_periodic_antenna), [corner reflectors](/source/corner_reflector_antenna), or [reflective array antenna](/source/reflective_array_antenna)s. At the top end of the band, [slot antenna](/source/slot_antenna)s and [parabolic dishes](/source/parabolic_antenna) become practical. For satellite communication, [helical](/source/helical_antenna) and [turnstile antenna](/source/turnstile_antenna)s are used since satellites typically employ [circular polarization](/source/circular_polarization) which is not sensitive to the relative orientation of the transmitting and receiving antennas. For television broadcasting specialized vertical radiators that are mostly modifications of the slot antenna or reflective array antenna are used: the slotted cylinder, zig-zag, and panel antennas.
==Applications==
[UHF television broadcasting](/source/UHF_television_broadcasting) channels are used for [digital television](/source/digital_television), although much of the former bandwidth has been reallocated to [land mobile radio system](/source/land_mobile), [trunked radio](/source/Terrestrial_Trunked_Radio) and [mobile telephone](/source/mobile_telephone) use.
Since at UHF frequencies transmitting antennas are small enough to install on portable devices, the UHF spectrum is used worldwide for land mobile radio systems, [two-way radio](/source/two-way_radio)s used for voice communication for commercial, industrial, public safety, and military purposes. Examples of [personal radio services](/source/Personal_radio_service) are [GMRS](/source/General_Mobile_Radio_Service), [PMR446](/source/PMR446), and [UHF CB](/source/UHF_CB).
The most rapidly-expanding use of the band is [Wi-Fi](/source/Wi-Fi) ([wireless LAN](/source/wireless_LAN)) networks in homes, offices, and public places. Wi-Fi [IEEE 802.11](/source/IEEE_802.11) low band operates between 2412 and 2484 MHz. A second widespread use is for [cellphone](/source/cellphone)s, allowing handheld mobile phones be connected to the [public switched telephone network](/source/public_switched_telephone_network) and the [Internet](/source/Internet). Current [3G](/source/3G) and [4G](/source/4G) [cellular network](/source/cellular_network)s use UHF, the frequencies varying among different carriers and countries. [Satellite phone](/source/Satellite_phone)s also use this frequency in the [L band](/source/L_band) and [S band](/source/S_band).
== Examples of UHF frequency allocations ==
===Australia===
* 406–406.1 MHz: Mobile satellite service[{{Cite web|url=https://www.acma.gov.au/-/media/Spectrum-Engineering/Information/pdf/Radiocommunications-Assignment-and-Licensing-Instruction-RALI-MS22-400-MHz-Plan.pdf|title=400 MHz Plan|website=acma.gov|url-status=dead|archive-url=https://web.archive.org/web/20190404175218/https://www.acma.gov.au/-/media/Spectrum-Engineering/Information/pdf/Radiocommunications-Assignment-and-Licensing-Instruction-RALI-MS22-400-MHz-Plan.pdf|archive-date=April 4, 2019|access-date=November 3, 2019}}]
* 450.4875–451.5125 MHz: Fixed point-to-point link
* 457.50625–459.9875 MHz: Land mobile service
* 476–477 MHz: [UHF citizens band](/source/UHF_CB) (land mobile service)
* 503–694 MHz: [UHF channels](/source/Australian_and_New_Zealand_television_frequencies) for television broadcasting
===Canada===
* 430–450 MHz: Amateur radio (70 cm band)
* 470–806 MHz: [Terrestrial television](/source/Terrestrial_television) (with select channels in the 600 and 700 MHz bands left vacant)
* 1452–1492 MHz: [Digital Audio Broadcasting](/source/Digital_Audio_Broadcasting) ([L band](/source/L_band))[{{cite web|url=https://www.broadcasting-history.ca/digital-audio-broadcasting-dab|title=Digital Audio Broadcasting (DAB) - History of Canadian Broadcasting|website=Broadcasting-history.ca|access-date=15 October 2017|archive-date=15 October 2017|archive-url=https://web.archive.org/web/20171015203229/https://www.broadcasting-history.ca/digital-audio-broadcasting-dab|url-status=dead}}]
* Many other frequency assignments for Canada and Mexico are similar to their US counterparts
===France===
* 380-400 MHz: [Terrestrial Trunked Radio for Police](/source/TETRAPOL)
* 430-440 MHz: Amateur radio ([70 cm band](/source/70-centimeter_band))
*446.0–446.2 MHz : European unlicensed PMR service, [PMR446](/source/PMR446)
* 470-694 MHz: [Terrestrial television](/source/Terrestrial_television)
===New Zealand===
* 406.1–420 MHz: Land mobile service
* 430–440 MHz: [Amateur radio](/source/Amateur_radio) ([70 cm band](/source/70-centimeter_band)) and [amateur radio satellite](/source/amateur_radio_satellite)
* 476–477 MHz: [PRS](/source/UHF_CB) Personal Radio Service (Land mobile service)
* 485–502 MHz: Analog and [P25](/source/Project_25) emergency services use
* 510–622 MHz: [Terrestrial television](/source/Terrestrial_television)
* 960–1215 MHz: [Aeronautical radionavigation](/source/Aeronautical_radionavigation_service)
* 1240–1300 MHz: Amateur radio ([23 cm band](/source/23-centimeter_band))
===United Kingdom===
*380–399.9 MHz: [Terrestrial Trunked Radio](/source/Terrestrial_Trunked_Radio) (TETRA) service for emergency use
*430–440 MHz: Amateur radio ([70 cm band](/source/70-centimeter_band))
*446.0–446.2 MHz : European unlicensed PMR service, [PMR446](/source/PMR446)
*457–464 MHz: Scanning telemetry and telecontrol, assigned mostly to the water, gas, and electricity industries
*606–614 MHz: Radio microphones and radio-astronomy
*470–862 MHz: Previously used for [analogue TV channels 21–69](/source/Analogue_terrestrial_television_in_the_United_Kingdom) (until 2012).
**Currently channels 21 to 37 and 39 to 48 are used for [Freeview](/source/Freeview_(UK)) digital TV.[{{cite web |title=What is 700MHz Clearance? |url=https://www.freeview.co.uk/corporate/platform-management/700mhz-clearance |website=Freeview }}{{Dead link|date=September 2025 |bot=InternetArchiveBot }}] Channels 55 to 56 were previously used by temporary muxes COM7 and COM8, channel 38 was used for radio astronomy but has been cleared to allow [PMSE](/source/Programme_making_and_special_events) users access on a licensed, shared basis.
**694–790 MHz:[{{cite web |title=Decision to make the 700 MHz band available for mobile data - statement |url=https://www.ofcom.org.uk/__data/assets/pdf_file/0024/46923/700-mhz-statement.pdf |access-date=4 April 2020}}] i.e. channels 49 to 60 have been cleared, to allow these channels to be allocated for 5G cellular communication.
**791–862 MHz,[{{cite web|url=http://stakeholders.ofcom.org.uk/spectrum/spectrum-awards/awards-archive/completed-awards/800mhz-2.6ghz/|title=800 MHz & 2.6 GHz Combined Award|date=May 9, 2012|publisher=The Office of Communications|access-date=2014-11-21}}] i.e. channels 61 to 69 inclusive were previously used for licensed and shared wireless microphones (channel 69 only), has since been allocated to 4G cellular communications.
*863–865 MHz: Used for licence-exempt wireless systems.
*863–870 MHz: [Short range devices](/source/Short_Range_Devices), [LPWAN](/source/LPWAN) [IoT](/source/Internet_of_things) devices such as [NarrowBand-IoT](/source/NarrowBand_IOT).
*870–960 MHz: Cellular communications (GSM900 - Vodafone and O2 only) including GSM-R and future TETRA
*1240–1325 MHz: Amateur radio ([23 cm band](/source/23-centimeter_band))
*1710–1880 MHz: [2G](/source/2G) cellular communications (GSM1800)
*1880–1900 MHz: [DECT](/source/Digital_Enhanced_Cordless_Telecommunications) [cordless telephone](/source/cordless_telephone)
*1900–1980 MHz: [3G](/source/3G) cellular communications (mobile phone uplink)
*2110–2170 MHz: 3G cellular communications (base station downlink)
*2310–2450 MHz: Amateur radio ([13 cm band](/source/13-centimeter_band))
===United States===
UHF channels are used for [digital television broadcasting](/source/digital_television_transition_in_the_United_States) on both [over the air channels](/source/North_American_broadcast_television_frequencies) and [cable television channels](/source/North_American_cable_television_frequencies). Since 1962, UHF channel tuners (at the time, channels 14 to 83) have been required in television receivers by the [All-Channel Receiver Act](/source/All-Channel_Receiver_Act). However, because of their more limited range, and because few sets could receive them until older sets were replaced, UHF channels were less desirable to broadcasters than [VHF](/source/VHF) channels (and licenses sold for lower prices).
A complete list of US television frequency allocations can be found at [Pan-American television frequencies](/source/Pan-American_television_frequencies).
There is a considerable amount of lawful unlicensed activity (cordless phones, wireless networking) clustered around 900 MHz and 2.4 GHz, regulated under [Title 47 CFR Part 15](/source/Title_47_CFR_Part_15). These [ISM band](/source/ISM_band)s—frequencies with a higher unlicensed power permitted for use originally by industrial, scientific and medical apparatus—are now some of the most crowded in the spectrum because they are open to everyone. The 2.45 GHz frequency is the standard for use by [microwave oven](/source/microwave_oven)s, adjacent to the frequencies allocated for [Bluetooth](/source/Bluetooth) network devices.
The spectrum from 806 MHz to 890 MHz (UHF channels 70 to 83) was taken away from TV broadcast services in 1983, primarily for [analog mobile telephony](/source/advanced_Mobile_Phone_System).
In 2009, as part of the [transition from analog to digital over-the-air broadcast of television](/source/Digital_television), the spectrum from 698 MHz to 806 MHz (UHF channels 52 to 69) was removed from TV broadcasting, making it available for other uses. Channel 55, for instance, was sold to [Qualcomm](/source/Qualcomm) for their [MediaFLO](/source/MediaFLO) service, which was later sold to [AT&T](/source/AT%26T), and discontinued in 2011. Some US broadcasters had been offered incentives to vacate this channel early, permitting its immediate mobile use. The [FCC](/source/Federal_Communications_Commission)'s scheduled [auction for this newly available spectrum](/source/United_States_2008_wireless_spectrum_auction) was completed in March 2008.[{{cite web|url=http://bits.blogs.nytimes.com/2008/03/18/going-oncegoing-twicethe-700-mhz-spectrum-is-sold/?ref=technology|title=Going Once…Going Twice…The 700 Mhz Spectrum is Sold|last=Hansell|first=Saul|date=March 18, 2008|website=Bits.blos.nytimes.com|access-date=15 October 2017}}]
*225–420 MHz: Government use, including [meteorology](/source/meteorology), military aviation, and federal two-way use[[http://www.raytheon.com/capabilities/rtnwcm/groups/ncs/documents/content/rtn_ncs_products_arc164_pdf.pdf] {{dead link|date=December 2017}}]
*420–450 MHz: Government radiolocation, [amateur radio satellite](/source/amateur_radio_satellite) and [amateur radio](/source/amateur_radio) ([70 cm band](/source/70-centimeter_band)), [MedRadio](/source/MedRadio)[{{Cite web |url=https://www.ntia.doc.gov/page/federal-government-spectrum-use-reports-225-mhz-7125-ghz |title=Federal Government Spectrum Use Reports 225 MHz – 7.125 GHz |publisher=[NTIA](/source/NTIA) |date=Dec 2015 – Aug 2017 |access-date=October 21, 2019}}]
*450–470 MHz: UHF business band, [General Mobile Radio Service](/source/General_Mobile_Radio_Service), and [Family Radio Service](/source/Family_Radio_Service) 2-way "walkie-talkies", public safety
*470–512 MHz: Low-band TV channels 14 to 20 (shared with public safety [land mobile](/source/land_mobile) 2-way radio in 12 major metropolitan areas scheduled to relocate to 700 MHz band by 2023[{{Cite web|url=http://www.npstc.org/download.jsp?tableId=37&column=217&id=2678&file=T_Band_Report_20130315.pdf|title=T-Band Report|date=March 15, 2013|website=NPSTC |access-date=17 December 2017}}])
*512–608 MHz: Medium-band TV channels 21 to 36
*608–614 MHz: [Channel 37](/source/Channel_37) used for [radio astronomy](/source/radio_astronomy) and wireless medical telemetry[{{Cite web |date= March 8, 2017 |title=Wireless Medical Telemetry Service (WMTS) |url=https://www.fcc.gov/wireless/bureau-divisions/broadband-division/wireless-medical-telemetry-service-wmts |access-date=17 December 2017 |website=Federal Communications Commission}}]
*614–698 MHz: Mobile broadband shared with TV channels 38 to 51 [auctioned in April 2017](/source/2008_United_States_wireless_spectrum_auction). TV stations were relocated by 2020.
**617–652 MHz: Mobile broadband service downlink
**652–663 MHz: Wireless microphones (higher priority) and unlicensed devices (lower priority)
**663–698 MHz: Mobile broadband service uplink
*698–806 MHz: [Was auctioned in March 2008](/source/United_States_2008_wireless_spectrum_auction); bidders got full use after the transition to [digital TV](/source/Digital_television) was completed on June 12, 2009 (formerly high-band UHF TV channels 52 to 69) and recently modified in 2021 for [5G](/source/5G) UHF transmission bandwidth for 'over the air' channels 2 through 69 (virtual 1 through 36).
*806–816 MHz: Public safety and commercial 2-way (formerly TV channels 70 to 72)
*817–824 MHz: ESMR band for wideband mobile services (mobile phone) (formerly public safety and commercial 2-way)
*824–849 MHz: Cellular A and B franchises, terminal (mobile phone) (formerly TV channels 73 to 77)
*849–851 MHz: Commercial aviation air-ground systems
*851–861 MHz: Public safety and commercial 2-way (formerly TV channels 77 to 80)
*862–869 MHz: ESMR band for wideband mobile services (base station) (formerly public safety and commercial 2-way)
*869–894 MHz: Cellular A and B franchises, base station (formerly TV channels 80 to 83)
*894–896 MHz: Commercial aviation air-ground systems
*896–901 MHz: Commercial 2-way radio
*901–902 MHz: Narrowband PCS: commercial narrowband mobile services
*902–928 MHz: [ISM band](/source/ISM_band), amateur radio ([33 cm band](/source/33-centimeter_band)), cordless phones and stereo, [radio-frequency identification](/source/radio-frequency_identification), datalinks
*928–929 MHz: [SCADA](/source/SCADA), alarm monitoring, meter reading systems and other narrowband services for a company's internal use
*929–930 MHz: Pagers
*930–931 MHz: Narrowband PCS: commercial narrowband mobile services
*931–932 MHz: Pagers
*932–935 MHz: Fixed microwave services: distribution of video, audio and other data
*935–940 MHz: Commercial 2-way radio
*940–941 MHz: Narrowband PCS: commercial narrowband mobile services
*941–960 MHz: Mixed studio-transmitter fixed links, [SCADA](/source/SCADA), other.
*960–1215 MHz: Aeronautical radionavigation
*1240–1300 MHz: Amateur radio ([23 cm band](/source/23-centimeter_band))
*1300–1350 MHz: Long range radar systems
*1350–1390 MHz: Military air traffic control and mobile telemetry systems at test ranges
*1390–1395 MHz: Proposed wireless medical telemetry service. [TerreStar](/source/TerreStar_Corporation) failed to provide service by the required deadline.[{{Cite web|url=http://transition.fcc.gov/Daily_Releases/Daily_Business/2017/db1010/DA-17-995A1.pdf|title=TerreStar Corporation Request for Temporary Waiver of Substantial Service Requirements for 1.4 GHz Licenses|date=2017-10-10|website=FCC|access-date=2017-10-11}}]
*1395–1400 MHz: Wireless medical telemetry service
*1400–1427 MHz: Earth exploration, radio astronomy, and space research
*1427–1432 MHz: Wireless medical telemetry service
*1432–1435 MHz: Proposed wireless medical telemetry service. [TerreStar](/source/TerreStar_Corporation) failed to provide service by the required deadline.[{{Cite web|url=https://www.fcc.gov/ecfs/file/download/1103057126216/Ligado%20Ex%20Parte%20re%20Iridium%20Analysis%20(PUBLIC%2011-2-2016).pdf|title=Ligado Ex Parte re Iridium Analysis (PUBLIC 11-2-2016)|website=Ecfsapi.fcc.gov|access-date=17 December 2017|archive-date=2022-08-19|archive-url=https://web.archive.org/web/20220819121343/https://www.fcc.gov/ecfs/file/download/1103057126216/Ligado%20Ex%20Parte%20re%20Iridium%20Analysis%20%28PUBLIC%2011-2-2016%29.pdf|url-status=dead}}])
**1526–1536 MHz: proposed Ligado downlink
**1536–1559 MHz: proposed guard band
*1559–1610 MHz: [Radio Navigation Satellite Services](/source/Radionavigation-satellite_service) (RNSS) Upper L-band
**1563–1587 MHz: [GPS](/source/Global_Positioning_System) L1 band
**1593–1610 MHz: [GLONASS](/source/GLONASS) G1 band
**1559–1591 MHz: [Galileo](/source/Galileo_(satellite_navigation)) E1 band (overlapping with GPS L1[{{Cite web|url=http://www.navipedia.net/index.php/GALILEO_Signal_Plan|title=Galileo Signal Plan|website=Navipedia |access-date=17 December 2017 |url-status=dead |archive-url=https://web.archive.org/web/20171223234718/http://www.navipedia.net/index.php/GALILEO_Signal_Plan |archive-date= Dec 23, 2017 }}])
*1610–1660.5 MHz: Mobile Satellite Service
**1610–1618: [Globalstar](/source/Globalstar) uplink
**1618–1626.5 MHz: [Iridium](/source/Iridium_satellite_constellation) uplink and downlink[{{Cite web|url=http://wireless2.fcc.gov/UlsApp/ApplicationSearch/applAdmin.jsp?applID=9585875#attachments|title=Request for waiver and public interest statement|date=2016-06-04|website=FCC|access-date=2018-04-02}}]
*1675–1695 MHz: Meteorological federal users
*1695–1780 MHz: [AWS](/source/Advanced_Wireless_Services) mobile phone uplink (UL) operating band
**1695–1755 MHz: AWS-3 blocks A1 and B1
**1710–1755 MHz: AWS-1 blocks A, B, C, D, E, F
**1755–1780 MHz: AWS-3 blocks G, H, I, J (various federal agencies transitioning by 2025[{{Cite web|url=https://www.ntia.doc.gov/category/aws-3-transition|title=AWS-3 Transition|date=January 29, 2015|website=Ntia.doc.gov|access-date=17 December 2017}}])
*1780–1850 MHz: exclusive federal use (Air Force satellite communications, Army's cellular-like communication system, other agencies)
*1850–1920 MHz: PCS mobile phone—order is A, D, B, E, F, C, G, H blocks. A, B, C = 15 MHz; D, E, F, G, H = 5 MHz
*1920–1930 MHz: [DECT](/source/Digital_Enhanced_Cordless_Telecommunications) [cordless telephone](/source/cordless_telephone)
*1930–2000 MHz: PCS base stations—order is A, D, B, E, F, C, G, H blocks. A, B, C = 15 MHz; D, E, F, G, H = 5 MHz
*2000–2020 MHz: lower AWS-4 downlink (mobile broadband)
*2020–2110 MHz: Cable antenna relay service, local television transmission service, TV broadcast auxiliary service, Earth exploration satellite service
*2110–2200 MHz: [AWS](/source/Advanced_Wireless_Services) mobile broadband downlink
**2110–2155 MHz: AWS-1 blocks A, B, C, D, E, F
**2155–2180 MHz: AWS-3 blocks G, H, I, J
**2180–2200 MHz: upper AWS-4
*2200–2290 MHz: [NASA](/source/NASA) satellite tracking, telemetry and control (space-to-Earth, space-to-space)
*2290–2300 MHz: [NASA Deep Space Network](/source/NASA_Deep_Space_Network)
*2300–2305 MHz: Amateur radio ([13 cm band](/source/13-centimeter_band), lower segment)
*2305–2315 MHz: WCS mobile broadband service uplink blocks A and B
*2315–2320 MHz: WCS block C (AT&T is pursuing [smart grid](/source/smart_grid) deployment[{{Cite web|url=https://www.fcc.gov/ecfs/file/download/011844558710/DA-17-78A1.pdf|title=AT&T Mobility Petition for Limited Waiver of Interim Performance Requirement for 2.3 GHz WCS C and D Block Licenses|website=Ecfsapi.fcc.gov|access-date=17 December 2017|archive-date=3 July 2022|archive-url=https://web.archive.org/web/20220703183706/https://www.fcc.gov/ecfs/file/download/011844558710/DA-17-78A1.pdf|url-status=dead}}])
*2320–2345 MHz: [Satellite radio](/source/Satellite_radio)
*2345–2350 MHz: WCS block D (AT&T is pursuing [smart grid](/source/smart_grid) deployment[{{Cite web|url=https://www.globalstar.com/Globalstar/media/Globalstar/Downloads/Spectrum/GlobalstarOverviewPresentation.pdf|title=Globalstar Overview|date=2017|website=Globalstar.com|url-status=live|archive-url=https://web.archive.org/web/20170802042513/https://www.globalstar.com/en/ir/docs/GlobalstarOverviewPresentation.pdf|archive-date=August 2, 2017|access-date=17 December 2017}}]
*2495–2690 MHz: Educational broadcast and broadband radio Services[{{Cite web|url=https://www.fcc.gov/wireless/bureau-divisions/broadband-division/broadband-radio-service-education-broadband-service|title=Broadband Radio Service & Education Broadband Service|website=The FCC|date=February 2016|access-date=2018-06-05}}{{Dead link|date=September 2025 |bot=InternetArchiveBot }}]
*2690–2700 MHz: Receive-only range for radio astronomy and space research
==See also==
*[Digital Audio Broadcasting](/source/Digital_Audio_Broadcasting) and its [regional implementations](/source/regional_implementations_of_DAB)
*[Digital terrestrial television](/source/Digital_terrestrial_television)
*[The Thing (listening device)](/source/The_Thing_(listening_device))
==References==
{{reflist}}
== External links ==
*[http://www.jneuhaus.com/fccindex/cablech.html U.S. cable television channel frequencies]
*Tomislav Stimac, "''[http://www.vlf.it/frequency/bands.html Definition of frequency bands (VLF, ELF... etc.)]''". IK1QFK Home Page (vlf.it).
{{Radio spectrum}}
{{Electromagnetic spectrum}}
{{Analogue TV transmitter topics}}
{{Telecommunications}}
{{Audio broadcasting}}
{{Authority control}}
Category:Radio spectrum
Category:Television technology
Category:Wireless
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Adapted from the Wikipedia article [Ultra high frequency](https://en.wikipedia.org/wiki/Ultra_high_frequency) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Ultra_high_frequency?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.