Editing Very high frequency (section)

{{Short description|Electromagnetic wave range of 30–300 MHz}}
{{redirect|VHF|the diseases|Viral hemorrhagic fever}}
[[File:Antenna.jpg|thumb|VHF [[television antenna]]s used for [[broadcast television]] reception.  These six antennas are a type known as a [[Yagi-Uda antenna|Yagi antenna]], which is widely used on VHF.]]
{{MWband
| freq = 30 [[megahertz|MHz]] to 300 [[megahertz|MHz]]
| wave = 10 to 1 m
| bands = 
}}

'''Very high frequency''' ('''VHF''') is the [[International Telecommunication Union|ITU]] designation<ref name="Belov">{{cite book
  | last1 = Belov
  | first1 = Leonid A.
  | last2  = Smolskiy
  | first2 = Sergey M.
  | last3  = Kochemasov
  | first3 = Viktor Neofidovich
  | title = Handbook of RF, Microwave, and Millimeter-wave Components
  | publisher = Artech House
  | date = 2012
  | location = 
  | pages = 27
  | language = 
  | url = https://books.google.com/books?id=bHhYjINB6KMC&pg=PA27
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  | doi = 
  | id = 
  | isbn = 9781608072095
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  | jfm =}}</ref><ref name="1037B">{{cite book
  | title = US Federal Standard 1037B: Telecommunications, Glossary of Telecommunications Terms 
  | publisher = Office of Technology Standards, General Services Administration
  | series = 
  | volume = 
  | edition = 
  | date = 3 June 1991
  | location = 
  | pages = S-18
  | language = 
  | url = https://books.google.com/books?id=zYLXU4fkD34C&pg=RA15-PA18
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  | jfm =}}</ref><ref name="itu-2015-acts">{{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}}</ref> for the range of [[radio frequency]] [[electromagnetic wave]]s ([[radio wave]]s) from 30 to 300 [[megahertz]] (MHz), with corresponding wavelengths of ten meters to one meter. 
Frequencies immediately below VHF are denoted [[high frequency]] (HF), and the next higher frequencies are known as [[ultra high frequency]] (UHF).

VHF radio waves propagate mainly by [[line-of-sight propagation|line-of-sight]], so they are blocked by hills and mountains, although due to refraction they can travel somewhat beyond the [[horizon|visual horizon]] out to about 160&nbsp;km (100 miles).  Common uses for radio waves in the VHF band are [[Digital Audio Broadcasting]] (DAB) and [[FM radio]] broadcasting, [[Terrestrial television|television broadcasting]], [[two-way radio|two-way]] [[land mobile radio system]]s (emergency, business, private use and military), long range [[data communication]] up to several tens of kilometers with [[radio modem]]s, [[amateur radio]], and [[marine VHF radio|marine communications]]. [[Air traffic control]] communications and air navigation systems (e.g. [[VHF omnidirectional range|VOR]] and [[Instrument landing system|ILS]]) work at distances of {{convert|100|km|miles}}  or more to aircraft at cruising altitude.

In the Americas and many other parts of the world, VHF [[Band I]] was used for the transmission of [[analog television]]. As part of the worldwide [[digital television transition|transition to digital terrestrial television]] most countries require broadcasters to air television in the VHF range using digital, rather than analog encoding.