- See ultrahigh frequency.Also, uhf.
* * *abbreviation of Ultrahigh Frequency,conventionally defined portion of the electromagnetic spectrum, encompassing radiations having a wavelength between 0.1 and 1 m and a frequency between 3,000 and 300 megahertz. UHF signals are used extensively in televison broadcasting. UHF waves typically carry televison signals on channels 14 through 83.UHF waves are very weakly reflected by the ionized layers of the upper atmosphere. Therefore, unlike longer waves, they bend very little around the curvature of the Earth and are easily obstructed by tall buildings and mountains. They can, however, be concentrated into narrow, highly directional signal beams. These characteristics make UHF suitable for line-of-sight applications that require high accuracy. Besides their use in television broadcasting, UHF waves are utilized in ship and aircraft navigation systems and for certain types of police communications. In some instances, radio communications between spacecraft and Earth-based tracking stations are carried via UHF signals. See also VHF.
* * *
Look at other dictionaries:
UHF CB — is a class licensed (meaning licence free use for most users) citizen s band radio service authorised by the governments of Australia and New Zealand in the UHF 477 MHz band. UHF CB provides 40 channels, including 16 channels (8 output, 8 input)… … Wikipedia
UHF — steht für: die Abkürzung von Ultra High Frequency, siehe Dezimeterwelle uniformly hyperfinite (engl.) Begriff im mathematischen Teilgebiet der Funktionalanalysis, siehe UHF Algebra den Titel des US amerikanischen Spielfilms UHF, siehe UHF –… … Deutsch Wikipedia
UHF — (el. uhf) (fork. for ultra high frequency) … Dansk ordbog
UHF — or uhf abbrev. ultrahigh frequency … English World dictionary
UHF — Ultrahigh frequency Short Dictionary of (mostly American) Legal Terms and Abbreviations … Law dictionary
UHF — ● UHF Abréviation de l anglais Ultra High Frequencies, parfois utilisée pour désigner les fréquences comprises entre 300 et 3 000 MHz et correspondant aux ondes décimétriques … Encyclopédie Universelle
UHF — sigla ES ingl. Ultra High Frequencies, frequenze ultra alte … Dizionario italiano
UHF — [ˌju: eıtʃ ˈef] n [U] ultra high frequency a range of radio waves that produces a very good quality of sound … Dictionary of contemporary English
UHF — Abk. für engl. ultra high frequency »Ultrahochfrequenz«> Bez. für den Frequenzbereich von 300 bis 3000 MHZ … Das große Fremdwörterbuch
UHF — [ ,ju eıtʃ ef ] abbreviation Ultra High Frequency: a range of radio waves used for broadcasting television programs … Usage of the words and phrases in modern English
UHF — 1937, abbreviation of ultra high frequency (1932) in reference to radio frequencies in the range of 300 to 3,000 megahertz … Etymology dictionary