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http://dbpedia.org/ontology/abstract El término radiofrecuencia (RF) (también, El término radiofrecuencia (RF) (también, espectro de radiofrecuencia) se aplica a la porción menos energética del espectro electromagnético, situada entre los 3 hercios (Hz) y 300 gigahercios (GHz).​ El hercio es la unidad de medida de la frecuencia de las ondas, y corresponde a un ciclo por segundo.​ Las ondas electromagnéticas de esta región del espectro, se pueden transmitir aplicando la corriente alterna originada en un generador a una antena.na originada en un generador a una antena. , Radio frequency (RF) is the oscillation raRadio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around 20 kHz to around 300 GHz. This is roughly between the upper limit of audio frequencies and the lower limit of infrared frequencies; these are the frequencies at which energy from an oscillating current can radiate off a conductor into space as radio waves. Different sources specify different upper and lower bounds for the frequency range. and lower bounds for the frequency range. , Częstotliwość radiowa, RF (od ang. radio frequency) – częstotliwość drgań elektromagnetycznych stosowanych w szeroko rozumianej radiotechnice. W zakres częstotliwości radiowych wchodzą drgania o zakresie od 3 kHz do 300 GHz. , Una radiofrequenza, nota anche con la siglUna radiofrequenza, nota anche con la sigla RF, indica generalmente un segnale elettrico o un'onda elettromagnetica ad alta frequenza che si propaga nello spazio o in un cavo coassiale. Viene spesso utilizzato per specificare circuiti o sistemi elettronici che elaborano e gestiscono segnali elettromagnetici ad alta frequenza (es. "amplificatore a RF", "stadio RF"). Nel caso di segnali via etere, con radiofrequenza si intendono onde elettromagnetiche di frequenza compresa tra qualche Hz e 300 GHz. Le lunghezze d'onda variano da 100000 km (da 3 Hz) a 1 mm (a 300 GHz).da 100000 km (da 3 Hz) a 1 mm (a 300 GHz). , 高周波(こうしゅうは)とは、電波、音波など、波形を構成するスペクトラムのうち比較的周波数の高いものを指す。音波の場合は、超音波と呼ばれることが多い。 「高周波」あるいは「低周波」は周波数に関する事項ではあるが、慣習上、「周波」と言い換えている。 高周波という言葉だけでは周波数の定義は曖昧であり、人間が感知できる高音や超音波から無線周波数まで示す。 , Ραδιοσυχνότητα είναι μια ταλάντωση που μετΡαδιοσυχνότητα είναι μια ταλάντωση που μεταδίδεται με την ταχύτητα του φωτός, ένα ηλεκτρομαγνητικό κύμα στην περιοχή των χαμηλότερων συχνοτήτων ή των μεγαλύτερων μηκών κύματος του ηλεκτρομαγνητικού φάσματος (100000-10m). Σε αυτή την περιοχή συχνοτήτων έγιναν τα πρώτα πειράματα εκπομπής και λήψης ηλεκτρομαγνητικών κυμάτων και αυτή η περιοχή χρησιμοποιήθηκε για τις ραδιοφωνικές εκπομπές γεγονός στο οποίο οφείλεται η ονομασία. Σήμερα ο όρος ραδιοσυχνότητα χρησιμοποιείται για όλη τη περιοχή του ηλεκτρομαγνητικού φάσματος από την αρχή του μέχρι την περιοχή των υπερύθρων (100000-0,001m). Ραδιοσυχνότητες εκτός από εμπορική χρήση (ραδιόφωνο, δορυφορική επικοινωνία, τηλεόραση, κινητή τηλεφωνία, σταθερή τηλεφωνία και ίντερνετ) χρησιμοποιούνται και από τα σώματα ασφαλείας και πρόνοιας (στρατός, αστυνομία, πυροσβεστική, ασθενοφόρα, μέσα μαζικής μεταφοράς) συνήθως με τεχνολογία . * Στην κινητή τηλεφωνία οι ραδιοσυχνότητες χωρίζονται σε μικροκυματικές (IF ή MW-microwave) και Radio (RF). Οι μικροκυματικές συχνότητες έχουν υψηλή κατευθυντικότητα και χρησιμοποιούνται για την ζεύξη των σταθμών βάσης της κινητής τηλεφωνίας. Το Radio χωρίζετε σε GSM, (3G) και LTE (4G) και χρησιμοποιείται για την σύνδεση των κινητών τηλεφώνων με τον αντίστοιχο σταθμό βάσης. Οι ραδιοσυχνότητες που χρησιμοποιούνται στην Ελλάδα ελέγχονται από την Εθνική Επιτροπή Τηλεπικοινωνιών και Ταχυδρομείων ΕΕΤΤ. Οι πάροχοι έχουν αγοράσει μια συγκεκριμένη ζώνη συχνοτήτων για να εκπέμψουν. Με αυτό τον τρόπο αποτρέπεται η παρεμβολή σε γειτονικό σταθμό και εξασφαλίζετε η ποιότητα των δεδομένων.και εξασφαλίζετε η ποιότητα των δεδομένων. , S'anomena radiofreqüència o ones de ràdio S'anomena radiofreqüència o ones de ràdio (RF) la part de l'espectre electromagnètic en què les ones electromagnètiques es poden generar mitjançant un corrent altern aplicat a una antena i tradicionalment s'han utilitzat per a la comunicació. El terme radiofreqüència (abreujat RF), també denominat espectre de radiofreqüència, s'aplica a la porció menys energètica de l'espectre electromagnètic, situada entre 3 hertz (Hz) i 300 gigahertz (GHz). L'hertz és la unitat de mesura de la freqüència de les ones, i correspon a un cicle per segon. Les ones electromagnètiques d'aquesta regió de l'espectre, es poden transmetre aplicant el corrent altern originat en un generador a una antena.ern originat en un generador a una antena. , Altfrekvenco, aŭ radiofrekvenco, estas eleAltfrekvenco, aŭ radiofrekvenco, estas elektromagnetondaj frekvencoj, kiuj troviĝas inter 3 KHz ĝis 300 GHz, inkludas tiujn frekvencojn uzitaj en radiofonia komunikado aŭ radaroj. Ili estas proksimume inter la supra limo de aŭdaj frekvencoj kaj la pli malalta limo de infraruĝaj frekvencoj.pli malalta limo de infraruĝaj frekvencoj. , 射頻(英語:Radio frequency,縮寫為RF)又稱無線電頻率、無線射頻、高射頻(英語:Radio frequency,縮寫為RF)又稱無線電頻率、無線射頻、高周波,為在 3kHz至 300GHz這個範圍內的振盪頻率,這個頻率相當於無線電波的頻率,以及攜帶著無線電信號的交流電的頻率 。RF通常被用來指電子振盪,而不被用在機械振盪上,然而機械射頻系統仍然是存在的(如機械濾波器與)。 雖然射頻在定義上是用來指一種頻率,但在日常使用中,常被用來當成無線電的同義詞,以利描述無線通訊系統,如射頻識別。 在國際電信聯盟定義的無線電頻率劃分當中: * 甚低頻(VLF):3~30千赫(kHz) * 低頻(LF):30~300千赫(kHz) * 中頻(MF):300~3000千赫(kHz) * 高頻(HF):3~30兆赫(MHz) * 甚高頻(VHF):30~300兆赫(MHz) * 特高頻(UHF):300~3000兆赫(MHz) * 超高頻(SHF):3~30吉赫(GHz) * 極高頻(EHF):30~300吉赫(GHz)SHF):3~30吉赫(GHz) * 極高頻(EHF):30~300吉赫(GHz) , Radiofrequência (RF) é a faixa de frequêncRadiofrequência (RF) é a faixa de frequência que abrange aproximadamente de 3 kHz a 300 GHz e que corresponde à frequência das ondas de rádio. RF geralmente se refere a oscilações eletromagnéticas ao invés de mecânicas nessa faixa de frequência, embora existam sistemas mecânicos em RF., embora existam sistemas mecânicos em RF. , Frekuensi radio (bahasa Inggris: Radio freFrekuensi radio (bahasa Inggris: Radio frequency; RF) adalah tingkat osilasi dari arus atau tegangan listrik bolak-balik; atau dari medan magnet, listrik, atau elektromagnetik; atau dari sistem mekanis dalam rentang frekuensi dari kira-kira 20 kHz hingga kira-kira 300 . Frekuensi radio mengacu kepada spektrum elektromagnetik di mana gelombang elektromagnetik dapat dihasilkan oleh pemberian arus bolak-balik ke sebuah antena.mberian arus bolak-balik ke sebuah antena. , Le terme radio-fréquence (souvent abrégé eLe terme radio-fréquence (souvent abrégé en RF) désigne une fréquence d'onde électromagnétique située entre 3 kHz et 300 GHz (entre 3 × 103 et 3 × 1011 Hz), ce qui inclut les fréquences utilisées par différents moyens de radiocommunication, notamment la téléphonie mobile, le Wi-Fi ou la radiodiffusion, ainsi que des signaux destinés à d'autres usages comme les radars ou les fours à micro-ondes. Les ondes utilisant de telles fréquences sont les ondes radio. L'électronique dédiée au traitement des signaux RF constitue un domaine bien particulier de l'électrotechnique qui couvre à la fois l'émission et la réception de ces signaux par des antennes et leur traitement analogique et/ou numérique mais aussi la conception physique des circuits, une particularité des ondes RF étant en effet de se propager à la fois dans les milieux conducteurs (câbles, composants, etc.) mais aussi dans l'espace environnant.tc.) mais aussi dans l'espace environnant. , Vysokofrekvenční, VF (anglicky Radio FrequVysokofrekvenční, VF (anglicky Radio Frequency, RF) je v elektronice a radiotechnice termín používaný nejčastěji pro kmitočty nad oblastí slyšitelných zvukových vln, které se nazývají nízkofrekvenční (NF). V akustice se toto frekvenční pásmo nazývá ultrazvuk. V různých kontextech se používají i jiné definice pro termín vysokofrekvenční: * V elektroakustice se za vysokofrekvenční považují signály s frekvencí nad 20 kHz. * V medicíně se jako vysokofrekvenční (HF) označují již frekvence vyšší než 1 kHz. * Mezinárodní rozdělení rádiových pásem začíná na frekvenci 9 kHz. * Zkratka HF (anglicky High Frequency) se používá pro rádiové pásmo krátkých (dekametrových) vln (KV) s kmitočty 3-30 MHz. * Někdy se toto označení rozšiřuje i na všechna pásma s kratšími vlnovými délkami o kmitočtech v rozsahu od 3 MHz do 300 GHz. * V přijímací technice se přívlastek „vysokofrekvenční“ používá pro přijímaný signál a část přijímače, která tento signál zpracovává (vysokofrekvenční stupeň), pro rozlišení od mezifrekvenčního a nízkofrekvenčního stupně a signálu. Podle jiného pojetí závisí hranice mezi nízkofrekvenční a vysokofrekvenční technikou na rozměrech použitých komponent. Bývalý navigační systém OMEGA, který pracoval na frekvenci 10 až 14 kHz, lze považovat za vysokofrekvenční systém, stejně jako vedení elektrického proudu o kmitočtu 50 Hz a délce přes 1000 km musí být podle přenosové linkové teorie považováno za vysokofrekvenční systém, protože jeho délka je srovnatelná se čtvrtinou vlnové délky (λ/4) – viz Ferrantiho jev. Díky velkému dosahu se vysokofrekvenční technologie používají pro telekomunikace – pro mobilní telefony, vysílání rozhlasu a televize, radiolokaci a pro komunikaci s umělými družicemi. Naprostá většina rádiových komunikačních zařízení pracuje ve vysokofrekvenčním pásmu. Výjimkou jsou systémy pro komunikaci s ponorkami jako je americký systém Sanguine a ruský ZEVS. je americký systém Sanguine a ruský ZEVS. , Hochfrequenz (HF, englisch RF für radio frHochfrequenz (HF, englisch RF für radio frequency) ist in der Elektrotechnik die Bezeichnung für Frequenzen über denen von hörbaren Schallwellen, die als Niederfrequenz bezeichnet werden. In der technischen Umgangssprache wird das Wort „Hochfrequenz“ auch als Kurzform für Hochfrequenzspannung oder -leistung benutzt. In der Akustik wird dieser Frequenzbereich als Ultraschall bezeichnet. In der Medizin werden schon Frequenzen oberhalb 1 kHz als HF bezeichnet. Die Einordnung der Hochfrequenz und hochfrequenztechnischer Systeme hängt davon ab, ob besondere physikalische Eigenschaften gegenüber Niederfrequenz technisch maßgeblich sind. Gemäß der Leitungstheorie müssen auch schon 50-Hz-Hochspannungsleitungen ab etwa 1000 km Länge als Hochfrequenz-Systeme behandelt werden, denn sie sind bei dieser Länge bereits λ/4-lange Leitungen (siehe Ferranti-Effekt). In der Elektrotechnik wird der Frequenzbereich von 9 kHz (niedrigste zugewiesene Frequenz für die drahtlose Kommunikation) bis zum langwelligen Licht (THz-Bereich) als Hochfrequenz bezeichnet. Die EMV-Normung beginnt bei 9 kHz. Diese grobe Einteilung der Frequenzbereiche ist nicht zu verwechseln mit derjenigen, die u. a. die Langwelle als LF, die Mittelwelle als MF, die Kurzwelle als HF und die Ultrakurzwelle als VHF bezeichnet. All diese Bereiche sind Hochfrequenz (HF) im hier behandelten Sinne. Die feinere Einteilung mit englischen Abkürzungen wird auch in Deutschland in der (Amateur-)Funktechnik verwendet. Alle Anlagen zur drahtlosen elektromagnetischen Nachrichtenübermittlung arbeiten im Hochfrequenzbereich, abgesehen von einigen Ausnahmen wie Sanguine und ZEVS. Hochfrequenzspannung oder -leistung bis zum MHz-Bereich wird mit Koaxialkabeln, oberhalb etwa 1 GHz, je nach Anwendungsfall, zunehmend mit Hohlleitern übertragen.all, zunehmend mit Hohlleitern übertragen. , Hoogfrequent (HF) is de term die gebruikt Hoogfrequent (HF) is de term die gebruikt wordt (in de elektronica) voor stromen en spanningen die in een hoog tempo - met een hoge frequentie - wisselen van niveau of van positief naar negatief wisselen. De term 'hoogfrequent' wordt ook gebruikt bij geluidsgolven en heeft dan betrekking op ultrageluid.en en heeft dan betrekking op ultrageluid. , Radiofrekvens (RF) är den frekvens (svängnRadiofrekvens (RF) är den frekvens (svängningshastighet) som motsvarar radiovågornas, området från cirka 3 kHz till 300 GHz. Växelström i detta frekvensband kan bära radiosignaler. RF avser vanligtvis elektriska snarare än mekaniska svängningar, även om mekaniska RF-system existerar, till exempel mekaniska filter och RF-MEMS.till exempel mekaniska filter och RF-MEMS. , 무선주파수는 파장 0.1mm 이상의 범위, 즉 진동수 3 THz이하의 전자기파이다. RF(Radio Frequency)로 약칭한다. 무선주파수에 해당하는 전자기파는 방송에 사용되는 전파와 각종 무선 통신의 신호를 송수신하는 교류 전류 진동수로 활용되고 있다. , Радіочастота (RF) — будь-яка частота електРадіочастота (RF) — будь-яка частота електромагнітної хвилі, що знаходиться в межах приблизно від 3 кГц до 300 ГГц, і включає ті частоти, що використовуються для зв’язку чи сигналів радару. Під радіо частотою зазвичай мають на увазі електричне, а не механічне коливання. Однак, механічні РЧ системи існують (дивись і ). механічні РЧ системи існують (дивись і ).
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rdfs:comment Радіочастота (RF) — будь-яка частота електРадіочастота (RF) — будь-яка частота електромагнітної хвилі, що знаходиться в межах приблизно від 3 кГц до 300 ГГц, і включає ті частоти, що використовуються для зв’язку чи сигналів радару. Під радіо частотою зазвичай мають на увазі електричне, а не механічне коливання. Однак, механічні РЧ системи існують (дивись і ). механічні РЧ системи існують (дивись і ). , Częstotliwość radiowa, RF (od ang. radio frequency) – częstotliwość drgań elektromagnetycznych stosowanych w szeroko rozumianej radiotechnice. W zakres częstotliwości radiowych wchodzą drgania o zakresie od 3 kHz do 300 GHz. , Radiofrequência (RF) é a faixa de frequêncRadiofrequência (RF) é a faixa de frequência que abrange aproximadamente de 3 kHz a 300 GHz e que corresponde à frequência das ondas de rádio. RF geralmente se refere a oscilações eletromagnéticas ao invés de mecânicas nessa faixa de frequência, embora existam sistemas mecânicos em RF., embora existam sistemas mecânicos em RF. , 무선주파수는 파장 0.1mm 이상의 범위, 즉 진동수 3 THz이하의 전자기파이다. RF(Radio Frequency)로 약칭한다. 무선주파수에 해당하는 전자기파는 방송에 사용되는 전파와 각종 무선 통신의 신호를 송수신하는 교류 전류 진동수로 활용되고 있다. , Hoogfrequent (HF) is de term die gebruikt Hoogfrequent (HF) is de term die gebruikt wordt (in de elektronica) voor stromen en spanningen die in een hoog tempo - met een hoge frequentie - wisselen van niveau of van positief naar negatief wisselen. De term 'hoogfrequent' wordt ook gebruikt bij geluidsgolven en heeft dan betrekking op ultrageluid.en en heeft dan betrekking op ultrageluid. , Hochfrequenz (HF, englisch RF für radio frHochfrequenz (HF, englisch RF für radio frequency) ist in der Elektrotechnik die Bezeichnung für Frequenzen über denen von hörbaren Schallwellen, die als Niederfrequenz bezeichnet werden. In der technischen Umgangssprache wird das Wort „Hochfrequenz“ auch als Kurzform für Hochfrequenzspannung oder -leistung benutzt. In der Akustik wird dieser Frequenzbereich als Ultraschall bezeichnet. In der Medizin werden schon Frequenzen oberhalb 1 kHz als HF bezeichnet.equenzen oberhalb 1 kHz als HF bezeichnet. , S'anomena radiofreqüència o ones de ràdio S'anomena radiofreqüència o ones de ràdio (RF) la part de l'espectre electromagnètic en què les ones electromagnètiques es poden generar mitjançant un corrent altern aplicat a una antena i tradicionalment s'han utilitzat per a la comunicació. El terme radiofreqüència (abreujat RF), també denominat espectre de radiofreqüència, s'aplica a la porció menys energètica de l'espectre electromagnètic, situada entre 3 hertz (Hz) i 300 gigahertz (GHz). entre 3 hertz (Hz) i 300 gigahertz (GHz). , El término radiofrecuencia (RF) (también, El término radiofrecuencia (RF) (también, espectro de radiofrecuencia) se aplica a la porción menos energética del espectro electromagnético, situada entre los 3 hercios (Hz) y 300 gigahercios (GHz).​ El hercio es la unidad de medida de la frecuencia de las ondas, y corresponde a un ciclo por segundo.​ Las ondas electromagnéticas de esta región del espectro, se pueden transmitir aplicando la corriente alterna originada en un generador a una antena.na originada en un generador a una antena. , Radiofrekvens (RF) är den frekvens (svängnRadiofrekvens (RF) är den frekvens (svängningshastighet) som motsvarar radiovågornas, området från cirka 3 kHz till 300 GHz. Växelström i detta frekvensband kan bära radiosignaler. RF avser vanligtvis elektriska snarare än mekaniska svängningar, även om mekaniska RF-system existerar, till exempel mekaniska filter och RF-MEMS.till exempel mekaniska filter och RF-MEMS. , Ραδιοσυχνότητα είναι μια ταλάντωση που μετΡαδιοσυχνότητα είναι μια ταλάντωση που μεταδίδεται με την ταχύτητα του φωτός, ένα ηλεκτρομαγνητικό κύμα στην περιοχή των χαμηλότερων συχνοτήτων ή των μεγαλύτερων μηκών κύματος του ηλεκτρομαγνητικού φάσματος (100000-10m). Σε αυτή την περιοχή συχνοτήτων έγιναν τα πρώτα πειράματα εκπομπής και λήψης ηλεκτρομαγνητικών κυμάτων και αυτή η περιοχή χρησιμοποιήθηκε για τις ραδιοφωνικές εκπομπές γεγονός στο οποίο οφείλεται η ονομασία. Σήμερα ο όρος ραδιοσυχνότητα χρησιμοποιείται για όλη τη περιοχή του ηλεκτρομαγνητικού φάσματος από την αρχή του μέχρι την περιοχή των υπερύθρων (100000-0,001m).την περιοχή των υπερύθρων (100000-0,001m). , 高周波(こうしゅうは)とは、電波、音波など、波形を構成するスペクトラムのうち比較的周波数の高いものを指す。音波の場合は、超音波と呼ばれることが多い。 「高周波」あるいは「低周波」は周波数に関する事項ではあるが、慣習上、「周波」と言い換えている。 高周波という言葉だけでは周波数の定義は曖昧であり、人間が感知できる高音や超音波から無線周波数まで示す。 , Radio frequency (RF) is the oscillation raRadio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around 20 kHz to around 300 GHz. This is roughly between the upper limit of audio frequencies and the lower limit of infrared frequencies; these are the frequencies at which energy from an oscillating current can radiate off a conductor into space as radio waves. Different sources specify different upper and lower bounds for the frequency range. and lower bounds for the frequency range. , 射頻(英語:Radio frequency,縮寫為RF)又稱無線電頻率、無線射頻、高射頻(英語:Radio frequency,縮寫為RF)又稱無線電頻率、無線射頻、高周波,為在 3kHz至 300GHz這個範圍內的振盪頻率,這個頻率相當於無線電波的頻率,以及攜帶著無線電信號的交流電的頻率 。RF通常被用來指電子振盪,而不被用在機械振盪上,然而機械射頻系統仍然是存在的(如機械濾波器與)。 雖然射頻在定義上是用來指一種頻率,但在日常使用中,常被用來當成無線電的同義詞,以利描述無線通訊系統,如射頻識別。 在國際電信聯盟定義的無線電頻率劃分當中: * 甚低頻(VLF):3~30千赫(kHz) * 低頻(LF):30~300千赫(kHz) * 中頻(MF):300~3000千赫(kHz) * 高頻(HF):3~30兆赫(MHz) * 甚高頻(VHF):30~300兆赫(MHz) * 特高頻(UHF):300~3000兆赫(MHz) * 超高頻(SHF):3~30吉赫(GHz) * 極高頻(EHF):30~300吉赫(GHz)SHF):3~30吉赫(GHz) * 極高頻(EHF):30~300吉赫(GHz) , Frekuensi radio (bahasa Inggris: Radio freFrekuensi radio (bahasa Inggris: Radio frequency; RF) adalah tingkat osilasi dari arus atau tegangan listrik bolak-balik; atau dari medan magnet, listrik, atau elektromagnetik; atau dari sistem mekanis dalam rentang frekuensi dari kira-kira 20 kHz hingga kira-kira 300 . Frekuensi radio mengacu kepada spektrum elektromagnetik di mana gelombang elektromagnetik dapat dihasilkan oleh pemberian arus bolak-balik ke sebuah antena.mberian arus bolak-balik ke sebuah antena. , Le terme radio-fréquence (souvent abrégé eLe terme radio-fréquence (souvent abrégé en RF) désigne une fréquence d'onde électromagnétique située entre 3 kHz et 300 GHz (entre 3 × 103 et 3 × 1011 Hz), ce qui inclut les fréquences utilisées par différents moyens de radiocommunication, notamment la téléphonie mobile, le Wi-Fi ou la radiodiffusion, ainsi que des signaux destinés à d'autres usages comme les radars ou les fours à micro-ondes. Les ondes utilisant de telles fréquences sont les ondes radio.de telles fréquences sont les ondes radio. , Una radiofrequenza, nota anche con la siglUna radiofrequenza, nota anche con la sigla RF, indica generalmente un segnale elettrico o un'onda elettromagnetica ad alta frequenza che si propaga nello spazio o in un cavo coassiale. Viene spesso utilizzato per specificare circuiti o sistemi elettronici che elaborano e gestiscono segnali elettromagnetici ad alta frequenza (es. "amplificatore a RF", "stadio RF"). Nel caso di segnali via etere, con radiofrequenza si intendono onde elettromagnetiche di frequenza compresa tra qualche Hz e 300 GHz. Le lunghezze d'onda variano da 100000 km (da 3 Hz) a 1 mm (a 300 GHz).da 100000 km (da 3 Hz) a 1 mm (a 300 GHz). , Altfrekvenco, aŭ radiofrekvenco, estas eleAltfrekvenco, aŭ radiofrekvenco, estas elektromagnetondaj frekvencoj, kiuj troviĝas inter 3 KHz ĝis 300 GHz, inkludas tiujn frekvencojn uzitaj en radiofonia komunikado aŭ radaroj. Ili estas proksimume inter la supra limo de aŭdaj frekvencoj kaj la pli malalta limo de infraruĝaj frekvencoj.pli malalta limo de infraruĝaj frekvencoj. , Vysokofrekvenční, VF (anglicky Radio FrequVysokofrekvenční, VF (anglicky Radio Frequency, RF) je v elektronice a radiotechnice termín používaný nejčastěji pro kmitočty nad oblastí slyšitelných zvukových vln, které se nazývají nízkofrekvenční (NF). V akustice se toto frekvenční pásmo nazývá ultrazvuk. V různých kontextech se používají i jiné definice pro termín vysokofrekvenční: Díky velkému dosahu se vysokofrekvenční technologie používají pro telekomunikace – pro mobilní telefony, vysílání rozhlasu a televize, radiolokaci a pro komunikaci s umělými družicemi.kaci a pro komunikaci s umělými družicemi.
rdfs:label Радіочастота , Częstotliwość radiowa , 무선주파수 , Radiofrequência , Vysokofrekvenční , Radiofreqüència , Radiofrecuencia , Radiofrekvens , Frekuensi radio , Radiofrequenza , Hochfrequenz , Ραδιοσυχνότητα , Radio-fréquence , 高周波 , 射頻 , Radio frequency , Altfrekvenco , Hoogfrequent , تردد الراديو
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