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    Radio frequency - Wikipedia

    • Radio 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, and also encompasses the microwa… See more

    Electric current

    Electric currents that oscillate at radio frequencies (RF currents) have special properties not shared by
    • … See more

    Frequency bands

    The radio spectrum of frequencies is divided into bands with conventional names designated by the International Telecommunication Union (ITU):
    Frequency range Wavelength range ITU designatio… See more

    Applications

    Radio frequencies are used in communication devices such as transmitters, receivers, computers, televisions, and mobile phones, to name a few. Radio frequencies are also applied in carrier current systems … See more

    Measurement

    Test apparatus for radio frequencies can include standard instruments at the lower end of the range, but at higher frequencies, the test equipment becomes more specialized. See more

    Mechanical oscillations

    While RF usually refers to electrical oscillations, mechanical RF systems are not uncommon: see mechanical filter and RF MEMS. See more

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