Radio frequency (RF) refers to 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 3 kHz to around 300 GHz. This range corresponds to the frequencies of radio waves, and these are the frequencies commonly used for radio communication. RF is used in various applications, including radio and television broadcasting, mobile phones, Wi-Fi, Bluetooth, radar, and medical imaging.
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