Radio Frequency

Radio frequency (RF) is a rate of oscillation in the range of about 3 kHz to 300 GHz, which corresponds to the frequency of radio waves, and the alternating currents which carry radio signals. RF usually refers to electrical rather than mechanical oscillations, although mechanical RF systems do exist (see mechanical filter and RF MEMS).

Although radio frequency is a rate of oscillation, the term "radio frequency" or its acronym "RF" are also used as a synonym for radio – i.e. to describe the use of wireless communication, as opposed to communication via electric wires. Examples include:

  • Radio-frequency identification
  • ISO/IEC 14443-2 Radio frequency power and signal interface

Read more about Radio Frequency:  Special Properties of RF Current, Radio Communication, Frequencies, In Medicine

Other articles related to "radio, radio frequency, frequency":

Shale Oil Extraction - In Situ Technologies - Volumetric Heating
... the concept of oil shale volumetric heating using radio waves (radio frequency processing) during the late 1970s ... The concept presumes a radio frequency at which the skin depth is many tens of meters, thereby overcoming the thermal diffusion times needed for conductive heating ... Radio frequency processing in conjunction with critical fluids is being developed by Raytheon together with CF Technologies and tested by Schlumberger ...
Superconducting Radio Frequency
... Superconducting radio frequency (SRF) science and technology involves the application of electrical superconductors to radio frequency devices ...
... SELCAL operates on the high frequency (HF) or very high frequency (VHF) radio frequency bands used for aircraft communications ... HF radio often has extremely high levels of background noise and can be difficult or distracting to listen to for long periods of time ... As a result, it is common practice for crews to keep the radio volume low unless the radio is immediately needed ...
... HIRF is an acronym for High Intensity Radiated Fields and refers to radio frequency energy of a strength sufficient to adversely affect either a living organism or the performance of a device ... Commission (FCC) set limits for the amounts of Radio Frequency Energy exposure permitted in a standard work-day ... Radio-Frequency Energy is non-ionizing electromagnetic radiation, its effects on tissue are through heating ...
Radio Frequency - In Medicine
... Radio frequency (RF) energy has been used in medical treatments for over 75 years, generally for minimally invasive surgeries, using radiofrequency ablation and cryoablation, including the treatment of sleep ... Magnetic resonance imaging (MRI) uses radio frequency waves to generate images of the human body ...

Famous quotes containing the words frequency and/or radio:

    The frequency of personal questions grows in direct proportion to your increasing girth. . . . No one would ask a man such a personally invasive question as “Is your wife having natural childbirth or is she planning to be knocked out?” But someone might ask that of you. No matter how much you wish for privacy, your pregnancy is a public event to which everyone feels invited.
    Jean Marzollo (20th century)

    ... the ... radio station played a Chopin polonaise. On all the following days news bulletins were prefaced by Chopin—preludes, etudes, waltzes, mazurkas. The war became for me a victory, known in advance, Chopin over Hitler.
    Margaret Anderson (1886–1973)