what is rf(radio frequency)
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- 2. RF itself has become synonymous with wireless and high-frequency signals, describing anything from AM radio between 535 kHz and 1605 kHz to computer local area networks (LANs) at 2.4 GHz. However, RF has traditionally defined frequencies from a few kHz to roughly 1 GHz.
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radio wave radio wave A very low frequency electromagnetic wave (from roughly 30 kilohertz to 100 gigahertz). Radio waves are used for the transmission of radio and television signals; the microwaves used in radar and microwave ovens are also radio waves. Many celestial objects, such as pulsars, emit radio waves. See more at electromagnetic spectrum.
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Frequently Asked Questions Most countries have assigned the 125 kHz or 134 kHz area of the radio spectrum for low-frequncy systems, and 13.56 MHz is used around the world for high-frequency systems. But UHF RFID systems have only been around since the mid-1990s and countries have not agreed on a single area of the UHF spectrum for RFID.
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Encyclopedia (R adio F requency remote control) A handheld, wireless device used to operate audio, video and other electronic equipment using radio frequency (RF) transmission. Unlike the more common infrared (IR) remotes, RF remotes do not require line of sight and do not have to be aimed at the equipment.
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- See also audio frequency (AF). Radio frequency (abbreviated RF, rf, orr.f.) is a term that refers to alternating current (AC) havingcharacteristics such that, if the current is input to an antenna, an electromagnetic (EM) field is generated suitable for wireless broadcastingand/or communications.
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- radio frequency or rf is the mode of communication that is used by most radio devices from deep space communication networks to cell phonescb radios use rf transceivers some tv remote controls use rfcordless phones use rf a standard radio is the most obvious receiver of radio signals rf is used to send signals to remote control toys wireless routers use rf technologyadio frequency or rf is the mode of communication that is used by most radio devices from deep space communication networks to cell phones
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- radiofrequency rf energy is another name for radio waves it is one form of electromagnetic energy which consists of waves of electric and magnetic energy moving together radiating through spacethe area where these waves are found is called an electromagnetic fieldadiofrequency rf energy is another name for radio waves it is one form of electromagnetic energy which consists of waves of electric and magnetic energy moving together radiating through space
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What is RF Testing? RF Testing Definition/Description: RF is short for radio frequency. RF is any frequency within the electromagnetic spectrum associated with radio wave propagation. When an RF current is supplied to an antenna, an electromagnetic field is created that then is able to propagate through space. Many wireless technologies are based on RF field propagation.
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Radio waves & microwaves Radio waves are the lowest-energy, lowest-frequency and longest-wavelength electromagnetic waves. They are produced when an alternating current flows in an aerial and they spread out and travel through the atmosphere. They are not strongly absorbed by the atmosphere.
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Radiofrequency Radiation (RF) Radiofrequency Radiation (RF) Radiofrequency (or RF) Radiation refers to electromagnetic fields with frequencies between 300 kHz and 300 MHz, while Microwave (or MW) Radiation covers fields from 300 MHz to 300 GHz. Since they have similar characteristics, RF and MW radiation are usually treated together.
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- Radiofrequency (RF) energy is another name for radio waves. It is one form of electromagnetic energy which consists of waves of electric and magnetic energy moving together (radiating) through space.The area where these waves are found is called an electromagnetic field.F energy includes waves with frequencies ranging from about 3000 waves per second (3 kHz) to 300 billion waves per second (300 GHz). Microwaves are a subset of radio waves that have frequencies ranging from around 300 million waves per second (300 MHz) to three billion waves per second (3 GHz).
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What is RF Testing? Radio waves and microwaves emitted by transmitting antennas are one form of electromagnetic energy. Often the term electromagnetic field or radiofrequency (RF) field may be used to indicate the presence of electromagnetic or RF energy.
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Ultrasound Cavitation & Radio-frequency Lipolysis â In laypersons terms This technology is even simpler to explain. RF is a kind of electric current that travels back and forth in different directions. It can be applied in such a way that it travels through your entire body from one side and out the other or between a 10mm gap using a small hand piece, just along the surface of your skin.
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Radio You might think radio is a gadget you listen to, but it also means something else. Radio means sending energy with waves. In other words, it's a method of transmitting electrical energy from one place to another without using any kind of direct, wired connection.
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Are private prisons better or worse than public prisons? Even where there are two prisons in the jurisdiction housing inmates of the same sex and security classification, they generally differ in size, age, level of crowding, inmate age mix, inmate health mix, and facility design.rivate prisons should get the same types of inmates as public prisons—neither better nor worse—and they should be restricted in whom they can transfer out. Having spent so long bemoaning the paucity of good comparative effectiveness studies, I should note that there’s more to life than comparative effectiveness.
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Radio spectrum Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light.Radio waves have frequencies from 300 GHz to as low as 3 kHz, and corresponding wavelengths ranging from 1 millimeter (0.039 in) to 100 kilometers (62 mi).Like all other electromagnetic waves, they travel at the speed of light. Naturally occurring radio waves are made by lightning, or by astronomical objects.adio waves have frequencies from 300 GHz to as low as 3 kHz, and corresponding wavelengths ranging from 1 millimeter (0.039 in) to 100 kilometers (62 mi). Like all other electromagnetic waves, they travel at the speed of light.
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- Medical Definition of radio–frequency. : of, relating to, using, or induced by radio frequencies a new…procedure that uses radio–frequency heat to collapse veins—Tara Parker-Pope.
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radio frequency Definition of radio frequency. : any of the electromagnetic wave frequencies that lie in the range extending from below 3 kilohertz to about 300 gigahertz and that include the frequencies used for communications signals (as for radio and television broadcasting and cell-phone and satellite transmissions) or radar signals.
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What is RF Testing? RF waves can be characterized by a wavelength and a frequency. The wavelength is the distance covered by one complete cycle of the electromagnetic wave, while the frequency is the number of electromagnetic waves passing a given point in one second. The frequency of an RF signal is usually expressed in terms of a unit called the hertz (Hz). One Hz equals one cycle per second. One megahertz (MHz) equals one million cycles per second. Different forms of electromagnetic energy are categorized by their wavelengths and frequencies.
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- The RF cavity is shaped to resonate at 500 MHz, which is the frequency of the RF radiation as well as the frequency at which the electron bunches pass. The beam pipe attaches to the cavity on either side.icrowaves are radio waves with a wavelength between about one meter and one millimeter, which are the wavelengths used for radio and television broadcasts as well as radar and microwave ovens.
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High frequency For high speed algorithmic trading, see high-frequency trading. HF's position in the electromagnetic spectrum. High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 MHz.It is also known as the decameter band or decameter wave as its wavelengths range from one to ten decameters (ten to one hundred metres).Frequencies immediately below HF are denoted medium frequency (MF), while the next band of higher frequencies is known as the very high frequency (VHF) band.requencies immediately below HF are denoted medium frequency (MF), while the next band of higher frequencies is known as the very high frequency (VHF) band.
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What is RF Testing? RF waves can be characterized by a wavelength and a frequency. The wavelength is the distance covered by one complete cycle of the electromagnetic wave, while the frequency is the number of electromagnetic waves passing a given point in one second.
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RF modulator ASTEC UM 1286 UHF modulator, top cover taken off. An RF modulator (or radio frequency modulator) is an electronic device whose input is a baseband signal which is used to modulate a radio frequency source.
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Spectrum The radio spectrum is the part of the electromagnetic spectrum corresponding to frequencies lower below 300 GHz, which corresponds to wavelengths longer than about 1 mm. The microwave spectrum corresponds to frequencies between 300 MHz (0.3 GHz) and 300 GHz and wavelengths between one meter and one millimeter.
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RF401A 900 MHz Spread-Spectrum Radio RF401A 900 MHz Spread-Spectrum Radio. Overview. The RF401A is a 900 MHz radio designed for license-free use in several countries, including the United States and Canada. It provides a hassle-free way to create long-distance wireless links between your computer, dataloggers, and measurement devices.
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RF module RF module. RF Module with ruler for size reference. An RF module (radio frequency module) is a (usually) small electronic device used to transmit and/or receive radio signals between two devices. In an embedded system it is often desirable to communicate with another device wirelessly.