what does rf power mean
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Radio frequency Although radio frequency is a rate of oscillation, the term radio frequency or its abbreviation RF are used as a synonym for radio – i.e., to describe the use of wireless communication, as opposed to communication via electric wires. The energy in an RF current can radiate off a conductor into space as electromagnetic waves (radio waves); this is the basis of radio technology. 2  RF current does not penetrate deeply into electrical conductors but tends to flow along their surfaces; this is known as the skin effect.
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- Applications [edit]. The basic applications of the RF power amplifier include driving to another high power source, driving a transmitting antenna and exciting microwave cavity resonators. Among these applications, driving transmitter antennas is most well known.t is usually optimized to have high efficiency, high output Power(P1dB) compression, good return loss on the input and output, good gain, and optimum heat dissipation. RF amplifiers formerly were all made used vacuum tubes (called valves in some English-speaking countries).
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Audio power Continuous power and RMS power. A voltage waveform and its corresponding power waveform (resistive load). RMS voltage in blue, peak power in red, average power in green. Continuous average sine wave power ratings are a staple of performance specifications for audio amplifiers and, sometimes, loudspeakers. As described above, the term average power refers to the average value of the instantaneous power waveform over time.
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Radio frequency For other uses, see RF (disambiguation) . Radio frequency (RF): any of the electromagnetic wave frequencies that lie in the range extending from around 7003300000000000000♠3 kHz to 7011300000000000000♠300 GHz, which include those frequencies used for communications or radar signals. The energy in an RF current can radiate off a conductor into space as electromagnetic waves (radio waves); this is the basis of radio technology. 2  RF current does not penetrate deeply into electrical conductors but tends to flow along their surfaces; this is known as the skin effect.
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- Utility frequency. The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the nominal frequency of the oscillations of alternating current (AC) in an electric power grid transmitted from a power station to the end-user.
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Radio frequency 1 The energy in an RF current can radiate off a conductor into space as electromagnetic waves (radio waves); this is the basis of radio technology.
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- Specific Absorption Rate. (SAR) The Specific Absorption Rate is defined as the RF power absorbed per unit of mass of an object, and is measured in watts per kilogram (W/kg). The SAR describes the potential for heating of the patient's tissue due to the application of the RF energy necessary to produce the MR signal.
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What is the meaning of RSSI? RSSI is a Radio-Frequency (RF) term and stands for Received Signal Strength Indicator. It is a measure of the power level that a RF device, such as WiFi or 3G client, is receiving from the radio infrastructure at a given location and time. For instance, the power level a laptop is detecting from a nearby AP.
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- Radio frequency interference, RFI, is any undesirable electrical energy with content within the frequency range dedicated to radio frequency transmission. Conducted RFI is most often found in the low frequency range of several kHz to 30MHz.
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What is the difference between watts and rms? These power ratings are important. Amplifiers are valued in part by their power output capacity. loudspeakers, are valued by their thermal and a mechanical aspect to maximum power handling. RMS W- the maximum amount of power an electronic component can possibly handle continuously without damage.
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Radiofrequency (RF) Radiation The quantity used to measure how much RF energy is actually absorbed in a body is called the specific absorption rate (SAR). It is usually expressed in units of watts per kilogram (W/kg) or milliwatts per gram (mW/g).
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- What can be treated with Radio Frequency(RF)? RF is a effective way to improve skin tightness and elasticity, reduce wrinkles and cellulite, boosting the overall condition on areas of the body such as the face, chin, upper arm, abdomen, thighs, bra line or buttocks.
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Volt-ampere reactive (Redirected from MVAr). In electric power transmission and distribution, volt-ampere reactive (var) is a unit by which reactive power is expressed in an AC electric power system. Reactive power exists in an AC circuit when the current and voltage are not in phase.he reactive power (measured in units of volt-amperes reactive or var) is given by: where is the phase angle between the current and voltage. Q refers to the maximum value of the instantaneous power absorbed by the reactive component of the load.
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What is RF Testing? The RF part of the electromagnetic spectrum is generally defined as that part of the spectrum where electromagnetic waves have frequencies in the range of about 3 kilohertz (3 kHz) to 300 gigahertz (300 GHz).he 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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Utility frequency The utility frequency, line frequency or mains frequency is the nominal frequency of the oscillations of alternating current in an electric power grid transmitted from a power station to the end-user. In large parts of the world this is 50 Hz, although in the Americas and parts of Asia it is typically 60 Hz. Current usage by country or region is given in the list of mains power around the world. During the development of commercial electric power systems in the late 19th and early 20th centuries
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RF & Microwave Power Meter Tutorial RF and microwave power measurement and RF and microwave power meters are important elements within the RF and microwave design arena. The output power level of many RF and microwave amplifiers is a critical parameter in the design.here are two main types of RF power meter that are used: 1  Through-line RF power meters: These RF power meters take a sample of the power flowing along a feed-line and use this to indicate the power level.
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RF - radio frequency RF - radio frequency. Related Terms. 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. Radio frequency is also abbreviated as rf or r.f..
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Talk:Celsius In physics, power (symbol: P) is the rate at which work is performed. In the SI system of measurement, power is measured in watts (symbol: W). This can be modeled as an energy flow, equivalent to the rate of change of the energy in a system, or the time rate of doing work.
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What is RF Testing? The RF part of the electromagnetic spectrum is generally defined as that part of the spectrum where electromagnetic waves have frequencies in the range of about 3 kilohertz (3 kHz) to 300 gigahertz (300 GHz).Probably the most important use for RF energy is in providing telecommunications services.or example, the unit volts per meter (V/m) is used to measure the strength of the electric field and the unit amperes per meter (A/m) is used to express the strength of the magnetic field. RF waves can be characterized by a wavelength and a frequency.
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- TestMy.net has a high resolution download test. Unlike other speed tests TestMy.net takes measurements during the test to show you the path of your download speed over the course of the test. It conducts tests within the test. The end result is unparalleled result detail.
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RF Amplifiers Radio frequency amplifiers are generally used to convert lower power and low frequency radio signals into a larger frequency at a higher power. Coaxial amplifiers for RF are typically used in RF, microwave and millimeter wave applications for the transmission power through an antenna or systems of antennas.
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- Reactive Power - A component of apparent power (volt-amps) which does not produce any real power (watts). It is measured in VARs volt-amps reactive. Reading - The expected output at a given input value.
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- 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 these frequencies make up part of the electromagnetic radiation spectrum ultra low frequency ulf 0 3 hzhen 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 these frequencies make up part of the electromagnetic radiation spectrum ultra low frequency ulf 0 3 hz
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RMS V.S. Peak Power RMS Power Ratings: The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. RMS power is derived from Root Mean Square which is a statistical measurement of the magnitude of a varying quantity and is applied to voltage or current.
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- VSWR stands for Voltage Standing Wave Ratio, and is also referred to as Standing Wave Ratio (SWR). VSWR is a function of the reflection coefficient, which describes the power reflected from the antenna.
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- In the older days of amateur radio, it would mean the INPUT power to the final amplifier, that is, what's taken from the grid no matter what was spat out, which was often only 50% of what went in if all was going well. So, the answer varies depending on what the terms mean and in what context.