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Low-noise_amplifier abstract "Low-noise amplifier (LNA) is an electronic amplifier used to amplify very weak signals (for example, signals captured by an antenna). Essentially, an LNA amplifies signals that are barely recognizable without adding a lot of noise, as the name implies.An LNA is usually located close to the signal source in order to reduce losses in the feedline or minimize interference. This arrangement is frequently used in microwave systems such as GPS, because coaxial cable feedline has high loss at microwave frequencies. For example, 10 feet (3.0 m) of RG-174 coaxial cable has a loss of 3.2 dB (50 percent) at 1 GHz; the feedline would degrade the signal-to-noise ratio (SNR) by 3.2 dB (50 percent).An LNA is a key component at the front-end of a radio receiver circuit. Per Friis' formula, the overall noise figure (NF) of the receiver's front-end is dominated by the first few stages (or only the first stage).Using an LNA, the effect of noise from subsequent stages of the receive chain is reduced by the gain of the LNA, while the noise of the LNA itself is injected directly into the received signal. Thus, it is necessary for an LNA to boost the desired signal power while adding as little noise and distortion as possible. This enables retrieval of the signal in the later stages of the system. A good LNA has a low NF (e.g. 1 dB), enough gain (e.g. 20 dB) and should have large enough intermodulation and compression point (IP3 and P1dB). Further criteria are operating bandwidth, gain flatness, stability, input and output voltage standing wave ratio (VSWR).For low noise, the amplifier needs to have a high amplification in its first stage. Therefore, JFETs and HEMTs are often used. They are driven in a high-current regime, which is not energy-efficient, but reduces the relative amount of shot noise. Input and output matching circuits for narrow-band circuits enhance the gain (see Gain-bandwidth product).".
Low-noise_amplifier wikiPageExternalLink calculator-thd.htm.
Low-noise_amplifier wikiPageID "285370".
Low-noise_amplifier wikiPageLength "8474".
Low-noise_amplifier wikiPageOutDegree "43".
Low-noise_amplifier wikiPageRevisionID "683883223".
Low-noise_amplifier wikiPageWikiLink Amplifier.
Low-noise_amplifier wikiPageWikiLink Antenna_(electronics).
Low-noise_amplifier wikiPageWikiLink Antenna_(radio).
Low-noise_amplifier wikiPageWikiLink Category:Electronic_amplifiers.
Low-noise_amplifier wikiPageWikiLink Coaxial_cable.
Low-noise_amplifier wikiPageWikiLink Communications_satellite.
Low-noise_amplifier wikiPageWikiLink Electronic_amplifier.
Low-noise_amplifier wikiPageWikiLink Electronic_noise.
Low-noise_amplifier wikiPageWikiLink Feed_line.
Low-noise_amplifier wikiPageWikiLink Feedline.
Low-noise_amplifier wikiPageWikiLink Friis_formulas_for_noise.
Low-noise_amplifier wikiPageWikiLink GPS.
Low-noise_amplifier wikiPageWikiLink Gain-bandwidth_product.
Low-noise_amplifier wikiPageWikiLink Gain_(electronics).
Low-noise_amplifier wikiPageWikiLink Gain–bandwidth_product.
Low-noise_amplifier wikiPageWikiLink Geosynchronous_satellite.
Low-noise_amplifier wikiPageWikiLink Global_Positioning_System.
Low-noise_amplifier wikiPageWikiLink Heterodyne.
Low-noise_amplifier wikiPageWikiLink High-electron-mobility_transistor.
Low-noise_amplifier wikiPageWikiLink High_Electron_Mobility_Transistor.
Low-noise_amplifier wikiPageWikiLink ISM_band.
Low-noise_amplifier wikiPageWikiLink Impedance_matching.
Low-noise_amplifier wikiPageWikiLink Intermodulation.
Low-noise_amplifier wikiPageWikiLink JFET.
Low-noise_amplifier wikiPageWikiLink Johnson–Nyquist_noise.
Low-noise_amplifier wikiPageWikiLink Junction_Field-Effect_Transistor.
Low-noise_amplifier wikiPageWikiLink Low-noise_block_converter.
Low-noise_amplifier wikiPageWikiLink Low-noise_block_downconverter.
Low-noise_amplifier wikiPageWikiLink Microwave.
Low-noise_amplifier wikiPageWikiLink Noise_(electronics).
Low-noise_amplifier wikiPageWikiLink Noise_figure.
Low-noise_amplifier wikiPageWikiLink Nonlinear_system.
Low-noise_amplifier wikiPageWikiLink Operating_temperature.
Low-noise_amplifier wikiPageWikiLink Oscillation.
Low-noise_amplifier wikiPageWikiLink Oscillator.
Low-noise_amplifier wikiPageWikiLink RF_front_end.
Low-noise_amplifier wikiPageWikiLink Receiver_(radio).
Low-noise_amplifier wikiPageWikiLink Remote_keyless_system.
Low-noise_amplifier wikiPageWikiLink Rollets_Stability_factor.
Low-noise_amplifier wikiPageWikiLink Satellite_communications.
Low-noise_amplifier wikiPageWikiLink Satellite_television.
Low-noise_amplifier wikiPageWikiLink Scattering_parameters.
Low-noise_amplifier wikiPageWikiLink Shot_noise.
Low-noise_amplifier wikiPageWikiLink Signal-to-noise_ratio.
Low-noise_amplifier wikiPageWikiLink Standing_wave_ratio.
Low-noise_amplifier wikiPageWikiLink TIROS.
Low-noise_amplifier wikiPageWikiLink Television_Infrared_Observation_Satellite.
Low-noise_amplifier wikiPageWikiLink Transducer.
Low-noise_amplifier wikiPageWikiLink Wireless_LAN.
Low-noise_amplifier wikiPageWikiLinkText "LNA".
Low-noise_amplifier wikiPageWikiLinkText "Low-noise amplifier".
Low-noise_amplifier wikiPageWikiLinkText "RF amplifier".
Low-noise_amplifier wikiPageWikiLinkText "low-noise amplification".
Low-noise_amplifier wikiPageWikiLinkText "low-noise amplifier".
Low-noise_amplifier wikiPageWikiLinkText "pre-amplifiers".
Low-noise_amplifier hasPhotoCollection Low-noise_amplifier.
Low-noise_amplifier wikiPageUsesTemplate Template:Citation_needed.
Low-noise_amplifier wikiPageUsesTemplate Template:Convert.
Low-noise_amplifier wikiPageUsesTemplate Template:Multiple_issues.
Low-noise_amplifier wikiPageUsesTemplate Template:Reflist.
Low-noise_amplifier subject Category:Electronic_amplifiers.
Low-noise_amplifier hypernym Amplifier.
Low-noise_amplifier type Article.
Low-noise_amplifier type Company.
Low-noise_amplifier type Article.
Low-noise_amplifier type Circuit.
Low-noise_amplifier type Transistor.
Low-noise_amplifier comment "Low-noise amplifier (LNA) is an electronic amplifier used to amplify very weak signals (for example, signals captured by an antenna). Essentially, an LNA amplifies signals that are barely recognizable without adding a lot of noise, as the name implies.An LNA is usually located close to the signal source in order to reduce losses in the feedline or minimize interference.".
Low-noise_amplifier label "Low-noise amplifier".
Low-noise_amplifier sameAs Low_Noise_Amplifier.
Low-noise_amplifier sameAs تقویت‌کننده_با_نویز_پایین.
Low-noise_amplifier sameAs Amplificateur_faible_bruit.
Low-noise_amplifier sameAs מגבר_רעש_נמוך.
Low-noise_amplifier sameAs Amplificatore_a_basso_rumore.
Low-noise_amplifier sameAs 저잡음_증폭기.
Low-noise_amplifier sameAs m.01pyjk.
Low-noise_amplifier sameAs LNA.
Low-noise_amplifier sameAs Q1151304.
Low-noise_amplifier sameAs Q1151304.
Low-noise_amplifier sameAs 低噪音放大器.
Low-noise_amplifier wasDerivedFrom Low-noise_amplifier?oldid=683883223.
Low-noise_amplifier isPrimaryTopicOf Low-noise_amplifier.