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- Q4771247 subject Q10210014.
- Q4771247 subject Q8411406.
- Q4771247 abstract "In electronics, an antenna amplifier (also: aerial eamplifier (booster), Am antennefier) is a device that amplifies an antenna signal, usually into an output with the same impedance as the input impedance. Typically 75 Ohm for coaxial cable and 300 Ohm for twin lead cable.An antenna amplifier boosts a radio signal considerably for devices that receive radio waves. Many devices have an RF amplifier stage in their circuitry, that amplifies the antenna signal, these include, but are not limited to; Radios, Televisions, Mobile Phones and Wi-Fi and Bluetooth devices. Amplifiers amplify everything, both the desired signal present at the antenna, and the noise. Typical signal noises include: ambient background noise (electric brush noise from electric motors, high voltage sources from, for example a gasoline engine ignition, or large dispersed currents in the vicinity of the desired reception electric fence). To add, consideration must be taken for the noise generated by the amplifier itself and all other electrical noise which may be generated by the device that is to receive a signal, for example a lot of consideration has to go into mobile phone circuitry design to eliminate as much noise from its own circuitry in order to not disturb the desired transmission signals from its own antenna(ae).An indoor antenna may include an amplifier circuit, whereby powered reception of the signal can help with capturing as much of an FM, UHF/VHF signal, for amplifying a Radio or Television signal. Its draw backs are that any noise is usually amplified as well, and a common result from this is amplification of ghost images (for analog signals), and any other perturberances that may be existing locally or even extra terrestrially like the Cosmic microwave background radiation for devices that work in that frequency range.The key to a "good" level of input at your receiver with the minimum amount noise includes many design considerations in an electrical amplifier. In theory it is best if you amplify a "clean" signal to a higher level than a "noisy" signal to a higher level, and many circuits include filters to remove all but the desired reception signal. Some consideration has to be taken for cable loss and the signal frequencies desired for example higher frequency (VHF or higher: 2.4 GHz WiFi/third generation Mobile phone.) the more the loss that the cable has, and the more susceptible the transmission cable is to noise degradation. Starting with a signal from the antenna which is then directed through a coaxial cable, the amount of loss depends upon a number of factors, cable type and cable length are the two most important. Cable is rated in db loss per length of cable at a specified frequency, for example RG-6 cable is the cable most used for Television reception. Belden 1829AC Coax - Series 6 has a loss of 4db/100 feet at 500 MHz (TV Channel 18)- 495.250Channel 32 which is 580 MHz, Channel 52 is 700 MHz a 5 db loss At TV channel 2, the cable would have a loss of 1.4db. So at channel 18 you would lose more than 1/2 the power in 100' of cable between the antenna and the TV.See Also:BalunCosmic microwave background radiation".
- Q4771247 thumbnail RF_preamplifier_for_TV_and_FM_VUBCB40N_inner_view.jpg?width=300.
- Q4771247 wikiPageWikiLink Q10210014.
- Q4771247 wikiPageWikiLink Q11650.
- Q4771247 wikiPageWikiLink Q1292216.
- Q4771247 wikiPageWikiLink Q131214.
- Q4771247 wikiPageWikiLink Q1371624.
- Q4771247 wikiPageWikiLink Q152466.
- Q4771247 wikiPageWikiLink Q15605.
- Q4771247 wikiPageWikiLink Q159391.
- Q4771247 wikiPageWikiLink Q174984.
- Q4771247 wikiPageWikiLink Q179043.
- Q4771247 wikiPageWikiLink Q183389.
- Q4771247 wikiPageWikiLink Q2852692.
- Q4771247 wikiPageWikiLink Q4262.
- Q4771247 wikiPageWikiLink Q805838.
- Q4771247 wikiPageWikiLink Q815327.
- Q4771247 wikiPageWikiLink Q8411406.
- Q4771247 type Thing.
- Q4771247 comment "In electronics, an antenna amplifier (also: aerial eamplifier (booster), Am antennefier) is a device that amplifies an antenna signal, usually into an output with the same impedance as the input impedance. Typically 75 Ohm for coaxial cable and 300 Ohm for twin lead cable.An antenna amplifier boosts a radio signal considerably for devices that receive radio waves.".
- Q4771247 label "Antenna amplifier".
- Q4771247 depiction RF_preamplifier_for_TV_and_FM_VUBCB40N_inner_view.jpg.