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- RF_front_end abstract "In a radio receiver circuit, the RF front end is a generic term for all the circuitry between the antenna up to and including the mixer stage. It consists of all the components in the receiver that process the signal at the original incoming radio frequency (RF), before it is converted to a lower intermediate frequency (IF). In microwave and satellite receivers it is often called the low-noise block (LNB) or low-noise downconverter (LND) and is often located at the antenna, so that the signal from the antenna can be transferred to the rest of the receiver at the more easily handled intermediate frequency. For most superheterodyne architectures, the RF front end consists of: An impedance matching circuit to match the input impedance of the receiver with the antenna, so the maximum power is transferred from the antenna; A 'gentle' band-pass filter (BPF) to reduce strong out-of-band signals and image frequency response; An RF amplifier, often called the low-noise amplifier (LNA). Its primary responsibility is to increase the sensitivity of the receiver by amplifying weak signals without contaminating them with noise, so that they can stay above the noise level in succeeding stages. It must have a very low noise figure (NF). The RF amplifier may not be needed and is often omitted (or switched off) for frequencies below 30 MHz, where the signal-to-noise ratio is defined by atmospheric and man-made noise. A local oscillator (LO) which generates a radio frequency signal at an offset from the incoming signal, which is mixed with the incoming signal. The mixer, which mixes the incoming signal with the signal from the local oscillator to convert the signal to the intermediate frequency (IF).In many modern integrated receivers, particularly those in wireless devices such as cell phones and Wifi receivers, the intermediate frequency is digitized; sampled and converted to a binary digital form, and the rest of the processing - IF filtering and demodulation - is done by digital filters (digital signal processing, DSP), as these are smaller, use less power and can have more selectivity. In this type of receiver the RF front end is defined as everything from the antenna to the analog to digital converter (ADC) which digitizes the signal. The general trend is to do as much of the signal processing in digital form as possible, and some receivers digitize the RF signal directly, without down-conversion to an IF, so here the front end is merely an RF filter.".
- RF_front_end wikiPageID "2785376".
- RF_front_end wikiPageLength "3788".
- RF_front_end wikiPageOutDegree "25".
- RF_front_end wikiPageRevisionID "638065575".
- RF_front_end wikiPageWikiLink Amplifier.
- RF_front_end wikiPageWikiLink Analog-to-digital_converter.
- RF_front_end wikiPageWikiLink Analog_to_digital_converter.
- RF_front_end wikiPageWikiLink Antenna_(radio).
- RF_front_end wikiPageWikiLink Band-pass_filter.
- RF_front_end wikiPageWikiLink Binary_number.
- RF_front_end wikiPageWikiLink Category:Radio_electronics.
- RF_front_end wikiPageWikiLink Cell_phone.
- RF_front_end wikiPageWikiLink Digital_filter.
- RF_front_end wikiPageWikiLink Digital_signal.
- RF_front_end wikiPageWikiLink Digital_signal_processing.
- RF_front_end wikiPageWikiLink Electrical_circuit.
- RF_front_end wikiPageWikiLink Electrical_network.
- RF_front_end wikiPageWikiLink Frequency_mixer.
- RF_front_end wikiPageWikiLink Image_frequency.
- RF_front_end wikiPageWikiLink Impedance_matching.
- RF_front_end wikiPageWikiLink Intermediate_frequency.
- RF_front_end wikiPageWikiLink Local_oscillator.
- RF_front_end wikiPageWikiLink Low-noise_amplifier.
- RF_front_end wikiPageWikiLink Low-noise_block_converter.
- RF_front_end wikiPageWikiLink Low-noise_block_downconverter.
- RF_front_end wikiPageWikiLink Microwave.
- RF_front_end wikiPageWikiLink Mobile_phone.
- RF_front_end wikiPageWikiLink Noise_figure.
- RF_front_end wikiPageWikiLink Radio_frequency.
- RF_front_end wikiPageWikiLink Radio_receiver.
- RF_front_end wikiPageWikiLink Receiver_(radio).
- RF_front_end wikiPageWikiLink Superheterodyne_receiver.
- RF_front_end wikiPageWikiLinkText "RF front end".
- RF_front_end wikiPageWikiLinkText "front end".
- RF_front_end wikiPageWikiLinkText "front ends".
- RF_front_end wikiPageWikiLinkText "front-end".
- RF_front_end wikiPageWikiLinkText "frontend".
- RF_front_end wikiPageWikiLinkText "radio front ends".
- RF_front_end wikiPageWikiLinkText "radiofrequency receiver front-end".
- RF_front_end hasPhotoCollection RF_front_end.
- RF_front_end wikiPageUsesTemplate Template:Radio-comm-stub.
- RF_front_end wikiPageUsesTemplate Template:Reflist.
- RF_front_end subject Category:Radio_electronics.
- RF_front_end hypernym Term.
- RF_front_end type Article.
- RF_front_end type Article.
- RF_front_end type Circuit.
- RF_front_end comment "In a radio receiver circuit, the RF front end is a generic term for all the circuitry between the antenna up to and including the mixer stage. It consists of all the components in the receiver that process the signal at the original incoming radio frequency (RF), before it is converted to a lower intermediate frequency (IF).".
- RF_front_end label "RF front end".
- RF_front_end sameAs m.082m1h.
- RF_front_end sameAs Q7276615.
- RF_front_end sameAs Q7276615.
- RF_front_end wasDerivedFrom RF_front_end?oldid=638065575.
- RF_front_end isPrimaryTopicOf RF_front_end.