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- Heterodyne_detection abstract "Heterodyne detection is a method of detecting radiation by non-linear mixing with radiation of a reference frequency. It is commonly used in telecommunications and astronomy for detecting and analysing signals.The radiation in question is most commonly either radio waves (see superheterodyne receiver) or light (see Optical heterodyne detection or interferometry). The reference radiation is known as the local oscillator. The signal and the local oscillator are superimposed at a mixer. The mixer, which is commonly a (photo-)diode, has a non-linear response to the amplitude, that is, at least part of the output is proportional to the square of the input.The received signal can be represented as and that of the local oscillator can be represented as For simplicity, assume that the output I of the detector is proportional to the square of the amplitude:The output has high frequency (, and ) and constant components. In heterodyne detection, the high frequency components and usually the constant components are filtered out, leaving the intermediate (beat) frequency at . The amplitude of this last component is proportional to the amplitude of the signal radiation. With appropriate signal analysis the phase of the signal can be recovered as well.If is equal to then the beat component is a recovered version of the original signal, with the amplitude equal to the product of and that is, the received signal is amplified by mixing with the local oscillator. This is the basis for a Direct conversion receiver.".
- Heterodyne_detection wikiPageID "1489314".
- Heterodyne_detection wikiPageRevisionID "592911921".
- Heterodyne_detection hasPhotoCollection Heterodyne_detection.
- Heterodyne_detection subject Category:Metrology.
- Heterodyne_detection subject Category:Waves.
- Heterodyne_detection type Abstraction100002137.
- Heterodyne_detection type Event100029378.
- Heterodyne_detection type Happening107283608.
- Heterodyne_detection type Movement107309781.
- Heterodyne_detection type PsychologicalFeature100023100.
- Heterodyne_detection type Wave107352190.
- Heterodyne_detection type Waves.
- Heterodyne_detection type YagoPermanentlyLocatedEntity.
- Heterodyne_detection comment "Heterodyne detection is a method of detecting radiation by non-linear mixing with radiation of a reference frequency. It is commonly used in telecommunications and astronomy for detecting and analysing signals.The radiation in question is most commonly either radio waves (see superheterodyne receiver) or light (see Optical heterodyne detection or interferometry). The reference radiation is known as the local oscillator. The signal and the local oscillator are superimposed at a mixer.".
- Heterodyne_detection label "Détection hétérodyne".
- Heterodyne_detection label "Heterodyne Detektion".
- Heterodyne_detection label "Heterodyne detection".
- Heterodyne_detection sameAs Heterodynní_detekce.
- Heterodyne_detection sameAs Heterodyne_Detektion.
- Heterodyne_detection sameAs Détection_hétérodyne.
- Heterodyne_detection sameAs m.055d55.
- Heterodyne_detection sameAs Q490183.
- Heterodyne_detection sameAs Q490183.
- Heterodyne_detection sameAs Heterodyne_detection.
- Heterodyne_detection wasDerivedFrom Heterodyne_detection?oldid=592911921.
- Heterodyne_detection isPrimaryTopicOf Heterodyne_detection.