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| {{mergeto| Heterodyne|discuss=Talk: Heterodyne#Merger proposal: Heterodyne detection|date=February 2017}} | {{mergeto| Heterodyne|discuss=Talk: Heterodyne#Merger proposal: Heterodyne detection|date=February 2017}} | ||
| '''Heterodyne detection''' is a method of extracting information encoded as ] of the ] and/or ] of an oscillating signal, by comparing that signal with a standard or reference oscillation that would have a fixed offset in frequency and phase from the signal if it carried null information. "Heterodyne" signifies more than one frequency, in contrast to the single frequency employed in ]. The heterodyne technique is commonly used in ], ], ] and ]. | '''Heterodyne detection''' is a method of extracting information encoded as ] of the ] and/or ] of an oscillating signal, by comparing that signal with a standard or reference oscillation that would have a fixed offset in frequency and phase from the signal if it carried null information. "Heterodyne" signifies more than one frequency, in contrast to the single frequency employed in ]. The heterodyne technique is commonly used in ], ],<ref name="Issakov2010">{{cite book |last1=Issakov|first1=Vadim |title=Microwave Circuits for 24 GHz Automotive Radar in Silicon-based Technologies | chapter=Chapter 2 — Radar Systems|year=2010| pages=5–18 |doi=10.1007/978-3-642-13598-9_2}}</ref> ]<ref name="Baylon-FuentesHernandez-Nava2011">{{cite journal|last1=Baylon-Fuentes|first1=A.|last2=Hernandez-Nava|first2=P.|last3=Zaldivar-Huerta|first3=I. E.|last4=Rodriguez-Asomoza|first4=J.|last5=Garcia-Juarez|first5=A.|last6=Aguayo-Rodriguez|first6=G.|title=Microwave signal generation based on optical heterodyne and its application in optical telecommunication system|year=2011|pages=334–338|doi=10.1109/CONIELECOMP.2011.5749336}}</ref> and ]. | ||
| The processed signals are most commonly produced by the reception of radiation in the form of either radio waves (see ]) or light (see ] or ]). The reference signal is known as the ]. The signal and the local oscillator are compared in the receiver using a type of technology suitable for the wavelength of the radiation. For ] signals, a ] may be used, while for |
The processed signals are most commonly produced by the reception of radiation in the form of either radio waves (see ]) or light (see ] or ]). The reference signal is known as the ]. The signal and the local oscillator are compared in the receiver using a type of technology suitable for the wavelength of the radiation. For ] signals, a ] may be used, while for ], a common mixer is a ], which has a response that is ] in ], and hence ] in ]. | ||
| ==See also== | ==See also== | ||
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| ==References== | |||
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| {{DEFAULTSORT:Heterodyne Detection}} | {{DEFAULTSORT:Heterodyne Detection}} | ||
Revision as of 02:59, 16 February 2017
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 | It has been suggested that this article be merged into Heterodyne. (Discuss) Proposed since February 2017. |
Heterodyne detection is a method of extracting information encoded as modulation of the phase and/or frequency of an oscillating signal, by comparing that signal with a standard or reference oscillation that would have a fixed offset in frequency and phase from the signal if it carried null information. "Heterodyne" signifies more than one frequency, in contrast to the single frequency employed in homodyne detection. The heterodyne technique is commonly used in doppler radar, continuous-wave radar, telecommunications and astronomy.
The processed signals are most commonly produced by the reception of radiation in the form of either radio waves (see superheterodyne receiver) or light (see Optical heterodyne detection or interferometry). The reference signal is known as the local oscillator. The signal and the local oscillator are compared in the receiver using a type of technology suitable for the wavelength of the radiation. For radio frequency signals, a frequency mixer may be used, while for optical heterodyne detection, a common mixer is a photodiode, which has a response that is linear in energy, and hence quadratic in amplitude.
See also
References
- Issakov, Vadim (2010). "Chapter 2 — Radar Systems". Microwave Circuits for 24 GHz Automotive Radar in Silicon-based Technologies. pp. 5–18. doi:10.1007/978-3-642-13598-9_2.
- Baylon-Fuentes, A.; Hernandez-Nava, P.; Zaldivar-Huerta, I. E.; Rodriguez-Asomoza, J.; Garcia-Juarez, A.; Aguayo-Rodriguez, G. (2011). "Microwave signal generation based on optical heterodyne and its application in optical telecommunication system": 334–338. doi:10.1109/CONIELECOMP.2011.5749336.
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