Fiber Optics pp 259-261 | Cite as

Decibel Units

  • Fedor Mitschke


The measurement units of “decibels” are in widespread use in electrical engineering; both physicists and engineers are expected to use them proficiently. They constitute a logarithmic measure useful for gain factors, attenuation factors, etc. The advantage of using a logarithmic measure is that in a transmission chain, there are many elements concatenated, and each has its own gain or attenuation. To obtain the total, addition of decibel values is much more convenient than multiplication of the individual factors.


Electrical Engineering Field Amplitude Attenuation Factor Gain Factor Power Gain 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  1. 1.Universität Rostock Institut für PhysikRostockGermany

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