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IEVref: | 702-07-25 | ID: | |

Language: | en | Status: Standard | |

Term: | return loss | ||

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Definition: | the modulus of the reciprocal of the reflection factor, generally expressed in decibels
NOTE – When impedances can be defined, the return loss is given by the formula: $-\text{\hspace{0.17em}}20\text{\hspace{0.17em}}\text{lg}\text{\hspace{0.17em}}\left|r\right|=20\text{\hspace{0.17em}}\text{lg}\text{\hspace{0.17em}}\left|\frac{\underset{\_}{Z}-{\underset{\_}{Z}}^{\prime}}{\underset{\_}{Z}+{\underset{\_}{Z}}^{\prime}}\right|$
where ′ is the impedance after the discontinuity or the load impedance seen from the junction between the source and the load. Z | ||

Publication date: | 1992-03 | ||

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Internal notes: | 2017-06-02: Cleanup - Remove Attached Image 702-07-25.gif | ||

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where * Z* is the characteristic impedance of a transmission line ahead of a discontinuity, or the impedance of a source, and