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IEVref: | 702-07-24 | ID: | |

Language: | en | Status: backup | |

Term: | (complex) reflection factor | ||

Synonym1: | (complex) reflection coefficient [Preferred] | ||

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Symbol: | r | ||

Definition: | the complex ratio of a sinusoidal field quantity, such as a reflected current or reflected wave component, to the corresponding field quantity of the incident current or incident wave at a point near the surface separating two propagation media, near a port of an electrical network or near a discontinuity in a transmission line
NOTE 1 – When the field quantity is a component of a plane electromagnetic wave, the sign of the reflection factor is different for an electric field component and the corresponding magnetic field component. NOTE 2 – When the field quantity refers to a port of an electrical network, or to a discontinuity in a transmission line, a voltage reflection factor can be defined with a sign opposite to that of the current reflection factor. NOTE 3 – When impedances can be defined, the complex current reflection factor $\underset{\_}{r}=\frac{\underset{\_}{Z}-{\underset{\_}{Z}}^{\prime}}{\underset{\_}{Z}+{\underset{\_}{Z}}^{\prime}}$
where ′ is the impedance after the discontinuity or the load impedance seen from the junction between the source and the load.
ZNOTE 4 – The reflection factor depends in the case of waveguides on the electromagnetic mode considered. | ||

Publication date: | 1992-03 | ||

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$\underset{\_}{r}=\frac{\underset{\_}{Z}-{\underset{\_}{Z}}^{\prime}}{\underset{\_}{Z}+{\underset{\_}{Z}}^{\prime}}$

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

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