IEVref: 103-10-18 ID: Language: en Status: Standard Term: propagation coefficient Synonym1: Synonym2: Synonym3: Symbol: $\underset{_}{\gamma }$ Definition: complex quantity $\underset{_}{\gamma }=\alpha +\text{j}\beta$ appearing in the complex representation of a wave ${A}_{0}\text{exp}\left(-\underset{_}{\gamma }\text{ }x+\text{j}\omega \text{ }t+\text{j}{\vartheta }_{0}\right)$, where its real part ${A}_{0}\text{exp}\left(-\alpha \text{ }x\right)\text{cos}\left(-\beta \text{ }x+\omega \text{ }t+{\vartheta }_{0}\right)$ represents, along a line parallel to the x-axis, a characteristic quantity of a guided sinusoidal wave or a plane sinusoidal wave, at angular frequency ω and initial phase ${\vartheta }_{0}$Note 1 to entry: The concept of propagation coefficient has a meaning only when ${A}_{0}$ and $\underset{_}{\gamma }$ are substantially independent of x. Note 2 to entry: The propagation coefficient has the dimension of reciprocal length and is usually a function of frequency. Publication date: 2009-12 Source: Replaces: Internal notes: 2017-02-20: Editorial revisions in accordance with the information provided in C00020 (IEV 103) - evaluation. JGO CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: