This article is about reflections of waves. For the use of the term with capillary membrames, see Starling equation § Reflection coefficient. For intensity ratios, see Reflectance.
In physics and electrical engineering the reflection coefficient is a parameter that describes how much of a wave is reflected by an impedance discontinuity in the transmission medium. It is equal to the ratio of the amplitude of the reflected wave to the incident wave, with each expressed as phasors. For example, it is used in optics to calculate the amount of light that is reflected from a surface with a different index of refraction, such as a glass surface, or in an electrical transmission line to calculate how much of the electromagnetic wave is reflected by an impedance discontinuity. The reflection coefficient is closely related to the transmission coefficient. The reflectance of a system is also sometimes called a reflection coefficient.
A wave is partially transmitted and partially reflected when the medium through which it travels suddenly changes. The reflection coefficient determines the ratio of the reflected wave amplitude to the incident wave amplitude.
Different specialties have different applications for the term.
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In physics and electrical engineering the reflectioncoefficient is a parameter that describes how much of a wave is reflected by an impedance discontinuity...
The Fresnel equations (or Fresnel coefficients) describe the reflection and transmission of light (or electromagnetic radiation in general) when incident...
resulting formula for the reflectioncoefficient. For the s polarization, let the reflection and transmission coefficients be rs and ts respectively....
{\displaystyle Z_{0}} . The Smith chart is plotted on the complex reflectioncoefficient plane in two dimensions and may be scaled in normalised impedance...
filtration coefficient (SI units of m4·s·kg−1, or equivalently in m3·s−1·mmHg−1) σ {\displaystyle \sigma } is Staverman's reflectioncoefficient (adimensional)...
The active reflectioncoefficient (ARC) is the reflectioncoefficient for a single antenna element in an array antenna, in the presence of mutual coupling...
of the Fresnel reflectioncoefficient, which is the ratio of the reflected to incident electric field; as such the reflectioncoefficient can be expressed...
transmission coefficient and related reflectioncoefficient are used to describe the behavior of waves incident on a barrier. The transmission coefficient represents...
impedance of the transmission line in use (which together determine the reflectioncoefficient as described below), a given SWR meter can interpret the impedance...
Specular reflection, or regular reflection, is the mirror-like reflection of waves, such as light, from a surface. The law of reflection states that a...
The voltage reflectioncoefficient and current reflectioncoefficient on the same side have opposite signs. Voltage reflectioncoefficients on opposite...
such as gain, return loss, voltage standing wave ratio (VSWR), reflectioncoefficient and amplifier stability. The term 'scattering' is more common to...
larger amplitude than the incident; the device has "reflection gain". The reflectioncoefficient is determined by the AC impedance of the negative resistance...
the impedance mismatch. Mathematically, it is defined using the reflectioncoefficient. Because the principles are the same, this concept is perhaps easiest...
of reflectioncoefficient and standing wave ratio. There are several approaches to understanding reflections, but the relationship of reflections to the...
{\displaystyle \Gamma } (Gamma) is the reflectioncoefficient (0 denotes full transmission, 1 full reflection, and 0.5 is a reflection of half the incoming voltage)...
The total active reflectioncoefficient (TARC) within mathematics and physics scattering theory, relates the total incident power to the total outgoing...
distance one can speak of the far field. The amount of reflection is given by the reflectioncoefficient which is the ratio of the reflected intensity over...
indications). The phenomenon is based on the relationship between the reflectioncoefficient and the angle of incidence and has been understood since the early...
power. Return loss is related to both standing wave ratio (SWR) and reflectioncoefficient (Γ). Increasing return loss corresponds to lower SWR. Return loss...
meaning despite the similarity of name: it is the companion of the reflectioncoefficient. The propagation constant, symbol γ, for a given system is defined...
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