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Encyclopedia > Reflection loss

In telecommunications, reflection loss is one of: Telecommunication involves the transmission of signals over a distance for the purpose of communication. ...

  1. At a discontinuity or impedance mismatch, e.g. in a transmission line, the ratio of the incident power to the reflected power. Reflection loss is usually expressed in dB.
  2. In an optical fiber, the loss that takes place at any discontinuity of refractive index, especially at an air-glass interface such as a fiber endface, at which a fraction of the optical signal is reflected back toward the source. This reflection phenomenon is also called "Fresnel reflection loss," or simply "Fresnel loss."

Bold textReflection Loss Electrical impedance, or simply impedance, is a measure of opposition to a sinusoidal alternating electric current. ... A transmission line is the material medium or structure that forms all or part of a path from one place to another for directing the transmission of energy, such as electromagnetic waves or acoustic waves, as well as electric power transmission. ... In physics, power (symbol: P) is the rate at which work is performed. ... The decibel (dB) is a measure of the ratio between two quantities, and is used in a wide variety of measurements in acoustics, physics and electronics. ... Optical fibers An optical fiber (or fibre) is a glass or plastic fiber designed to guide light along its length by total internal reflection. ... The refractive index (or index of refraction) of a material is the factor by which the phase velocity of electromagnetic radiation is slowed in that material, relative to its velocity in a vacuum. ... Glass can be made transparent and flat, or into other shapes and colors as shown in this sphere from the Verrerie of Brehat in Brittany. ... In telecommunication, signalling (or signaling) has the following meanings: The use of signals for controlling communications. ... In optics, Fresnel reflection is the reflection of a portion of incident light at a discrete interface between two media having different refractive indices. ...


Transmition loss of a line which inturn results in part of the energy being reflected back the the source.


References


Reference http://www.answers.com/topic/reflection-loss Federal Standard 1037C entitled Telecommunications: Glossary of Telecommunication Terms is a U.S. Federal Standard, issued by the General Services Administration pursuant to the Federal Property and Administrative Services Act of 1949, as amended. ... MIL-STD-188 is a series of U.S. military standards relating to telecommunications. ...


  Results from FactBites:
 
Reflection loss - definition of Reflection loss in Encyclopedia (164 words)
Note 1: Reflection loss is usually expressed in dB.
In an optical fiber, the loss that takes place at any discontinuity of refractive index, especially at an air-glass interface such as a fiber endface, at which a fraction of the optical signal is reflected back toward the source.
Note: This reflection phenomenon is also called "Fresnel reflection loss," or simply, "Fresnel loss." At normal incidence, the fraction of reflected power is expressed by the formula, where n
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