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Return Loss
Mar 17, 2018

Return Loss

Return loss, also known as reflection loss. It is the reflection of the fiber/wire cable link due to the impedance mismatch and is a reflection of the pair of lines themselves. Mismatches occur mainly at the connectors, but may also occur where the characteristic impedance of the cable changes, so construction quality is the key to improving return loss. The return loss will introduce signal fluctuations, and the returned signal will be confused by the duplex Gigabit network as the received signal.


return loss testing.jpg


Return loss is the ratio of the reflected wave power to the incident wave power at the transmission line port. It is expressed in logarithmic form. The unit is dB, which is generally negative. The absolute value can be called reflection loss.

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