Return Loss
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Return Loss
What is Return Loss?
Return loss is essentially the dB difference between the power sent to the antenna and the power reflected back due to an impedance mismatch.
A higher value of return loss, is better than a lower value.
If VSWR is large, a large amount of voltage is being reflected back toward the transmitter. This of course means a decrease in power or amplitude (loss) of the signal that is supposed to be transmitted.
This loss of forward amplitude is known as return loss and can be measured in dB.
Additionally, the power that is being reflected back is then directed back into the transmitter. If the transmitter is not protected from excessive reflected power or large voltage peaks, it can overheat and fail.
Improperly installed connectors will add more loss to the communications link, which can nullify the extra money you spend for the better-quality cable. It can also introduce return loss in the cable due to reflections.
What is Return Loss?
Return loss is essentially the dB difference between the power sent to the antenna and the power reflected back due to an impedance mismatch.
A higher value of return loss, is better than a lower value.
If VSWR is large, a large amount of voltage is being reflected back toward the transmitter. This of course means a decrease in power or amplitude (loss) of the signal that is supposed to be transmitted.
This loss of forward amplitude is known as return loss and can be measured in dB.
Additionally, the power that is being reflected back is then directed back into the transmitter. If the transmitter is not protected from excessive reflected power or large voltage peaks, it can overheat and fail.
Improperly installed connectors will add more loss to the communications link, which can nullify the extra money you spend for the better-quality cable. It can also introduce return loss in the cable due to reflections.
Reference:
Coleman, David D.,Westcott, David A. CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106 Wiley.
Coleman, David D.,Westcott, David A. CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106 Wiley.
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