VSWR and Return Loss Calculations

Calculator:

VSWR Loss Calculator
VSWR : 1
   
Modifiable Calculated Results
Return Loss (dB) Mismatch Loss (dB)
Loss in % Reflection Coefficient
VSWR Reduction using a matched attenuator
(assuming a perfect 1:1 Attenuator)
Attenuator (dB) Improved VSWR

Definitions:

VSWR (Voltage Standing Wave Ratio) is the measure of how efficiently RF power is transmitted and is expressed as a ratio of the maximum to minimum amplitude (or the voltage or current) of the corresponding field components appearing on a line that feeds an antenna.


Return Loss is a amount of power that is lost to the load and returns back to the system as a reflection. It is expressed in dB - A high return loss means more power is lost at the load.


Loss in % is the percentage of power that is lost to the load and returns back to the system as a reflection. It is expressed in % - A high % loss means more power is lost at the load.


Mismatch loss ia s measurement describing the amount of power that will not be available at the load due to the reflected wave. It indicates the amount of power lost in the system due to the mismatched impedances.


Reflection Coefficient indicates how much of an electromagnetic wave is reflected by an impedance discontinuity in the transmission medium. It is a ratio of the amplitude of the reflected wave to the wave incident at the junction. The magnitude of the reflection coefficient does not depend on the length of the line, only the load impedance and the impedance of the transmission line.



Further Reading:



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Contact Details

A.H. Systems, inc.
9710 Cozycroft Ave.
Chatsworth, CA 91311

P: (818) 998-0223

F: (818) 998-6892

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