Cascaded Return Loss Calculator

This tool provides an estimate of the Return Loss of a cascade of two RF subsystems assuming there is no gain, attenuation or impedance transformation in either system. Use this calculator to find the cascaded RL of an attenuator and amplifier.

Enter the Return Loss (RL) in dB of each element in the RF chain.


The reflection coefficient for each element is

Γ = 10-(RL/20)

The cascaded Return Loss is

RL = −20*Log10(√(Γ12 + Γ22)

Example Calculation