Le Leivre.com

PI Attenuator Calculator

Enter values for R1 and R2 to calculate attenuator loss and impedance.
Alternatively, Generate R1 and R2 for a wanted attenuation.

Circuit Diagram
R1
Ω
Zo
Ω
R2
Ω

Attenuation

Return Loss


Attenuation
dB


Notes:
*Strictly, a loss quantity when expressed in dB should be positive. However, convention and some literature quote return loss as a negative value akin to an S(1,1) measurement on a Network analyser.
*Attenuation result is in the specified system Zo