Rosenberger RF Attenuation Calculator Tool

Attenuator

Design resistive Pi and T pads. Enter a target attenuation and system impedance to get exact resistor values, instantly.

dB
Insertion loss to introduce
Ω
Source and load, matched
W
For resistor power rating
Below about 1 dB, the resistor values become extreme (shunt resistors approach zero, or open) and this topology stops being practical. Consider a different attenuation or topology.

Pi Network

71.15Ω96.25Ω 96.25Ω IN OUT Z = 50ΩZ = 50Ω
Series (R2)
71.15Ω
Shunt ×2 (R1)
96.25Ω
Attenuation
10.0dB
Voltage Ratio
3.162 : 1
Power Ratio
10.000 : 1
Output Power
100.0 mW
Match Quality
Matched, symmetric pad