Pi Attenuator Calculator

Bridged-Tee Attenuator Calculator

Reflection Attenuator Calculator

Tee Attenuator Calculator

A Pi Attenuator uses a single series resistor, and two shunts to ground (input and output) to attenuate a signal. This calculator lets the user enter in the desired attenuation (in dB) and the system impedance (Zo in Ω’s) and it will calculate the needed shunt resistors (R1) and series resistor (R2).

A bridged tee attenuator is a modified pi topology attenuator. The bridged tee attenuator will let you attenuate the signal without changing the systems impedance.

This reflection attenuator calculator lets you find two possible resistor values for a reflection attenuator. A reflection attenuator uses two equal resistors grounded and tied to the same node to attenuate a signal. There are two possible outputs depending on if your resistance is higher than your system impedance.

This Tee Attenuator Calculator will calculate the values of R1 and R2. Please enter in the needed attenuation and the impedance of the line to be matched.

ATTENUATION (DB)
Value is out of range
IMPEDANCE
Ω
Value is out of range
R 1
Ω
R1 value is out of range
R 2
Ω
R2 value is out of range
FORMULAS
R 1 R 2 R 1
ATTENUATION (DB)
Value is out of range
IMPEDANCE
Ω
Value is out of range
R 1
Ω
R1 value is out of range
R 2
Ω
R2 value is out of range
FORMULAS
R 2 Z 0 Z 0 R 1
ATTENUATION (DB)
DB
Value is out of range
IMPEDANCE
Ω
Value is out of range
R 1 > Z 0
Ω
Value is out of range
R 1 < Z 0
Ω
Value is out of range
FORMULAS
R 1 R 2
ATTENUATION (DB)
Value is out of range
IMPEDANCE
Ω
Value is out of range
R 1
Ω
R1 value is out of range
R 2
Ω
R2 value is out of range
FORMULAS
R 2 R 1 R 1