Attenuation Calculator

ATTENUATION (DB)

IMPEDANCE

R₁

R₂

ATTENUATION (DB)

IMPEDANCE

R₁

R₂

ATTENUATION (DB)

IMPEDANCE

R₁

R₂

Pi Attenuator

The Pi attenuator (Pi pad) is a specific type of RF attenuator circuit which resembles the shape of the Greek letter for Pi. The Pi attenuator consists of one series resistor and two parallel shunt resistors to ground at the input and the output.

FORMULAS

$$ R_1 = Z_0 \left( \frac{10^{\frac{A_{dB}}{20}} + 1}{10^{\frac{A_{dB}}{20}} - 1} \right) $$

$$ R_2 = \frac{Z_0}{2} \left( 10^{\frac{A_{dB}}{20}} - \frac{1}{10^{\frac{A_{dB}}{20}}} \right) $$

Bridged-Tee Attenuator

A bridged-T attenuator uses resistors in a specific configuration to reduce signal amplitude while maintaining impedance matching, ensuring minimal signal reflection and power loss in RF circuits.

FORMULAS

$$ R_1 = Z_0 \left( 10^{\frac{A_{dB}}{20}} - 1 \right) $$

$$ R_2 = Z_0 \left( \frac{1}{10^{\frac{A_{dB}}{20}} - 1} \right) $$

Tee Attenuator

A T attenuator consists of three resistors in a T configuration, used to reduce signal amplitude while maintaining impedance matching, minimizing signal reflection and power loss in RF and audio applications.

FORMULAS

$$ R_1 = Z_0 \left( \frac{10^{\frac{A_{dB}}{20}} - 1}{10^{\frac{A_{dB}}{20}} + 1} \right) $$

$$ R_2 = 2Z_0 \left( \frac{10^{\frac{A_{dB}}{20}}}{10^{\frac{A_{dB}}{10}} - 1} \right) $$