Pi Attenuator Calculator and Formula

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attenuator
attenuation
resistor
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This page provides a Pi attenuator calculator and explains the formula used for its calculations.

Pi Attenuator Calculator Example

Inputs

Outputs

  • Impedance: 50 Ohms
  • Attenuation: 3dB

Calculated Values:

  • R1 = R2 = 16.6 Ohms (Use standard 18 Ohm resistor)
  • R3 = 66.9 Ohms (Use standard 66.5 Ohm resistor)

Pi Attenuator Formula

A Pi attenuator pad is a simple circuit layout designed to incorporate three RF chip resistors. It’s commonly used in RF circuit designs to introduce attenuation into the RF signal path.

The specific values of the Pi attenuator are selected based on the required power levels at different points within the RF circuit. This ensures that the power levels at critical points align with the 1dB compression points of the devices in the transmit or receive chain.

3dB and 6dB attenuator pads are frequently used in circuit designs.

The following formula is used to calculate the resistor values for a Pi attenuator:

pi attenuator calculator formula

Formula Explanation: The above formula dictates how different resistor values are calculated to achieve the desired attenuation in the PI attenuator pad circuit designs.

T Attenuator Calculator and Formula

T Attenuator Calculator and Formula

Calculate resistor values for T attenuators with our calculator and explore the formulas behind its function in RF circuits.

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calculator
rf
RF Attenuator Pad Calculator

RF Attenuator Pad Calculator

Calculate resistor values for π-type and T-type RF attenuator pads, including formulas for impedance and attenuation.

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attenuator
calculator
Bridged Tee Attenuator Calculator

Bridged Tee Attenuator Calculator

Calculate the resistance values (R1, R2) for a Bridged Tee attenuator given impedance and attenuation using this online calculator.

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tee attenuator
bridged tee