Pi Attenuator Calculator

Pi Attenuator Calculator calculator can be used to calculate the characteristic impedance and attenuation of a Pi attenuator based on input parameters.

Input Parameters

Calculation Results

Calculation Formula

Z₀ = Z₀₀ / (1 + (10^(α/8)) - 1)^(1/2)

Where:
Z₀ = Characteristic Impedance (Ω)
Z₀₀ = Source Impedance (Ω)
α = Attenuation in dB (decibels)

Characteristic Impedance (Z₀):

0 Ω

Source Impedance (Z₀₀):

50 Ω

Attenuation (dB):

0 dB

Pi Attenuator Calculator Usage Guide

Learn how to use the Pi Attenuator Calculator calculator and its working principles

What is a Pi Attenuator?

A Pi attenuator is a type of RF (Radio Frequency) attenuator circuit that uses three resistors arranged in a pi (π) shape to reduce signal power. It is commonly used in RF circuits to protect sensitive equipment from high power signals.

How to Use the Calculator

  1. Enter the frequency of the signal in MHz.
  2. Enter the desired attenuation level in dB.
  3. Click the "Calculate" button to compute the characteristic impedance and other parameters.

Working Principle

The characteristic impedance (Z₀) of a Pi attenuator is calculated based on the source impedance (typically 50Ω for most RF applications) and the attenuation level. The formula used is:

Z₀ = Z₀₀ / √((10^(α/8)) - 1)

Where:

  • Z₀ = Characteristic Impedance
  • Z₀₀ = Source Impedance
  • α = Attenuation in dB

Applications

Pi attenuators are used in various applications including:

  • RF signal testing and measurement
  • Protecting RF receivers from over-strong signals
  • Matching impedance in RF circuits