The Pi attenuator (Pi pad) is a specific type of attenuator circuit which resembles the shape of the Greek letter "Π" (Pi). The Pi attenuator consists of one series resistor and two parallel shunt resistors to ground at the input and the output.
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**Note: Like our t attenuator calculator, all of our RF calculators allow SI prefix input. For example, if you wish to input "25000000", just type "25M" instead. See the quick-reference table below for all compatible SI prefixes.