CHEMANDY ELECTRONICS Suppliers of the unusual

Pi Attenuator Calculator

Calculates the resistor values, attenuation, 'impedance', reflection coefficient, VSWR and return loss of a Pi attenuator. This can be built into a FLEXI-BOX and a transmission line PCB is available which easily adapts for this circuit with one simple trimming operation. There is also a selection of suitable RF connectors available.

[pi attenuator formula]

1) Enter the system impedance and required attenuation then then press "Calculate" below to obtain the ideal resistor values.

System impedance:   Ohms Ideal series resistor:   Ohms
Required attenuation:   dB Ideal shunt resistor:   Ohms
 
2) Change the Preferred Resistor Values to those available then press " Calculate" below to get the resulting attenuator parameters.
 
Preferred series resistor:   Ohms Attenuation:   dB
Preferred shunt resistor:   Ohms Input Impedance:   Ohms
Reflection Coefficient: 
VSWR: 
Return Loss:   dB
 

This calculator uses JavaScript and will function in most modern browsers. For more information see About our calculators

The calculator uses simple Ohms law calculations, and more comprehensive formulas for Voltage Reflection Coefficient and VSWR which are available at:-

http://www.kathrein-scala.com/tech_bulletins/EngRef.pdf

This calculator is provided free by Chemandy Electronics in order to promote the FLEXI-BOX

Return to Calculator Index

Send email using the Contact Us page with questions about our products or comments about this web site. Return to Home page