T Attenuator Calculator

Calculates the resistor values, attenuation, 'impedance', reflection coefficient, VSWR and return loss of a T attenuator. This can be built into a FLEXI-BOX, and a transmission line PCB is available which easily adapts for this circuit. There is also a selection of suitable connectors available.

[T attenuator circuit]

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 value of series resistor:  Ohms Attenuation:   dB
Preferred value of shunt resistor:   Ohms Input Impedance:   Ohms
VSWR: 
Reflection Coefficient: 
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

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Copyright © 2008 CHEMANDY ELECTRONICS
Last modified: March 25, 2008