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.

This calculator uses Visual Basic and will work in Internet Explorer and other browsers with Visual Basic plug-ins. For more information see About our calculators. A further simple T Attenuator Calculator is available in JavaScript.

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

http://www.spectrum-soft.com/news/fall2009/vswr.shtm

Note: With the Mismatch Losses box ticked the calculator will return an attenuation calculated from the source power in relation to the attenuator output power which is suitable for calculations at RF and Microwave frequencies, particularly if the attenuator is located away from the source at the end of a transmission line. Without the Mismatch Losses box ticked the calculator will return an attenuation calculated from the actual input power to the attenuator in relation to the output power which is more suitable for calculations at audio frequencies. The difference in attenuation with the two methods is only noticeable when there is a significant mismatch.

Mismatch Losses added on 31/12/2012

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

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