This Attenuator Calculator is probably unlike any you have seen. Not only does
it calculate resistor values for both balanced and unbalanced Pi and Tee topologies,
but it also calculates the power dissipated by each resistor, and calculates the
input and output VSWR when 1% tolerance resistors are used rather than ideal values.
Equations and schematics for all four configurations can be seen on the
Attenuators page.
Ideal power ratio k =
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