Find |Z|,|X| from VSWR,|Z|,R,Ro

This calculator finds:

the equivalent series resistance, magnitude of series reactance given VSWR, |Z| and Ro; or
magnitude of impedance and magnitude of series reactance given VSWR,R and Ro.

It is useful for antenna analysers that do not decompose Z into R,X etc but note that it cannot give the sign of X (there is not enough information). Further discussion at The sign of reactance.

SVN:

The calculator does not do a lot of error checking, if you enter nonsense, it will produce nonsense. NaN means not a number, check the input values.

The results might be very sensitive to small changes in the input variables for some input data. It is worth doing a sensitivity analysis (by varying the input values by a small amount) to get some idea of the uncertainty.

Changes

Version	Date	Description
1.01	20/04/2014	Initial.
1.02	23/05/2016	Added R input option.
1.03	14/12/2016	Added X input option
1.04
1.05

Inputs:
VSWR

Ro

Results:
\|Z\| (Ω)
R (Ω)
\|X\| (Ω)
\|θ\| (°)
G (S)
\|B\| (S)

Find |Z|,|X| from VSWR,|Z|,R,Ro

Links

Changes