Concepts and features
R&S
®
ZNA
119
User Manual 1178.6462.02 ─ 20
Inv Smith
For "Inv Smith" formatted traces, the response values are interpreted as complex
reflection coefficients S
ii
and represented in terms of their corresponding complex
admittance Y(S
ii
) = G(S
ii
) + j B(S
ii
).
In a diagram, the grid lines overlaid to a "Smith" trace correspond to points of equal
conductance G and susceptance B:
●
Points with the same conductance are located on circles.
●
Points with the same susceptance produce arcs.
The following example shows an inverted Smith chart with a marker used to display the
stimulus value, the complex admittance Y = G + j B and the equivalent inductance L.
Inverted Smith chart construction
The inverted Smith chart is point-symmetric to the Smith chart:
Screen elements
