Isometric graph paper
Draw along three directions with equal spacing for isometric sketches.
Printable Smith chart
Plot normalized impedance on resistance circles and reactance arcs. The chart is drawn from the impedance-to-reflection formula.
215.9 mm · 8.5 in279.4 mm
1 page · US Letter · Portrait
US Letter · 1 page
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How to read it
Divide the impedance by the line’s own impedance first. On a 50-ohm line, a load of 50 + j50 ohms is z = 1 + j1: plot it where the circle marked 1 meets the arc marked +1. Positive reactance, inductive, is in the upper half and negative, capacitive, in the lower. The centre is z = 1, a perfect match; the left end of the line across the middle is a short circuit and the right end an open circuit.
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