Printable Smith Chart
Constant-resistance circles and constant-reactance arcs on the reflection coefficient plane, drawn as clean vector lines.
Constant-resistance circles and constant-reactance arcs on the reflection coefficient plane, drawn as clean vector lines.
Choose Smith Chart from the list. It opens with the usual size already set.
Pick the paper size, the grid and the orientation. Customize holds colours, margins and more.
Download the ready PDF, or print straight from the page at 100% scale.
The Smith chart maps the whole right half of the impedance plane — every impedance with a non-negative real part — into a unit circle, by plotting the reflection coefficient instead of the impedance itself. Infinity gets folded onto the right edge, and everything fits on one page.
The lines you see are the images of that mapping: constant resistance becomes a family of circles all touching at the right, and constant reactance a family of arcs running off the same point.
A Smith chart is not primarily an arithmetic aid any more. It is a picture of what a matching network is doing.
Every sheet here is free, adjustable and prints at exact scale.
Yes. The centre is 1.0, meaning your system impedance — usually 50 Ω. Multiply the values you read off by that to get real impedances.
No, this is the impedance chart alone, kept clean for drawing on. For admittance work, rotate a point 180° about the centre.
As large as you can. A3 gives noticeably better resolution for hand plotting than A4, and the vector PDF scales to either without softening.
