The Smith Chart, step by step
The chart is a map of reflection coefficient, drawn in impedance coordinates.
- Know what is plottedThe chart maps reflection coefficient; the outer circle is |Γ| = 1.
- Plot the loadNormalised r + jx sits where its resistance and reactance circles cross.
- Move along the lineRotate clockwise towards the generator; one full turn is half a wavelength.
- Flip for admittanceA half-turn about the centre converts impedance to admittance and back.
- Read off the matchThe centre is a perfect match; distance from it gives |Γ| and VSWR.
The chart maps the whole right half of the impedance plane onto a unit disc, which is why no value ever runs off the page.
Questions about the The Smith Chart poster
- What’s on the The Smith Chart poster?
- 5 numbered steps. The chart is a map of reflection coefficient, drawn in impedance coordinates. Know what is plotted — The chart maps reflection coefficient; the outer circle is |Γ|…; Plot the load — Normalised r + jx sits where its resistance and reactance circles cross.; Move along the line — Rotate clockwise towards the generator; one full turn is half a…; Flip for admittance — A half-turn about the centre converts impedance to admittance a…; Read off the match — The centre is a perfect match; distance from it gives |Γ| and VSWR.. The chart maps the whole right half of the impedance plane onto a unit disc, which is why no value ever runs off the page.
- Who is the The Smith Chart poster for?
- The Smith Chart belongs to the Electrical Engineering section rather than to a school year, because engineering is not something one grade owns. Anyone learning electromagnetics can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the The Smith Chart poster?
- Use it to move along a line or convert impedance to admittance without any algebra. A wall chart earns its place by being glanceable from where the work is happening, so The Smith Chart belongs on the wall where that engineering work actually happens, within glancing distance, rather than filed away.
- What other posters go with The Smith Chart?
- Antenna Fundamentals, Antenna Types and Boundary Conditions sit alongside The Smith Chart in the Electrical Engineering section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Antenna FundamentalsAntenna TypesBoundary Conditions
- Is the The Smith Chart poster free to download and print?
- Yes. The Smith Chart downloads as a free PDF with no account, no email and no watermark, like everything else in the Electrical Engineering section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the The Smith Chart poster print at?
- The Smith Chart is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of The Smith Chart loses nothing.Printing guide
Related posters
Charts that sit alongside The Smith Chart on the same wall.
Browse every Electrical Engineering poster, or start from the full catalogue.