Phillip H. Smith
1905 – 1987
Turned impedance matching into geometry with his chart.
An American engineer at RCA and Bell, Smith invented the chart that bears his name in 1939 — a graphical way to solve transmission-line and impedance-matching problems that every RF engineer still learns.
The VSWR and impedance tools here compute what the Smith chart made visual: reflection and match, turned from arithmetic into geometry.
Portrait: a stylized blueprint-line rendering, not a photograph.
Contributions in the toolbox
- 1939
The Smith chart — reflection made graphical.
→ VSWR / Return Loss / Γ - 1939
Smith chart — L-network design as geometry.
→ L-Network Impedance Match