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| Diagramme de Smith× | Méthode de la Matrice de Ligne de Transmission× | |
|---|---|---|
| Domaine | Génie électrique | Génie électrique |
| Famille | Process / pipeline | Process / pipeline |
| Année d'origine≠ | 1939 | 1971 |
| Auteur d'origine≠ | Phillip H. Smith | Peter Johns |
| Type≠ | Graphical tool for transmission line and impedance analysis | Transmission line network analogous to electromagnetic fields |
| Source fondatrice≠ | Smith, P. H. (1939). Transmission line calculator. Electronics, 12(1), 29-31. link ↗ | Johns, P. B., & Beurle, R. L. (1971). Numerical solution of 2-D scattering problems using a transmission-line calculator. Proceedings of the IEE, 118(9), 1203-1208. link ↗ |
| Alias | Impedance chart, Reflection coefficient chart | TLM, Transmission line matrix |
| Apparentées | 3 | 3 |
| Résumé≠ | The Smith Chart is a graphical tool for visualizing and manipulating complex impedances and reflection coefficients on transmission lines. Introduced by Phillip Smith in 1939, the chart maps the complex reflection coefficient plane to a circular chart, enabling intuitive graphical analysis of transmission line problems, impedance matching, and resonance conditions. Despite the advent of computers, the Smith Chart remains invaluable for understanding transmission line physics and designing RF circuits. | The Transmission-Line Matrix (TLM) method is a direct discretization of Maxwell equations using an equivalent transmission line network. Introduced by Johns and Beurle in 1971, TLM models electromagnetic fields as voltage and current waves propagating on coupled transmission lines. The method is intuitive, numerically stable, and efficient for both transient and frequency-domain electromagnetic problems. TLM remains competitive with FDTD and FIT for many RF and microwave applications. |
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