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| Momentmetoden× | Smithdiagram× | |
|---|---|---|
| Ämnesområde | Elektroteknik | Elektroteknik |
| Familj | Process / pipeline | Process / pipeline |
| Ursprungsår≠ | 1968 | 1939 |
| Upphovsperson≠ | Roger F. Harrington | Phillip H. Smith |
| Typ≠ | Boundary integral equation method for solving Maxwell equations | Graphical tool for transmission line and impedance analysis |
| Ursprungskälla≠ | Harrington, R. F. (1968). Field Computation by Moment Methods. Macmillan. link ↗ | Smith, P. H. (1939). Transmission line calculator. Electronics, 12(1), 29-31. link ↗ |
| Alias | MoM, Boundary element method (electromagnetics) | Impedance chart, Reflection coefficient chart |
| Närliggande | 3 | 3 |
| Sammanfattning≠ | The Method of Moments (MoM) is a powerful numerical technique for solving electromagnetic boundary integral equations derived from Maxwell equations. Pioneered by Roger Harrington in 1968, MoM discretizes only radiating surfaces and boundaries (antennas, conductors, dielectrics), not the surrounding space, making it efficient for radiation and scattering problems. MoM remains the standard tool for antenna design, electromagnetic compatibility analysis, and RF/microwave engineering. | 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. |
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