Back Mode transversal Catalan Optický vid Czech Transversalelektromagnetische Welle German Ρυθμός κυματοδήγησης Greek Modo transversal electromagnético Spanish TEM-aaltomuoto Finnish Mode transverse French Skersinė moda Lithuanian Mod (falowód) Polish
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A transverse mode of electromagnetic radiation is a particular electromagnetic field pattern of the radiation in the plane perpendicular (i.e., transverse) to the radiation's propagation direction. Transverse modes occur in radio waves and microwaves confined to a waveguide, and also in light waves in an optical fiber and in a laser's optical resonator.[1]
Transverse modes occur because of boundary conditions imposed on the wave by the waveguide. For example, a radio wave in a hollow metal waveguide must have zero tangential electric field amplitude at the walls of the waveguide, so the transverse pattern of the electric field of waves is restricted to those that fit between the walls. For this reason, the modes supported by a waveguide are quantized. The allowed modes can be found by solving Maxwell's equations for the boundary conditions of a given waveguide.