Slovník pojmůEvanescent waveEvanescent wave is not a real wave in a fact. Phase does not change in the propagation direction because phase constant is zero. Amplitude exponentially decreases because attenuation constant is non-zero. Evanescent wave can appear (under certain circumstances) on the boundary of two media when wave propagates in parallel with the boundary in one medium. Then, the wave does not enter the second medium, but electromagnetic field diffuses there (evanescent wave). Zpět
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