CPC H01Q 15/02 (2013.01) | 15 Claims |
1. An electromagnetic scattering film, comprising a metal layer, wherein the metal layer is provided with a through hole penetrating through an upper surface and a lower surface of the metal layer, a maximum value of a distance s between any two points on a contour of a section of the through hole is less than a wavelength λ of a microwave emitted into the through hole, so as to cause the microwave to be diffracted after being emitted into the through hole, wherein a ratio of the distance s between any two points on the contour of the section of the through hole to the wavelength λ of the microwave is 1:200-1:100.
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