US 11,791,560 B2
Electromagnetic scattering film and electronic device with electromagnetic scattering film
Zhi Su, Guangzhou (CN); and Qiang Gao, Guangzhou (CN)
Assigned to GUANGZHOU FANGBANG ELECTRONICS CO., LTD, Guangzhou (CN)
Appl. No. 17/615,227
Filed by GUANGZHOU FANGBANG ELECTRONICS CO., LTD, Guangzhou (CN)
PCT Filed Dec. 17, 2019, PCT No. PCT/CN2019/125928
§ 371(c)(1), (2) Date Nov. 30, 2021,
PCT Pub. No. WO2020/244190, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 201910489146.X (CN), filed on Jun. 5, 2019; application No. 201920847012.6 (CN), filed on Jun. 5, 2019; and application No. 201910892056.5 (CN), filed on Sep. 20, 2019.
Prior Publication US 2022/0231422 A1, Jul. 21, 2022
Int. Cl. H01Q 15/02 (2006.01)
CPC H01Q 15/02 (2013.01) 15 Claims
OG exemplary drawing
 
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.