US 12,230,862 B2
Antenna
Tianhua Ouyang, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Nov. 10, 2022, as Appl. No. 18/054,309.
Application 18/054,309 is a continuation of application No. PCT/JP2021/015567, filed on Apr. 15, 2021.
Claims priority of application No. 2020-084819 (JP), filed on May 13, 2020.
Prior Publication US 2023/0089629 A1, Mar. 23, 2023
Int. Cl. H01Q 1/12 (2006.01); H01Q 1/24 (2006.01); H01Q 1/48 (2006.01); H01Q 9/04 (2006.01)
CPC H01Q 1/1271 (2013.01) [H01Q 1/243 (2013.01); H01Q 1/48 (2013.01); H01Q 9/0407 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An antenna comprising:
a transparent film substrate;
an antenna element that is provided on one surface among two surfaces of the transparent film substrate; and
a ground part that is provided on the other surface among the two surfaces of the transparent film substrate,
wherein the antenna element and the ground part are formed of a mesh pattern formed of a fine silver wire,
a line width of the fine silver wire is 1.0 μm or more and less than 5.0 μm,
a thickness of the transparent film substrate is 30 μm or more and 300 μm or less,
a feeding line is provided on the one surface of the transparent film substrate,
the feeding line is formed of the mesh pattern formed of the fine silver wire,
the line width of the fine silver wire is 2.1 μm or more and 3.7 μm or less, and
in a case where the transparent film substrate is observed from the one surface or the other surface, a surface roughness of the fine silver wire of the one surface or the other surface on an observation side is represented by Rq(A), and a surface roughness of the fine silver wire of the other surface or the one surface on a transparent film substrate side opposite to the observation side is represented by Rq(B),
0.05 μm≤Rq(A)≤0.35 μm and |Rq(B)−Rq(A)|≤0.25 μm are satisfied.