公开(公告)号：US20230253701A1

公开(公告)日：2023-08-10

申请号：US18189780

申请日：2023-03-24

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Mohsen SALEHI ,  Stephen J. ETZKORN ,  Jaewon KIM ,  Brett J. SITTER

IPC: H01Q1/42 ,  H01Q1/32 ,  B32B7/025 ,  B32B27/08 ,  B32B7/12 ,  B32B5/02 ,  B32B27/12 ,  B32B17/10

CPC classification number: H01Q1/424 ,  H01Q1/3283 ,  H01Q1/421 ,  B32B7/025 ,  B32B27/08 ,  B32B7/12 ,  B32B5/022 ,  B32B27/12 ,  B32B17/10

Abstract: A gradient permittivity film comprises (a) a first permittivity layer comprising a first continuous matrix of a first material having a first relative permittivity (εr1) and a second component having a second relative permittivity (εr2) dispersed in the first continuous matrix, the first permittivity layer having a first effective layer relative permittivity (ε1) and a thickness (T1); And (b) a second permittivity layer having a second effective layer relative permittivity (ε2) and a thickness (T2) disposed on the first permittivity layer. T1=0.8(t1) to 1.2(t1), where







t
1

=

c

4
⁢
f
⁢


ε
1





;

⁢





T
2

=

0.8

(

t
2

)

⁢

to

1.2


(

t
2

)



,




where
⁢


t
2


=


c

4
⁢
f
⁢


ε
2




.

公开(公告)号：US20210159591A1

公开(公告)日：2021-05-27

申请号：US17045559

申请日：2019-04-05

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Mohsen SALEHI ,  Stephen J. ETZKORN ,  Jaewon KIM ,  Brett J. SITTER

IPC: H01Q1/42 ,  H01Q1/32

Abstract: A gradient permittivity film comprises (a) a first permittivity layer comprising a first continuous matrix of a first material having a first relative permittivity (εr1) and a second component having a second relative permittivity (εr2) dispersed in the first continuous matrix, the first permittivity layer having a first effective layer relative permittivity (ε1) and a thickness (T1); and (b) a second permittivity layer having a second effective layer relative permittivity (ε2) and a thickness (T2) disposed on the first permittivity layer T1=0.8(t1) to 1.2(t1), where t1=(I); T2=0.8(t2) to 1.2 (T2), where T2=(II). t 1 = c 4  f  ɛ 1 ( I ) t 2 = c 4  f  ɛ 2 ( II )