公开(公告)号：US20220142018A1

公开(公告)日：2022-05-05

申请号：US17434978

申请日：2020-02-06

Applicant: LINTEC Corporation

Inventor： Taiga MATSUSHITA

IPC: H05K9/00

Abstract: An aspect of the present invention provides an electromagnetic wave absorption film that is less susceptible to the surrounding environment.
An electromagnetic wave absorption film 10 has: a planar base 20; a first electromagnetic wave absorption pattern 1 formed on the base 20; a second electromagnetic wave absorption pattern 2 formed on the base 20; and a third electromagnetic wave absorption pattern 3 formed on the base 20, wherein when A [GHz] is defined as a frequency at which an absorption amount of an electromagnetic wave absorbed by the first electromagnetic wave absorption pattern 1 exhibits its local maximum value in a range from 20 to 110 GHz, B [GHz] satisfies Expression (1), B [GHz] being the value of a frequency at which an absorption amount of an electromagnetic wave absorbed by the second electromagnetic wave absorption pattern 2 exhibits its local maximum value, and C [GHz] satisfies Expression (2), C [GHz] being the value of a frequency at which an absorption amount of an electromagnetic wave absorbed by the third electromagnetic wave absorption pattern 3 exhibits its local maximum value, 1.037×A≤B≤1.30×A  Expression (1) 0.60×A≤C≤0.963×A  Expression (2).

公开(公告)号：US20230139564A1

公开(公告)日：2023-05-04

申请号：US17911917

申请日：2021-03-03

Applicant: LINTEC CORPORATION

Inventor： Masaharu ITO ,  Takashi MORIOKA ,  Taiga MATSUSHITA ,  Yuma KATSUTA

IPC: G01S7/40 ,  G01S7/02

Abstract: A pseudo sheet structure is usable for a sensor configured to emit an electromagnetic wave in a band ranging from 20 GHz to 100 GHz. The pseudo sheet structure includes a plurality of conductive linear bodies arranged at an interval L satisfying a formula (1) below, 0.034×λS≤L≤20 mm (1). In the formula (1), L is the interval between the plurality of conductive linear bodies, λS is a wavelength of the electromagnetic wave emitted by the sensor, and a unit for each of L and λS is mm.