ELECTROMAGNETIC WAVE ABSORPTION FILM, ELECTROMAGNETIC WAVE ABSORPTION SHEET

WIPO Patent Application WO/2020/179349

A1

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 comprising: 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 a frequency at which an absorption amount of electromagnetic waves absorbed by the first electromagnetic wave absorption pattern 1 exhibits its maximum value in a range of 20 to 110 GHz is A GHz, the value of a frequency at which an absorption amount of electromagnetic waves absorbed by the second electromagnetic wave absorption pattern 2 exhibits its maximum value is B GHz that satisfies expression (1) indicated below, and the value of a frequency at which an absorption amount of electromagnetic waves absorbed by the third electromagnetic wave absorption pattern 3 exhibits its maximum value is C GHz that satisfies expression (2) indicated below.　1.037 × A ≤ B ≤ 1.30 × A Expression (1) 0.60 × A ≤ C ≤ 0.963 × A Expression (2)

JP2000258526	SHIELD FENCE, RADAR AND MANUFACTURE OF RADAR
JPS63204799	WAVE ABSORBER

MATSUSHITA TAIGA (JP)

PCT/JP2020/004578

September 10, 2020

February 06, 2020

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LINTEC CORP (JP)

H01Q17/00; B32B7/025; H05K9/00

US20140111365A1	2014-04-24
JP2009170887A	2009-07-30
JP2005317945A	2005-11-10
US5214432A	1993-05-25
US20140240159A1	2014-08-28
JP2019037839A	2019-03-14
JP2019094552A	2019-06-20
JP5162424B2	2013-03-13

See also references of EP 3934025A4

NISHIZAWA Kazuyoshi et al. (JP)

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