Title:
ELECTROMAGNETIC WAVE ABSORBER AND SENSING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/162831
Kind Code:
A1
Abstract:
This electromagnetic wave absorber is an interference-type electromagnetic wave absorber that comprises a resistance layer, a dielectric layer, and a reflective layer in this order, and that absorbs a specific frequency band of electromagnetic waves. The electromagnetic wave absorber exhibits a maximum absorption amount A0 of less than or equal to 15 dB in the frequency band, and satisfies at least one of expressions (1) and (2). (1): A0-A1≤8(dB)
(2): A0-A2≤8(dB)
(In expression (1) or (2), if the peak frequency when the amount of absorption is at a maximum is f0(GHz), A1 represents the amount of absorption (dB) at f0-7(GHz), and A2 represents the amount of absorption (dB) at f0+7(GHz).)
Inventors:
NISHIYAMA HIROYOSHI (JP)
SHODA RYO (JP)
IMAI MIHO (JP)
SHODA RYO (JP)
IMAI MIHO (JP)
Application Number:
PCT/JP2023/005325
Publication Date:
August 31, 2023
Filing Date:
February 15, 2023
Export Citation:
Assignee:
TOPPAN INC (JP)
International Classes:
H05K9/00; B32B7/023; B32B7/025; H01Q17/00
Domestic Patent References:
| WO2018163584A1 | 2018-09-13 | |||
| WO2021199917A1 | 2021-10-07 |
Foreign References:
| JP2015534052A | 2015-11-26 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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