Title:
RADIO WAVE ABSORBER AND RADIO WAVE ABSORBING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/168885
Kind Code:
A1
Abstract:
Provided are: a radio wave absorber which has sufficient radio wave absorption characteristics in a higher frequency band of 20-300 GHz, and is capable of self-standing while having an area of at least a certain size; and a radio wave absorbing device using said radio wave absorber. This radio wave absorber comprises: a radio wave absorbing layer 1; and a reinforcement layer 2 disposed on the radio wave 10-incident surface side of the radio wave absorbing layer, wherein the radio wave absorbing layer contains resin binders 1c and at least one among magnetic iron oxide powders 1a, which magnetically resonate in a frequency band of 20-300 GHz, and carbon-based fine particles 1b, the reinforcement layer 2 is formed of a dielectric material, and said radio wave absorber has a plate shape in which the thickness is smaller than the principal surface, and can be self-standing.
Inventors:
HIROI TOSHIO
HATAKEYAMA ATSUSHI
FUJITA RYOHEI
HATAKEYAMA ATSUSHI
FUJITA RYOHEI
Application Number:
PCT/JP2022/004120
Publication Date:
August 11, 2022
Filing Date:
February 02, 2022
Export Citation:
Assignee:
MAXELL LTD (JP)
International Classes:
H05K9/00; B32B7/025; H01F1/113; H01Q17/00; H04B15/02
Domestic Patent References:
| WO2019235364A1 | 2019-12-12 | |||
| WO2017221992A1 | 2017-12-28 | |||
| WO2018084235A1 | 2018-05-11 |
Foreign References:
| JP2005109095A | 2005-04-21 | |||
| JP2004003259A | 2004-01-08 | |||
| JP2009239211A | 2009-10-15 | |||
| JP2008060484A | 2008-03-13 | |||
| JP2016111341A | 2016-06-20 |
Attorney, Agent or Firm:
IKEUCHI & PARTNERS (JP)
Download PDF: