Title:
RADIO WAVE ABSORBER AND METHOD FOR FORMING RADIO WAVE ABSORBER
Document Type and Number:
WIPO Patent Application WO/2022/163338
Kind Code:
A1
Abstract:
A radio wave absorber comprising a first layer and a second layer stacked one upon the other, each having a different permittivity. The permittivities of the first layer and the second layer are set so that a first reflected wave and a second reflected wave have the same intensity. The thickness of the first layer is set so that the first reflected wave and the second reflected wave have a phase difference to cancel at least partly each other out. The first reflected wave is a wave reflected on an exposed surface of the first layer when a target radio wave having a designated frequency enters the exposed surface of the first layer. The second reflected wave is a reflected wave exiting from the exposed surface of the first layer after the entry through the exposed surface of the first layer followed by reflection at an interface between the first layer and the second layer. The exposed surface of the first layer is a surface of the first layer opposite the interface.
Inventors:
KAWAGUCHI KAZUSHI (JP)
KAMIGASAKO MAKOTO (JP)
KAMIGASAKO MAKOTO (JP)
Application Number:
PCT/JP2022/000503
Publication Date:
August 04, 2022
Filing Date:
January 11, 2022
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H01Q1/42; G01S7/03; H01Q17/00; H05K9/00
Foreign References:
| JPH11231041A | 1999-08-27 | |||
| JP2019158592A | 2019-09-19 | |||
| JP2013257275A | 2013-12-26 | |||
| JP2020106384A | 2020-07-09 | |||
| JP5474078B2 | 2014-04-16 | |||
| JP2004200895A | 2004-07-15 |
Attorney, Agent or Firm:
NAGOYA INTERNATIONAL PATENT FIRM (JP)
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