The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 24, 2024
Filed:
May. 31, 2019
Applicant:
Maxell, Ltd., Kyoto, JP;
Inventors:
Toshio Hiroi, Kyoto, JP;
Masao Fujita, Kyoto, JP;
Assignee:
Maxell, Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/34 (2006.01); H01Q 17/00 (2006.01); H05K 9/00 (2006.01);
U.S. Cl.
CPC ...
H01F 1/348 (2013.01); H01Q 17/002 (2013.01); H05K 9/0081 (2013.01);
Abstract
To provide a transmission-type electromagnetic-wave absorber that can satisfactorily absorb electromagnetic waves of high frequencies in or above the millimeter wave band while reducing the reflection of electromagnetic waves on the surface of the absorber. The transmission-type electromagnetic-wave absorber includes an electromagnetic-wave absorbing layercontaining a magnetic iron oxidea that magnetically resonates at a frequency in or above the millimeter-wave band and a binderb containing an organic material. The real part of the complex relative permittivity of the electromagnetic-wave absorber is 5.5 or less at 1 GHz.