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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.:

US 9424968 B1

PDFFull Text
Date of Patent:
Aug. 23, 2016

Filed:

Jan. 17, 2012

Magnetic material for antennas, antenna, and wireless communication device

Applicants:

Tomokazu Ishikura, Tokyo, JP;

Michihiro Muramoto, Tokyo, JP;

Akihiro Harada, Tokyo, JP;

Katsumi Kawasaki, Tokyo, JP;

Tomofumi Kuroda, Tokyo, JP;

Inventors:

Tomokazu Ishikura, Tokyo, JP;

Michihiro Muramoto, Tokyo, JP;

Akihiro Harada, Tokyo, JP;

Katsumi Kawasaki, Tokyo, JP;

Tomofumi Kuroda, Tokyo, JP;

Assignee:

TDK CORPORATION, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Dameon E Levi

Assistant Examiner:

Ricardo Magallanes

Int. Cl.
CPC ...
H01Q 13/00 (2006.01); C04B 35/00 (2006.01); B05D 5/12 (2006.01); H01F 1/10 (2006.01); H01Q 1/24 (2006.01); H01Q 1/36 (2006.01); H01Q 5/00 (2015.01); H01Q 9/42 (2006.01); C04B 35/26 (2006.01); C04B 35/626 (2006.01); C04B 38/00 (2006.01); C04B 111/00 (2006.01);
U.S. Cl.
CPC ...
H01F 1/10 (2013.01); C04B 35/2633 (2013.01); C04B 35/2641 (2013.01); C04B 35/2683 (2013.01); C04B 35/62685 (2013.01); C04B 38/00 (2013.01); H01Q 1/243 (2013.01); H01Q 1/364 (2013.01); H01Q 5/00 (2013.01); H01Q 9/42 (2013.01); C04B 2111/00844 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3208 (2013.01); C04B 2235/3213 (2013.01); C04B 2235/3215 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3224 (2013.01); C04B 2235/3232 (2013.01); C04B 2235/3241 (2013.01); C04B 2235/3244 (2013.01); C04B 2235/3263 (2013.01); C04B 2235/3272 (2013.01); C04B 2235/3275 (2013.01); C04B 2235/3279 (2013.01); C04B 2235/3281 (2013.01); C04B 2235/3284 (2013.01); C04B 2235/3286 (2013.01); C04B 2235/3293 (2013.01); C04B 2235/3298 (2013.01); C04B 2235/3418 (2013.01); C04B 2235/767 (2013.01); C04B 2235/786 (2013.01);
Abstract

A magnetic material for antennas including: an M-type hexagonal ferrite represented by the following general formula (1) as a main phase, MA.Fe.MB.O(wherein MA is at least one kind selected from the group consisting of Sr and Ba, MB is MC or MD, MC is at least one kind selected from the group consisting of Al, Cr, Sc and In, MD is an equivalent mixture of at least one kind selected from the group consisting of Ti, Sn and Zr and at least one kind selected from the group consisting of Ni, Zn, Mn, Mg, Cu and Co, X is a number from 1 to 5), and an average crystal particle diameter is equal to or greater than 5 μm.

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