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:
Oct. 02, 2012
Filed:
Jul. 16, 2009
Kenichi Ishizuka, Yokohama, JP;
Kazunari Kawahata, Yokohama, JP;
Nobuhito Tsubaki, Yokohama, JP;
Shigeyuki Fujieda, Hakusan, JP;
Shinichi Nakano, Sagamihara, JP;
Kenichi Ishizuka, Yokohama, JP;
Kazunari Kawahata, Yokohama, JP;
Nobuhito Tsubaki, Yokohama, JP;
Shigeyuki Fujieda, Hakusan, JP;
Shinichi Nakano, Sagamihara, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A compact and low-cost antenna device in which no interference occurs even when many antenna units corresponding to various systems are mounted close together in a small area, and a wireless communication apparatus including the antenna device. An antenna device includes plural antenna units mounted on a single dielectric base. A first antenna unit having a lowest fundamental frequency is disposed at a left end of a non-ground region, a second antenna unit having a highest fundamental frequency of the plurality of the antenna units is disposed at a right end of the non-ground region, and a third antenna unit having a fundamental frequency between those of the first antenna unit and the second antenna unit is disposed between the first and second antenna units. A current-density control coil is connected between a first radiation electrode and a power feeder of the first antenna unit, while a reactance circuit is disposed in the middle of the first radiation electrode. Notches may be disposed between the first radiation electrode and a second radiation electrode and between the first radiation electrode and a third radiation electrode.