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:
Jan. 18, 2011
Filed:
May. 30, 2008
Kanji Otsuka, Higashiyamato-shi, Tokyo 207-0002, JP;
Tamotsu Usami, Kokubunji-shi, Tokyo 185-0035, JP;
Yutaka Akiyama, Hachioji-shi, Tokyo 192-0914, JP;
Chihiro Ueda, Adachi-ku, Tokyo 121-0801, JP;
Kanji Otsuka, Higashiyamato-shi, Tokyo 207-0002, JP;
Tamotsu Usami, Kokubunji-shi, Tokyo 185-0035, JP;
Yutaka Akiyama, Hachioji-shi, Tokyo 192-0914, JP;
Chihiro Ueda, Adachi-ku, Tokyo 121-0801, JP;
Other;
Renesas Electronics Corporation, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Fujitsu Microelectronics Limited, Tokyo, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Ibiden Co., Ltd, Gifu, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
An antenna apparatus utilizing an aperture of transmission line, which is connected to a first transmission line having a predetermined characteristic impedance, includes a tapered line portion, and an aperture portion. The tapered line portion is connected to one end of the transmission line, and the tapered line portion includes a second transmission line including a pair of line conductors. The tapered line portion keeps a predetermined characteristic impedance constant and expands at least one of a width of the transmission line and an interval in a tapered shape at a predetermined taper angle. The aperture portion has a radiation aperture connected to one end of the tapered line portion. A size of one side of the aperture end plane of the aperture portion is set to be equal to or higher than a quarter wavelength of the minimum operating frequency of the antenna apparatus.