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:
Mar. 25, 2008
Filed:
Aug. 02, 2006
Hiromichi Suzuki, Hamura, JP;
Isao Ohba, Hachioji, JP;
Takayuki Shibuya, Sagamihara, JP;
Yusuke Okada, Hachioji, JP;
Kenji Matsuzaki, Akiruno, JP;
Hiromichi Suzuki, Hamura, JP;
Isao Ohba, Hachioji, JP;
Takayuki Shibuya, Sagamihara, JP;
Yusuke Okada, Hachioji, JP;
Kenji Matsuzaki, Akiruno, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An antenna device which is connected to a radio module performing radio communications with a system using a first band and a system using a second band, has an antenna element which transmits/receives radio signals in the first and second bands. The antenna device has first and second matching circuits corresponding to the first and second bands, and also disposes a switching circuit between the first and second bands and the radio module. A first filter circuit is connected between the first matching circuit and the antenna element. The first filter circuit passes the radio signal in the first band and also attenuates the radio signal in the second band. Meanwhile, a second filter circuit is connected between the second matching circuit and the antenna element. The second filter circuit passes the radio signal in the second band and also attenuates the radio signal in the first band.