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:
Jun. 02, 2009
Filed:
Feb. 11, 2008
Motofumi Yamaguchi, Osaka, JP;
Eiji Suematsu, Nara, JP;
Haruo Suzuki, Utsunomiya, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An antenna of the present invention includes a coaxial cable, antenna elements (and), and an unbalanced/balanced converter. The unbalanced/balanced converter has a high-pass circuit provided between an input terminal portand an output terminal portand a low-pass circuit provided between the input terminal portand an output terminal port. Moreover, the high-pass circuit rejects frequencies within a VHF band, and the high-pass circuit and the low-pass circuit both pass frequencies within a UHF band. In response to a signal, inputted to the input terminal port, which falls within the UHF band, the high-pass circuit and the low-pass circuit output signals that are inverted in phase and equal in amplitude with respect to each other. Therefore, the antenna has high transmission and reception sensitivity in a wide frequency range, i.e., in the VHF and UHF bands. This makes it possible to provide an antenna having high transmission and reception sensitivity in a wide frequency range.