Sharp Kabushiki Kaisha Corporation

Haruo Suzuki

Eiji Suematsu

Motofumi Yamaguchi

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.

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Utsunomiya, Japan

Haruo Suzuki