Yokowo Co., Ltd.

Masayuki Goto

Hirotoshi Mizuno

Yusuke Yokota

Kazuhiro Kowaita

Kentaro Hayashi

In an antenna device, when an AM/FM antenna as a first antenna and an SDARS antenna or a GPS antenna as a second antenna that have different frequency bands are provided in a common case, an additional conductor portion extends out from a conductor main body portion of a capacitive element, and the additional conductor portion includes a parallel strip-shaped portion having a length that is &#xbc; of an effective wavelength in a frequency band of the second antenna, and extending parallel to the conductor main body portion.

Antenna device

A vehicular antenna device capable of preventing reception trouble in a radio, a TV receiver, or the like due to noise by suppressing electromagnetic noise radiated from an electronic device or the like is provided. A vehicular antenna device is equipped with an antenna basewhich is fixed to a vehicle body via an attaching member, an antenna case which covers the antenna base, and an antenna elementand a camera moduleas an electronic device which are disposed in an internal space surrounded by the antenna baseand the antenna case. A camera module casesurrounds a circuit boardof the camera moduleand thereby shields it.

Vehicular antenna device

An antenna device capable of suppressing influence on an antenna performance even if an electronic device is provided in its vicinity is provided. An antenna deviceis equipped with a top elementand a coil. A casingof a camerais disposed at such a position as not to be right under the top element. The coilis disposed close to the casingin a front-rear direction. A distance between the casingand the coilin the front-rear direction is longer than or equal to 0.00075 times a shortest wavelength of a reception target signal. A maximum antenna efficiency of the antenna devicein a predetermined frequency band is higher than or equal to 85% of a maximum antenna efficiency in a case where the camerais not provided.

Growing community of inventors

Tomioka, Japan

Masayuki Goto