Matsushita Electric Industrial Co., Ltd.

Masanobu Kuroki

Hiromi Sakita

Kenzo Isozaki

Mitsuo Kanmera

Katsumi Sasaki

Kengo Shiiba

Kazuhide Goto

Makoto Yoshinomoto

Kuniaki Kiyosue

Kazuhiro Takeda

A chip antenna that is simple in structure, produces small variation in antenna characteristics between individual antennas, and requires no circuit adjustments, is excellent in productivity. The chip antenna is capable of being mounted on a circuit board, as well as a wireless terminal using the chip antenna. A method of fabricating the chip antenna. A core body is made from an insulating material in a quadrangular or circular cylinder shape. A conductor in a helical shape is mounted on the side surface of the core body. A terminal portion is provided on the core body and electrically connected with an end portion of the conductor. The width, depth, and length of the core body are within ranges of 0.5-5 mm, 0.5-5 mm, and 4-40 mm, respectively. Intrinsic volume resistance and relative dielectric constant of the material are 10&#x3a9;&#xb7;m or above and 40 or below, respectively.

Chip antenna, radio communications terminal and radio communications system using the same and method for production of the same

A chip antenna that is simple in structure, produces small variation in antenna characteristics between individual antennas, and requires no circuit adjustments, is excellent in productivity. The chip antenna is capable of being mounted on a circuit board, as well as a wireless terminal using the chip antenna. A method of fabricating the chip antenna. A core body is made from an insulating material in a quadrangular or circular cylinder shape. A conductor in a helical shape is mounted on the side surface of the core body. A terminal portion is provided on the core body and electrically connected with an end portion of the conductor. The width, depth, and length of the core body are within ranges of 0.5-5 mm, 0.5-5 mm, and 4-40 mm, respectively. Intrinsic volume resistance and relative dielectric constant of the material are 10 &OHgr;&middot;m or above and 40 or below, respectively.

An inductance element providing a high Q factor even with a dawn-sized configuration comprises a column shape body ( ), a coil ( ) wound around the body ( ), a terminal electrode provided at both ends of the body ( ), connected with the coil ( ), and a protection material ( ) for covering the coil ( ), which has a relative dielectric constant not higher than 6.0.

Inductance element

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Saito, Japan

Masanobu Kuroki