Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Kengo Shiiba

Hiromi Sakita

Katsumi Sasaki

Kazuhide Goto

Makoto Yoshinomoto

Kenzo Isozaki

Mitsuo Kanmera

Masanobu Kuroki

Yoshio Onaka

Hiroshi Kawano

Takayuki Takeuchi

Munenori Fujimura

Shuichiro Yamaguchi

Yasuhiko Horio

Hiromi Tokunaga

Kouichi Watanabe

Yoshitaka Mizoguchi

Hidetsugu Fujimoto

Yoshihiko Takayama

Kouji Nishimura

Hatsuhiro Yano

Hitoshi Uchi

An antenna apparatus used in a wireless communication medium or a wireless communication medium processing apparatus constructed by a constitution of including a magnetic member in which a magnetic ceramic powder is used as a major component thereof and which is provided with flexibility; an antenna formed at a surface or inside of the magnetic member, and a matching circuit of the antenna formed at the surface or the inside of the magnetic member.

Antenna apparatus

A surface-mount type antenna and a communication terminal using the same. A radiator electrode is provided on a first principal face of a substrate. A ground electrode is provided on the second principal face of the substrate. A first feeder electrode has at least a portion thereof provided on a side face and on the second principal face of the substrate. A second feeder electrode is provided on an inner wall face of a hole formed parallel to the first and second principal faces. The first feeder electrode and the ground electrode are kept in a non-contact state. The first feeder electrode and the second feeder electrode are in electrical contact. A mobile communication terminal using the surface-mount type antenna is small in size, exhibits small variations in characteristics, and provides high productivity and reliability.

Surface-mount type antennas and mobile communication terminals using 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&#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 non-reciprocal circuit device has a length, a width, and a thickness denoted respectively by LLand Land the overall dimensions of 2.5 mm&#x3c;L&#x3c;7.0 mm, 2.5 mm&#x3c;L&#x3c;7.0 mm, and 1.0 mm&#x3c;L&#x3c;3.5 mm. When a projected area of the substrate of the device is orthogonally projected on a plane parallel to a base surface of the substrate is denoted by S, the substrate holds a proportional relation to S/(L&#xd7;L)=0.1 to 0.78. When a thickness of the magnet of the device is denoted by Lthe magnet holds a proportional relation of L/L=0.2 to 0.5. When a projected area of the magnet orthogonally formed on a plane parallel to a surface of the magnet is denoted by Sthey have a proportional relation of S/S=0.15 to 0.83.

Non-reciprocal circuit device, method of manufacturing, and mobile communication apparatus using the same

A surface mount type antenna and a communication terminal using the same. A radiator electrode is provided on a first principal face of a substrate. A ground electrode is provided on the second principal face of the substrate. A first feeder electrode has at least a portion thereof provided on a side face and on the second principal face of the substrate. A second feeder electrode is provided on an inner wall face of a hole formed parallel to the first and second principal faces. The first feeder electrode and the ground electrode are kept in a non-contact state. The first feeder electrode and the second feeder electrode are in electrical contact. A mobile communication terminal using the surface-mount type antenna is small in size, exhibits small variations in characteristics, and provides high productivity and reliability.

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.

Growing community of inventors

Miyazaki, Japan

Kengo Shiiba