Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Yasunori Komukai

Kenji Nishikawa

Shingo Sumi

Yukinari Takahashi

Yu Ono

Toshiharu Ishimura

Kenichi Sato

Noriyoshi Satoh

Hiroaki Kobayashi

Shinichi Okada

Hironori Kikuchi

Yasumichi Takai

Yoshinori Hiramatsu

Masahiro Nagata

Satoshi Kaga

Toshihiro Nagayama

Yuta Suzuki

A transmission system includes: an antenna; a control device including an RF circuit which transmits a first signal for controlling a radio wave to be outputted from the antenna and an external power supply which supplies direct current to the antenna; and a first transmission path which connects the antenna and the control device, and is used in transmission of the first signal and supplying of the direct current to the antenna.

Transmission system, antenna, control device, and transmission method

An antenna unit includes a plate-shaped dielectric substrate, as well as an antenna element and a stub element. The dielectric substrate has a first edge extending along a longitudinal direction of the dielectric substrate and a second edge extending along the longitudinal direction of the dielectric substrate, and the second edge is opposite to the first edge. The antenna element is disposed along the longitudinal direction of the dielectric substrate. The Antenna element has a first end containing a feedpoint and a second end containing an open end. The stub element is disposed between a section of the antenna element having a predetermined length containing the first end of the antenna element and the first edge of the dielectric substrate along the longitudinal direction of the dielectric substrate. The stub element has a first end connected to a reference potential and a second end containing an open end.

Antenna unit and electronic device

An antenna unit includes a conductive ground plate, a first antenna element, and a second antenna element. The first antenna element includes a first end connected to a feedpoint and a second end containing an open end. A part of the first antenna element is disposed along the conductive ground plate. The second antenna element branches off the first antenna element at a branch point on the first antenna element. The second antenna element is disposed between the part of the first antenna element disposed along the conductive ground plate and the conductive ground plate. The first antenna element resonates at a first frequency. The second antenna element and a segment between the first end and the branch point of the first antenna element resonate at a second frequency that is higher than the first frequency.

The invention aims at providing a communication terminal capable of suppressing degradation of an antenna gain irrespective of whether the casing of the communication terminal is opened or closed. The communication terminal includes a hinge for coupling in a foldable manner a first casing member and a second casing member, each including conductors such as a first printed board and a second printed board. In close proximity to the hinge in the second casing member is provides a second antenna. The hinge includes a first rotation axis composed of a conductive metal material working as an axis of rotation of two casing members in opposite directions and a second rotation axis composed of a conductive metal material working as an axis of rotation in a direction orthogonal to the direction of rotation about the first rotation axis. A predetermined clearance L to place the conductors of the first and second casing members in capacity coupling is formed and the hinge is insulated from the conductor of one of the two casing members.

Communication terminal

It is an object of the present invention to provide a communication terminal that can suppress the deterioration of a gain of an antenna either in an opening state or in a closing state. The communication terminal includes a hinge part for connecting a first casing member () to a second casing member () so as to freely open and close, a second antenna () provided near the hinge part in the second casing member () and a flexible base for connecting together first and second printed circuit boards () and () respectively provided in the first and second casing members () and (). The hinge part includes a first rotating shaft serving as an axis when the two casing members () and () rotate in opposed directions and a second rotating shaft serving as an axis upon rotating in a direction perpendicular to the rotating direction by the first rotating shaft. The flexible base is disposed in one end side of the first rotating shaft and a feeding part () of the second antenna () is disposed in the other end side of the first rotating shaft.

Growing community of inventors

Miyagi, Japan

Yasunori Komukai