Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Takahiro Ochi

Haruhiko Kakitsu

Hiroaki Kobayashi

Kouta Aoki

Shigeaki Sakurazawa

Hideo Nakanishi

Kenji Nishikawa

Shingo Sumi

Kazuya Tani

Masashi Koshi

Yoshihiro Kanasaki

An antenna device is disposed on a first, a second, and a third surfaces, and includes a first antenna disposed on the first and the third surfaces, a second antenna disposed on the second surface, and a ground line disposed on the first surface. The first antenna includes a first feedpoint disposed on the first surface, a first element disposed on the first surface, and extending from the first feedpoint to the third surface, and a second element disposed on the third surface, and extending in a direction along the first surface from an end of the first element. The second antenna includes a second feedpoint disposed in a manner separated from the first feedpoint in a direction parallel with the first and the second surfaces, and an antenna element extending from the second feedpoint. The ground line includes a ground line element capacitively coupled to the first antenna.

Antenna device

A multiband compatible antenna that resonates at a first frequency and a second frequency includes: a planar conductor including a feeding portion to which a signal is supplied, a grounding portion, and a slit between the feeding portion and grounding portion. The slit includes a first slit portion extending in a first direction and a second slit portion extending in a second direction intersecting the first direction from an end of the first slit portion. The first slit portion is disposed closer to one edge than a center of the planar conductor in the second direction, and the feeding portion is disposed to a side of the first slit portion closer to the one edge. The planar conductor includes a first element portion and a second frequency portion that resonate at the first frequency and the second frequency, respectively. The second slit portion is disposed in the first element portion.

Multiband compatible antenna and radio communication device

A portable wireless device having a plurality of wireless sections capable of diversity operation which can reduce the size, thickness, weight and manufacturing cost by reducing the number of antennas. The portable wireless device () comprises first through third main antenna devices (-), first through third wireless sections (-) connected, respectively, with the first through third main antenna devices (-) and capable of diversity operation, a sub-antenna device () for diversity operation connected with any one of the first through third wireless sections (-) at the time of diversity operation, and a section () for switching connection of the sub-antenna device () with any one of the first through third wireless sections (-) at the time of diversity operation.

Portable wireless device

A portable radio device of a type having two-direction openable and closable enclosures that can effectively lessen influence on an antenna exerted by a hinge section is provided. A horizontal hinge sectionfor rotatably joining an upper enclosureto a hinge enclosurearound a first shaft center includes a horizontal hinge anchorelectrically connected to a first metal partdisposed in the upper enclosure, a horizontal hinge platethat is placed in the hinge enclosureand that contains a conductive material, and a first hinge shaftthat electrically connects the horizontal hinge anchorto the horizontal hinge plateand that contains a conductive material interposed between an area from a substantial center to an end of a long side of a face along which the upper enclosureand the hinge enclosureface a direction of second shaft center (X). An electrical path length of the lateral hinge sectionincluding the lateral hinge plateand the first hinge shaftcorresponds to a predetermined value that is not a substantially constant multiple of &#x3bb;/8.

Portable radio device

A mobile radio apparatus wherein the degradation of communication performance caused by electromagnetic noise can be precluded with enhanced reliability. This mobile telephone unit () comprises a camera body (); a circuit board () that includes partial board parts () located on the two respective sides of the camera body (); a camera shield () that is located close to and opposed to the back surface of the camera body () (which is opposite to the image pickup plane); a camera connection connector () that is connected to the camera body () and grounded in the partial board part (); a frequency limiting part () that is connected to the camera shield () and grounded in the partial board part (); a feeding part () that is located in the partial board part (); and a matching circuit part () that is located and grounded in the partial board part (). This can limit those ones of the frequencies of interference components dissipated from the camera body () to the circuit board () which adversely affect the communication, so that the degradation of communication performance caused by electromagnetic noise can be precluded with enhanced reliability.

Mobile radio apparatus

A portable wireless device has no externally projecting part even when a card type functional medium has been therein inserted, and allows downsizing and obtaining high antenna performance. The portable wireless device includes a card slot () in a substrate () of a lower housing (), and includes a slot cover () that can block an opening portion of the card slot (). The slot cover () is integrally provided with a parasitic element (). The parasitic element () is, when an SDIO card () is inserted, arranged so as to be in proximity substantially parallel with the antenna element () of the SDIO card (), has an electrical length which is approximately one-half wavelength of a driving frequency of an RF circuit () of the SDIO card (), and electromagnetically couples with the antenna element () to operate as a parasitic element.

The present invention has an object to provide a portable terminal apparatus capable of reducing that antenna characteristics of respective antenna elements are deteriorated due to antenna coupling phenomena even when a plurality of wireless communication functions are carried out at the same time by utilizing a plurality of antennas. The portable terminal apparatusof the present invention is comprised of: a first wireless unitfor performing a wireless communication by utilizing electromagnetic waves of a first frequency range; a second wireless unitfor performing a wireless communication by utilizing electromagnetic waves of a second frequency range which is different from the first frequency range; a first antenna elementconnected to the first wireless unit; and a second antenna elementconnected to the second wireless unit; and in the portable terminal apparatus, an impedance characteristic of the first antenna elementhas a first frequency characteristic in which at least a characteristic in the first frequency range is superior than a characteristic in the second frequency range; and an impedance characteristic of the second antenna elementhas a second frequency characteristic in which at least a characteristic in the second frequency range is superior than a characteristic in the first frequency range.

Growing community of inventors

Sendai, Japan

Takahiro Ochi