摘要:
According to one embodiment, a wireless device includes a board, a semiconductor chip, a radiation element, a sealing resin, a conductive layer, and a first conductive wall. The semiconductor chip is mounted on the board and includes a transmission/reception circuit. The radiation element is formed on the board. The sealing resin seals the semiconductor chip. The conductive layer covers at least a portion of a surface of the sealing resin. The first conductive wall is provided between the semiconductor chip and the radiation element and is connected to the conductive layer.
摘要:
According to the embodiments, a semiconductor package includes a semiconductor chip, a first conductive layer, a second conductive layer, and a power feeder. The semiconductor chip is provided on a substrate, is sealed with a resin, and contains a transmission/reception circuit. The first conductive layer is grounded and covers a first region on a surface of the resin. The second conductive layer is not grounded and covers a second region on the surface of the resin other than the first region. A power feeder electrically connects the semiconductor chip to the second conductive layer.
摘要:
A transformer between waveguide and transmission-line includes a high-frequency circuit module, transmission-lines, a waveguide, and feed pins. The high-frequency circuit module has differential-pair terminals to input and output a differential signal. The transmission-lines are connected to the differential-pair terminals. The waveguide includes a first to third metal walls. The feed pins are connected to the transmission-lines inside of the waveguide. The feed pins have a first distance of approximately (λg/2) from each other. One of the feed pins has a second distance of approximately (λg*(1+2 α)/4) from the third metal plane. “λg” is a wavelength in the waveguide and “α” is an integer which is equal or larger than “0”. Each of the feed pins has a third distance of approximately (a/2) from the first or second wall. “a” is length of the waveguide along the third metal wall.
摘要:
A wireless communication device has a plurality of wireless units each configured to cover a different wireless communication range and be capable of receiving data in the corresponding wireless communication range, a status information generator provided corresponding to the wireless unit utilized to receive data among the plurality of wireless units, in order to generate status information concerning the wireless communication range of the wireless unit utilized to receive the data, and a storage configured to store the status information in association with the data.
摘要:
A wireless communication device has a first wireless communication unit configured to wirelessly communicate with an external network, a management information storage configured to store application management information received through the first wireless communication unit, a second wireless communication unit configured to wirelessly communicate with an external communication device, and a management unit configured to control, based on the application management information stored in the management information storage, information wirelessly transmitted and received between the second wireless communication unit and the external communication device.
摘要:
A radio apparatus according to one aspect of the embodiments includes a substrate configured to have a high-frequency circuit formed thereon. The high-frequency circuit includes an electromagnetic wave radiation source to radiate an electromagnetic wave. The radio apparatus also includes a shielding case configured to house the substrate and have a plurality of openings each having a length of half a wavelength of the electromagnetic wave in a direction orthogonal to a polarization of the electromagnetic wave. Each of the openings is provided to make each distance between centers of the openings to be shorter than one wavelength of the electromagnetic wave.
摘要:
An antenna device includes a ground plane, an antenna element, and a metal wall. The antenna element is having a distance of (m×λ/2-λ/4) away from the ground plane, where “m” is an integer which is equal or larger than “1” and “λ” is a wave length of operating frequency. The metal wall is surrounding the antenna element. One end of the metal wall is attached to along the ground plane. The other end of the metal wall is forming an aperture with a height from the ground plane. The height of the metal wall is (n×λ/2), where “n” is an integer which is equal or larger than “m”.
摘要:
A foldable mobile terminal comprises a pair of housings which are coupled through a hinge to make the terminal foldable, at least one antenna arranged on each of the housings, a switch connected to the antenna, at least one radio unit mounted on one of the housing and connected selectively to the antenna through the switch, and a selector to select a diversity transceiving system according to folding-out or folding-in of the terminal.
摘要:
A fitting member positioning device, that can be reliably fixed in a predetermined position relative to an installation portion, includes a first element having an insert portion received in an insertion hole, the insert portion having a first thread portion, and a second element rotatable relative to the first element and axially movable, having a second thread portion received in the first thread portion. The insert portion includes an integral annular dilating portion, while the second element includes an advancing portion for advancing into and integrally dilating the dilating portion in the circumferential direction when the second element is axially moved with rotation by the first and second thread portions being threaded together, to press the first element against an inner circumferential surface of an insertion hole to prevent movement of the first element.