Abstract: An accuracy of required position measurement can be ensured and an antenna can be miniaturized. An antenna which transmits a wireless signal for position measurement includes a board formed of a dielectric material, four radiation conductors formed in a 2×2 array on a first surface of the board, and a ground conductor formed on a second surface of the board, and the board and the ground conductor are formed so as not to protrude to the outside of the four radiation conductors.

Abstract: A mobile wireless device includes a first housing, a second housing, a first hinge configured to freely openably and closably connect the first housing with the second housing, a third housing, a second hinge configured to freely pivotally connect the second housing with the third housing, a first circuit board provided in the first housing, a second circuit board provided in the second housing, a signal cable configured to electrically connect the first circuit board with the second circuit board and adapted to be inserted into a cylindrical portion of the second hinge, and a conductive element provided in the second housing. An end of the conductive element is connected to the second hinge, and the cylindrical portion of the second hinge is capacitively coupled to the signal cable.

Abstract: A mobile wireless device includes a first housing, a second housing, a first hinge configured to freely openably and closably connect the first housing with the second housing, a first circuit board provided in the first housing, a second circuit board provided in the second housing, a signal cable configured to electrically connect the first circuit board with the second circuit board, a plate-shaped ground that is provided so as to be stacked on the second circuit board and has a notch at a location through which the signal cable is passed, and a conductive member that covers the signal cable and the notch.

Abstract: Disclosed is a mobile wireless device, which has an antenna structure for feeding a hinge core with an electric power and which can be adapted to wireless communications of low-frequency bands without enlarging a casing itself. In this wireless device, an upper casing (101) equipped with a first circuit substrate (111) and a lower casing (102) equipped with a second circuit substrate (112) having a wireless unit (118) mounted thereon are connected to open and close through a hinge unit having a conductive hinge (130). A feeding unit (113) mounted in the upper casing (101) feeds the conductive hinge (130) with an electric power from the first circuit substrate (111).

Abstract: There is provided a mobile wireless device capable of preventing antenna characteristics from degrading by feeding electric power at a position hardly affected by a human body such as a hand or other body part. In the mobile wireless device, a first circuit board (101) is provided on a first chassis (110) and has a ground layer; a second circuit board (105) is provided on a second chassis (120) and has a ground layer. A ground terminal of a wireless portion (104) is connected to the ground layer of the first circuit board (101) at the same voltage level and is also electrically connected through the wireless portion (104) to a matching circuit (103). The ground layer of the second circuit board (105) is electrically connected to a hinge conducting portion (106) by electrostatic capacitance coupling. The hinge conducting portion (106) is connected through a third conduction portion (107) to a board connection portion (102) and feeds power to the wireless portion through the matching circuit (103).

Abstract: A portable radio apparatus includes: a first circuit board disposed within a first housing; a second circuit board disposed within a second housing; a third housing disposed between the first housing and the second housing; a first hinge part rotatably coupling the first and third housings; an electrically conductive and hollow second hinge part rotatably coupling the second housing and the third housing; a connection cable inserted in the second hinge part and electrically connecting the first circuit board and the second circuit board; and an antenna element disposed within the third housing. The antenna element and the second hinge part are connected such that the second hinge part functions as a ground of the antenna element. The portable radio apparatus further includes an electrically conductive connection member electrically connecting the ground of the antenna element and a ground of the second circuit board.

Abstract: There is provided a mobile wireless device capable of preventing antenna characteristics from degrading by feeding electric power at a position hardly affected by a human body such as a hand or other body part. In the mobile wireless device, a first circuit board (101) is provided on a first chassis (110) and has a ground layer; a second circuit board (105) is provided on a second chassis (120) and has a ground layer. A ground terminal of a wireless portion (104) is connected to the ground layer of the first circuit board (101) at the same voltage level and is also electrically connected through the wireless portion (104) to a matching circuit (103). The ground layer of the second circuit board (105) is electrically connected to a hinge conducting portion (106) by electrostatic capacitance coupling. The hinge conducting portion (106) is connected through a third conduction portion (107) to a board connection portion (102) and feeds power to the wireless portion through the matching circuit (103).

Abstract: Provided is a radio communication device which can prevent degradation of an antenna by controlling the VSWR and the current phase of antennas arranged adjacent to one another. In this device, an antenna (201) has a predetermined resonance frequency. A breaking circuit (203) is connected to the antenna (201) in parallel to a rectification circuit (205) so as to shut off the resonance frequency of the antenna (201). A termination circuit (204) electrically terminates the output side of the breaking circuit (203). An antenna (207) is arranged in the vicinity of the antenna (201) and has a resonance frequency different from a resonance frequency of the antenna (201). A breaking circuit (209) is connected to the antenna (207) in parallel to a rectification circuit (211) and shuts off the resonance frequency of the antenna (207). A termination circuit (210) terminates the output side of the breaking circuit (209).

Abstract: Disclosed is a mobile wireless device, which has an antenna structure for feeding a hinge core with an electric power and which can be adapted to wireless communications of low-frequency bands without enlarging a casing itself. In this wireless device, an upper casing (101) equipped with a first circuit substrate (111) and a lower casing (102) equipped with a second circuit substrate (112) having a wireless unit (118) mounted thereon are connected to open and close through a hinge unit having a conductive hinge (130). A feeding unit (113) mounted in the upper casing (101) feeds the conductive hinge (130) with an electric power from the first circuit substrate (111).