摘要:
To make it possible to suppress degradation in characteristics by electromagnetic coupling between plurality of antennas and to cope with miniaturization of a housing even if a plurality of radio circuits operate simultaneously. In a mobile radio apparatus in which a circuit board 102, a first antenna 111 and a second antenna 112 are mounted in a housing 101, a first radio section 121 and a second radio section 122 are mounted in the circuit board 102 and the first radio section 121 and the second radio section 122 can operate simultaneously, a reactance element 131 for influencing an operating frequency of the first radio section 121 or the second radio section 122 is disposed in at least one of the first antenna 111 and the second antenna 112 when an electric length of the circuit board 102 is configured to be shorter than one-fourth a wavelength of at least one of the operating frequencies of the first radio section 121 and the second radio section 122.
摘要:
An object of the present invention is to provide a portable radio apparatus that obtains a high antenna performance without limiting the degree of freedom in the exterior and design of a main body of portable radio apparatus. A portable radio apparatus (1) includes a radiation element (14) disposed on a side opposite to a rear part (10a) of a housing (10) through a circuit board (11), and a plate conductor (16) disposed substantially in parallel to the circuit board (11) between the circuit board (11) and the rear part (10a) of the housing (10). With the provision of the radiation element (14) and the plate conductor (16), when the portable radio apparatus (1) is put on a metal plate (300), the radiation element (14) operates as a vertical passive element having an electrical length of λ/2 with the help of an image current caused by the metal plate (300), and also the plate conductor (16) operates as a counterpoise of the radiation element (14), to thereby obtain a higher antenna performance on the metal plate (300). Also, since no rib for separating the antenna element (13) of the portable radio apparatus (1) from the metal plate is required, the degree of freedom in the exterior and design of the portable radio apparatus (1) main body is not limited.
摘要:
An object of the invention is to provide a portable wireless device that can attain a high level of antenna performance when a plurality of antenna elements is present, and for which a housing can be made thinner. Among paths between a first power supply unit 13 and a second power supply unit 14 provided at edges of a notched part 17 of a circuit board, a ground pattern of a path with a short electrical length relative to a wavelength of an operating frequency of a first wireless unit 15 or an operating frequency of a second wireless unit 16 is split to give an electrically unconnected state. In this way, ground current caused by one of the antenna elements (for example, second antenna element 12) will not flow to or will be reduced in the other antenna element (for example, first antenna element 11), so that deterioration in the characteristics of the other antenna element can be kept low.
摘要:
An electrochromic dimming device is provided. The electrochromic dimming device includes an electrochromic element, a color development power source, a color discharge powder source, and a variable resistance. The color development power source supplies electric power to the electrochromic element when the electrochromic element develops color. The color discharge powder source supplies electric power to the electrochromic element when the electrochromic element discharges color. The variable resistance is disposed on a first current path without being disposed on a second current path. The first current path is formed from the color development power source through a ground via the electrochromic element, and the second current path is formed from the color discharge power source to the ground via the electrochromic element.
摘要:
An apparatus divides a photographed image of a sheet-like inspection object into blocks each of which has a size of a predetermined number of pixels by a predetermined number of pixels, calculates a longitudinal variance based on pixel values in a longitudinal direction in each block and a lateral variance based on pixel values in a lateral direction in the block, determines whether the block is a defect candidate using the longitudinal variance and the lateral variance as sheet-like inspection object defect determination evaluation values, and determines, based on one of a length and an area of the blocks determined as the defect candidates, whether the sheet-like inspection object has defect.
摘要:
An electrochromic dimming device is provided. The electrochromic dimming device includes an electrochromic element, a color development power source, a color discharge powder source, and a variable resistance. The color development power source supplies electric power to the electrochromic element when the electrochromic element develops color. The color discharge powder source supplies electric power to the electrochromic element when the electrochromic element discharges color. The variable resistance is disposed on a first current path without being disposed on a second current path. The first current path is formed from the color development power source through a ground via the electrochromic element, and the second current path is formed from the color discharge power source to the ground via the electrochromic element.
摘要:
A disc inspecting method includes: forming recording marks on a disc; scanning the recording marks from inside to outside or from outside to inside of the disc by a pickup unit to read a reproduction signal while rotating a spindle to move a slider by each predetermined width; acquiring reproduction data from the reproduction signal in a signal acquiring unit; and determining whether or not the reproduction data is proper in a calculation unit, and optimizing a formation condition of the recording marks when it is determined that the reproduction data is not proper.
摘要:
The tip end of the bonding tip is defined between first and second edges. A first inclined surface gets remoter from a first terminal at a position remoter from the first edge. The second inclined surface likewise gets remoter from the first terminal at a position remoter from the second edge. The solder is contoured by first and second contours on the first terminal. The second terminal is located on the solder between the first and second contours. The tip end of the bonding tip is urged against the second terminal. Heat is transferred from the bonding tip to the solder. The melted solder spreads into gaps between the second terminal and the first and second inclined surfaces. The solder is thus prevented from spreading outside the contour of the first terminal. This results in a reliable avoidance of a short circuit between the adjacent first terminals.
摘要:
An element made by papermaking for use in the production of a casting cast which comprises an organic fiber, an inorganic fiber, and a binder. The contents of the organic fiber, the inorganic fiber, and the binder are preferably 10 to 70 parts by weight, 1 to 80 parts by weight, and 10 to 85 parts by weight, respectively. The binder is preferably an organic binder. The organic fiber is preferably pulp fiber.
摘要:
An X-ray detection device for detecting whether or not foreign matter is mixed in on the basis of the transmission amount of X-rays that have penetrated an examination subject article by applying X-rays, at a predetermined detection position to an examination subject article being conveyed in a pipe (7), wherein a test-piece table (17) capable of passing by the detection position at substantially the same speed as that of the examination subject article is installed in the vicinity of the pipe (7), with a test-piece (21) placed thereon. X-ray detection sensitivity can be detected without mixing the test-piece in the actual examination subject article.