Abstract:
A small-sized planar antenna attached to a portable radio device is only for a narrow band. Therefore, the resonance frequency of the antenna is fluctuated by the interaction between the antenna and a peripheral dielectric, such as the enclosure, the body of the user, etc., and the transmission efficiency and reception sensitivity of the antenna are low. In order to solve such a problem, a communicating section (composed of a coaxial line or microstrip line) is provided in the portable radio device and a circularly polarized wave antenna for satellite communication is attached to the communication section so as to ensure the distances between the enclosure and antenna and between the body of the user and the antenna.
Abstract:
A composite antenna with which stable communication with communication satellites flying in any direction in the sky is possible. A microstrip planar antenna and a helical antenna are arranged substantially coaxially, and the ground conductor of the planar antenna is connected to the helical antenna.
Abstract:
A carrier for electrophotography, having a magnetic carrier core, and a polyethylene resin covering the surface of this carrier core, characterized in that a resin layer of 0.01-2 mu m in thickness having a charge controlling ability or a particle layer of 0.01-2 mu m in thickness having a charge controlling ability is formed on the surface of the carrier core-covering polyethylene resin. A developer using such a carrier is also disclosed. The carrier and the developer enable charge polarity control and amount-of-charge adjustment while maintaining the excellent characteristics of the polyolefin resin-covered carrier.
Abstract:
A carrier for electrophotography making the most of excellent characteristics of a carrier having a polyolefinic resin coating, being freely adjustable of its charge quantity and its static resistance, being also obtainable of an image having a stable density and being able to effectively prevent external additives from being spent due to adhesion of the external additives, and a developer for electrophotography using this carrier. In a carrier for electrophotography including a carrier core material having magnetism and a coating layer consisting of a high molecular weight polyethylene resin covering the surface of the carrier core material, the coating layer consisting of the high molecular weight polyethylene resin includes, at least as the outermost layer, a layer containing magnetic powder the cubic shape of which is a convexed polyheral body encompassed by at least six flat and/or curved surfaces, or a layer containing this magnetic powder, silica and/or a fine particle resin.
Abstract:
A system intended to eliminate erroneous operations of the vibrator, a drawback of mobile terminals of the conventional independent vibrator method. The system comprises communication mobile terminals capable of communicating with other terminals through radio communication while they are moving; and peripheral devices designed to perform predetermined operations through radio communication between the mobile terminals and the peripheral devices. For radio communication between the mobile terminals and the peripheral devices, the apparatus employs time division multiplexing that exchanges signals by carrying data in time slots. In the time division multiplex, the mobile terminals use time slots of time bands other than those that the mobile terminals use for sending radio signals to base stations to send radio signals to the peripheral devices. This allows the mobile terminals to send radio signals to the peripheral devices without being interfered with by the radio signals transmitted by the mobile terminals to the base stations.
Abstract:
A piezoelectric sounding device is provided with a piezoelectric element comprising a metal vibration plate and a piezoelectromagnetic plate bonded thereto, a resistor connected in series with the both ends of the piezoelectric element, a coil for generating a leakage flux connected in parallel with the piezoelectric element and the resistor, and a resin case. The resin case has a part containing the piezoelectric element, a part containing electronic components and a coil winding part on which the coil for generating the leakage flux is wound. A portion of connector is embedded and fixed in the case. The piezoelectric sounding device is manufactured by a manufacturing process in which a resistor is joined to the connector by soldering, the resin case is formed so setting the connector in a mold of resin insertion as to embed the portion of the connector to which the resistor is connected, the piezoelectric element and the coil are mounted on the resin case. The thus obtained piezoelectric sounding device is so disposed, in a handset formed with sound emitting holes in which a supporting frame body is provided, as to form a cavity together with the piezoelectric element.
Abstract:
An oxide superconductor having the characteristics of two superconductors, i.e. a high critical temperature of RBa2Cu307 (wherein R represents at least one element selected from the group consisting of yttrium and lanthanide series elements) and a high-temperature stability of RBa2Cu4O8, which comprises RBa2Cu4O8 wherein 0.1 to 50 atomic % of R is replaced by calcium. It can be produced by various processes, among which the hot isostatic process for sintering the powdery starting materials is particularly effective. Although the Tc can be raised merely by applying this process, a more efficient production becomes possible by preventing the formation of (R1-xCax)Ba2Cu4O7 as an intermediate. The obtained superconductor can be applied in the production of wire material by virtue of the high critical temperature and high-temperature stability thereof.
Abstract translation:具有两个超导体特性的氧化物超导体,即RBa2Cu307的高临界温度(其中R表示选自钇和镧系元素的至少一种元素)和RBa 2 Cu 4 O 8的高温稳定性,其包含RBa 2 Cu 4 O 8,其中 0.1〜50原子%的R被钙取代。 它可以通过各种方法生产,其中用于烧结粉末起始材料的热等静压方法是特别有效的。 虽然仅通过应用该方法可以提高Tc,但是通过防止形成(R1-xCax)Ba2Cu4O7作为中间体,可以实现更有效的生产。 获得的超导体可以通过高临界温度和高温稳定性应用于线材生产中。
Abstract:
A fuel cell module (200) includes: in a casing, a fuel cell stack (20) that is formed by stacking a plurality of unit cells (10); and an oxidant gas distributing member that is disposed at a side surface, that extends in a stack direction, of the fuel cell stack, that extends in a direction from one end to another end of each of the unit cells, and that supplies the oxidant gas along the oxidant gas distributing member from the one end to the another end to supply the oxidant gas to the another end of each unit cell. The oxidant gas distributing member includes a heat exchange restraint portion that restrains heat exchange between the unit cells and the oxidant gas in at least one of end portions of the fuel cell stack in the stack direction, in comparison with the heat exchange thereof in other portion in the fuel cell stack.
Abstract:
In order to reduce the size of a microstrip line (1) and to improve the Q-value, the length and width of the microstrip line (1) in the oscillator are greatly decreased. Further, the resonance frequency which would be increased by the reduction in the size of the microstrip line (1) is not increased by virtue of the addition of a capacitance (Cx) connected to one end of the microstrip line (1) to become close to the oscillation frequency of the oscillator. This small sized microstrip (1) renders the size of the oscillation circuit small and gives the characteristics which are equal to those of a dielectric coaxial resonance element.