Abstract: In an AC power supply apparatus, first and second switching circuits connected in series to an input terminal to which a DC input power supply is connected include first and second rectification elements, respectively. A capacitor, an inductor, and a capacitive load are equivalently connected in series to the second switching circuit. The capacitor is charged after the first switching circuit is turned on before the second rectification element is turned off and the charged capacitor is caused to discharge after the second switching circuit is turned on before the second rectification element is turned off. The above operations are periodically repeated. The voltage of the capacitive load is reversed with current flowing during the charge and the discharge of the capacitor to adjust the on and off periods of the first and second switching circuits in order to supply desired AC voltage to the capacitive load.

Abstract: A wireless communication device includes a flexible base material film, a flexible antenna conductor that is provided in substantially the entire region of one main surface of the flexible base material film and that includes a first radiation element and a second radiation element facing each other through a slit, an inductor substrate that is connected to the first radiation element and the second radiation element so as to extend across the slit, the inductor substrate including an inductance element, and a wireless IC element that is connected in parallel to the inductance element and that is mounted in the inductor substrate. The wireless IC element is connected to the first radiation element and the second radiation element so as to extend across the slit.

Abstract: A compact high-frequency module that increases isolation between a transmission-side circuit and a reception-side circuit of a duplexer includes a switch element and duplexers. The duplexers include transmission-side SAW filters and reception-side SAW filters. The transmission-side SAW filters are mounted near one edge of a multilayer body. The reception-side SAW filters are mounted near another edge opposite to the one edge of the multilayer body.

Abstract: A small high-frequency module has a structure such that a high-power signal is prevented from leaking to a switch device. On the top surface of a multilayer body, a switch device and a duplexer are mounted so as to be spaced apart from each other by a predetermined distance. An inductor and resistors connected to a circuit different from a transmission system circuit are mounted between the switch device and the duplexer. The inductor and the resistors are mounted such that external connection terminals connected to the switch device are on the switch device side and external connection terminals connected to external connection power system port electrodes of the high-frequency module are on the duplexer side.

Abstract: In a fluid control device, a check valve includes a first valve housing and a first diaphragm. The first diaphragm defines a first valve chamber and a second valve chamber. An exhaust valve includes a second valve housing and a second diaphragm. The second diaphragm defines a third valve chamber and a fourth valve chamber. The check valve is opened and closed by a difference in pressure between the first valve chamber and the second valve chamber. The exhaust valve is opened and closed by a difference in pressure between the third valve chamber and the fourth valve chamber.

Abstract: Provided is a flat Ni particle which has a large specific surface area, permitting efficient binder removal when the flat Ni particle is used for internal electrodes of a laminated ceramic electronic component. The flat Ni particle has a thickness t (m), a specific gravity ? (g/m3), and a radius r (m), and a specific surface area S1 (m2/g), such that the specific surface area S1 is adapted to have a relationship of 1.5×S0<S1<1.9×S0 with a theoretical specific surface area in the case of assuming a surface to be completely smooth, represented by S0=2/(?×t)+2?2/(?×r)(m2/g).

Abstract: An elastic wave filter that prevents damage caused by ESD is constructed such that a distance between an electrode finger or a dummy electrode of a first IDT electrode and an adjacent electrode finger or an adjacent dummy electrode of a fourth comb-shaped electrode, which is a floating electrode that is not connected to any of an input terminal, output terminals, and a ground terminal, is longer than a distance between the electrode finger or the dummy electrode of the first IDT electrode and an adjacent electrode finger or an adjacent dummy electrode of a third comb-shaped electrode, which is connected to the input terminal, the output terminal, or the ground terminal.

Abstract: An ESD protection device includes a semiconductor substrate including input/output electrodes and a rewiring layer located on the top surface of the semiconductor substrate. An ESD protection circuit is provided in the top layer of the semiconductor substrate, and the input/output electrodes are connected to the ESD protection circuit. The rewiring layer includes interlayer wiring lines, in-plane wiring lines, and post-shaped electrodes. First ends of the interlayer wiring lines provided in the thickness direction are connected to the input/output electrodes provided on the top surface of the semiconductor substrate and the second ends are connected to first ends of the in-plane wiring lines extending in the plane direction. The distance between the centers of the first and second post-shaped electrodes is larger than the distance between the centers of the first and second input/output electrodes.

Abstract: A forward check valve and a fuel cell system in which fluid control is performed with increased reliability when a highly active fluid is used are structured such that when an edge portion of a cap is joined to an edge portion of a valve housing, a peripheral edge portion of a diaphragm is pushed and sandwiched by a peripheral edge portion of the cap and a placement portion. Further, the diaphragm is formed of rubber. As a result, the peripheral edge portion of the diaphragm is compressed by the peripheral edge portion of the cap and the placement portion, so that the degree of contact at a contact portion between the placement portion and the peripheral edge portion of the diaphragm becomes very high. Consequently, in the forward check valve, joints of the members including a joint of the edge portion of the cap and the edge portion of the valve housing do not contact methanol.

Abstract: A monolithic ceramic electronic component includes at least two types of stacked ceramic layers having different dielectric constants and also includes internal electrodes partially disposed along boundaries between the ceramic layers having different dielectric constants. The internal electrodes include an additive component common to a component included in at least one of the ceramic layers adjacent to each other with the internal electrodes placed therebetween.

Abstract: A piezoelectric ceramic having excellent electrical characteristics, and in which all of three crystallographic axes are oriented is obtained by slip cast or sheet forming a ceramic slurry containing plate-shaped ceramic particles in magnetic field. The degree of orientation of a first axis (for example, a c axis) calculated with the Lotgering method based on an X-ray diffraction (XRD) pattern in a prescribed cross-section of this piezoelectric ceramic is not less than 0.30. With a cross-section where the degree of orientation of the first axis indicates a maximum value being defined as a reference plane, the degree of orientation of a second axis (for example, an a axis) calculated with the Lotgering method based on an X-ray diffraction pattern in a cross-section orthogonal to this reference plane is not less than 0.20.

Abstract: An ultraviolet sensor that includes a p-type semiconductor layer principally composed of (Ni, Zn)O, an n-type semiconductor layer composed of ZnO which is joined to the p-type semiconductor layer, an internal electrode embedded in the p-type semiconductor layer, and first and second terminal electrodes formed at both ends of the p-type semiconductor layer. The surface roughness of the p-type semiconductor layer is 1.5 ?m or less, and preferably 0.3 ?m or more and 1.0 ?m or less. In a manufacturing process, the formed product prior to firing and/or the p-type semiconductor layer after firing is polished by barrel polishing so that the surface roughness Ra thereof is 1.0 ?m or less. Thereby, light absorption efficiency can be improved to directly detect a desired large photocurrent and secure high reliability, and a spectral property can be controlled to strongly respond to various wavelength bands of ultraviolet light.

Abstract: An antenna unit and a radio communication device are provided. An antenna unit has a monopole antenna section and a loop antenna section. The monopole antenna section includes a linear radiating electrode that resonates at a first frequency and has an electrical length of one-quarter of the wave length corresponding to the first frequency. The loop antenna section includes a radiating electrode that resonates at a second frequency, is vertically erected on a non-ground region, and connected to a feed line. A proximal end of the radiating electrode of the loop antenna section is connected to an intermediate portion of the feed line, and a distal end thereof is connected to a ground region. The electrical length of the radiating electrode of the loop antenna section is one-half of the wave length of the second frequency.

Abstract: An ESD protection device includes an alumina multilayer substrate, a hollow portion, a discharge electrode pair, discharge-assisting electrodes, and a vitreous substance. The hollow portion is disposed inside of the alumina multilayer substrate. The electrodes of the discharge electrode pair are disposed opposite to each other at an interface between the hollow portion and the alumina multilayer substrate. The discharge-assisting electrodes are disposed dispersedly between the opposite electrodes of the discharge electrode pair. The vitreous substance covers the discharge-assisting electrodes in the inside of the hollow portion. A trial discharge is executed so as to induce creepage discharge between the electrodes of the discharge electrode pair in advance.

Abstract: Provided is a laminated ceramic capacitor which can suppress degradation of the insulation resistance due to the addition of vanadium. Second insulating layers are stacked on both sides in the stacking direction of a first insulating layer group, which has first insulating layers stacked over one another, and internal electrodes are placed on principal surfaces of the first insulating layers. At least one internal electrode is placed between the first and second insulating layers. Both contain, as their main constituent, a perovskite-type compound represented by the formula “ABO3” wherein “A” denotes at least one of Ba, Sr, and Ca, “B” denotes at least one of Ti, Zr, and Hf. V is added to only the first insulating layers.

Abstract: A mixed aqueous solution is prepared in which a phosphorus source, a divalent Fe compound, and an oxidant are mixed at a predetermined ratio. Then, this mixed aqueous solution is dropwise added into a buffer solution having a pH value of 1.5 to 9, thereby to produce a precipitated powder of FePO4. This FePO4 is synthesized with a lithium compound to obtain LiFePO4. An electrode active substance containing this LiFePO4 as a major component is used as a positive electrode material of a secondary battery.

Abstract: An elastic wave surface acoustic wave duplexer includes an antenna terminal, a transmission filter, a reception filter, and a plurality of elastic wave resonators connected in series between the antenna terminal and the reception filter. The reception filter is a longitudinally coupled resonator-type surface acoustic wave filter including a plurality of IDT electrodes and arranged along a propagation direction of elastic wave. A combined capacitance of the plurality of surface acoustic wave resonators is smaller than a capacitance of the IDT electrodes and included in the plurality of IDT electrodes and connected to the antenna terminal.

Abstract: A capacitor of a certain LC resonator, among multiple LC resonators in a band-pass filter, is arranged at a side of one main surface in a stacking direction of a multilayer body of the band-pass filter and the capacitors of the remaining LC resonators are arranged at a side of the other main surface in the stacking direction of the multilayer body. One of a pair of capacitor electrodes of the capacitor of the certain LC resonator is grounded. The one capacitor electrode that is grounded covers at least the plurality of LC resonators, as viewed from the stacking direction of the multilayer body.

Abstract: In a high frequency transformer, when a current flows between input-output ports, a magnetic flux produced by first and third coil conductor patterns of a primary coil is interlinked with a second coil conductor pattern of a secondary coil. A magnetic flux produced by the second coil conductor pattern of the primary coil is interlinked with the first and third coil conductor patterns of the secondary coil. The coil conductor patterns are wound so that when a current flows through a transformer, the directions of magnetic fields occurring within the first and third coil conductor patterns of the primary coil and the second coil conductor pattern of the secondary coil are the same and the directions of magnetic fields occurring within the first and third coil conductor patterns of the secondary coil and the second coil conductor pattern of the primary coil are the same.

Abstract: An antenna device includes a feeding member including a coil pattern and an emitting member to emit a transmit signal supplied from the feeding member and to receive a receive signal and supplying it to the feeding member. The emitting member includes an opening portion and a slit portion communicating with the opening portion. When seen in plan view from the direction of the winding axis of the coil pattern, the opening portion of the emitting member and the inner region of the coil pattern overlap each other, and the emitting member and the coil pattern overlap each other at least partially.