Abstract: An elastic wave device includes a piezoelectric substrate, an IDT electrode located on the piezoelectric substrate, and a capacitive electrode that is located on the piezoelectric substrate and is connected in series with the IDT electrode. The capacitive electrode includes a plurality of capacitive electrode portions, each of which includes a pair of mutually interdigitated comb-shaped electrodes. The plurality of capacitive electrode portions are connected with each other in parallel. The plurality of capacitive electrode portions are arranged such that an intersecting width direction D1 of the capacitive electrode portions is inclined with respect to an intersecting width direction D2 of the IDT electrode. The plurality of capacitive electrode portions are arrayed in an elastic-wave propagating direction D3 of the IDT electrode.

Abstract: In a multilayer ceramic electronic component, internal electrodes arranged inside a ceramic body include exposed ends that are connected to end surfaces of the ceramic body. External electrodes, which are arranged on the end surfaces so as to be electrically connected to the internal electrodes, include first conductive portions that are arranged on the end surfaces so as to cover the exposed ends but so as not to wrap around onto the side surfaces, and include second conductive portions that are arranged on the end surfaces so as to cover the first conductive portions and so as to wrap around onto the principal surfaces and the side surfaces. In each external electrode, protruding portions are arranged on the end surface adjacent to the first conductive portion to stabilize the posture of the ceramic body when the second conductive portions are being formed.

Abstract: A stripline filter that suppresses a fundamental wave frequency without increasing the size of a board and in which a harmonic frequency is easily set to a desired frequency. The stripline filter includes a glass layer having a relative dielectric constant lower than that of a dielectric board. A first top surface line is provided on a top surface of the dielectric board and has a resonant open end. A second top surface line and a side surface electrode are provided on the glass layer so as to extend from positions connected to the first top surface line.

Abstract: It is harder to realize structural defects when the thickness of an internal electrode is reduced in a laminated ceramic electronic component, such as a laminated ceramic capacitor, when the internal electrodes contain a base metal as their conductive constituent, and the dielectric ceramic layers are formed from a dielectric barium titanate ceramic, and as an accessory constituent, at least one alkali metal element selected from Li, K, and Na, each of the internal electrodes has a thickness of 0.5 ?m or less, and the content of the alkali metal element in the dielectric ceramic is 0.2 parts by mol or more with respect to 100 parts by mol of the main constituent.

Abstract: A laminated ceramic capacitor is provided which is excellent in reliability even when its dielectric ceramic layers thinned. For a dielectric ceramic in a laminated ceramic capacitor, a ceramic is used which includes a main component containing a barium titanate based composite oxide represented by the general formula: (Ba1-h-m-xCahSrmRex)k(Ti1-n-yZrnMy)O3, where Re is La or the like, M is Mg or the like, and the respective relationships of 0.05?x?0.50, 0.02?y?0.3, 0.85?k?1.05, 0?h?0.25, 0?m?0.50, and 0?n?0.40 are satisfied; and an accessory component as a sintering aid, wherein the average grain diameter of crystal grains in a sintered body is 0.6 ?m or less.

Abstract: An antenna coil includes a wound body including a magnetic core, a bobbin surrounding the magnetic core, and a coil wound around the bobbin, a case in which the wound body is placed, and a foam disposed in a gap between the wound body and the case. The foam is compressed at a rate of about 45% to about 65% on the basis of a thickness of the foam in a non-load state. The antenna coil prevents breakage of the magnetic core and is suitable for use in a short-distance communication system in an LF-band.

Abstract: A laminate in which plural insulator layers are stacked includes an external electrode that is exposed to the exterior of the laminate and includes a plurality of conductive layers stacked in a staking direction and passing through some of the plural insulator layers in the stacking direction. At least one side of the external electrode facing in the stacking direction is overlaid with rest of the plural insulator layers. At least one side surface of the external electrode facing in the stacking direction is uneven with another portion of the side surface.

Abstract: An elastic wave filter includes at least a piezoelectric substrate and a longitudinally coupled resonator-type elastic wave filter unit provided on the piezoelectric substrate. The longitudinally coupled resonator-type elastic wave filter unit includes first to fifth IDTs and first and second reflectors arranged on either side of the first to fifth IDTs. The third IDT includes first and second divided comb-shaped electrodes. The second and fourth IDTs are connected to an unbalanced signal terminal, the first IDT and the first divided comb-shaped electrode of the third IDT are connected to a first balanced signal terminal, and the fifth IDT and the second divided comb-shaped electrode of the third IDT are connected to a second balanced signal terminal. The first and fifth IDTs each have a constant electrode finger pitch, and the electrode finger pitch of the first IDT is less than that of the fifth IDT.

Abstract: An antenna device having a magnetic core to be surface-mounted on a circuit substrate includes a pair of coil portions spaced apart from each other at a predetermined interval. The coil portions are connected by a connecting conductor. An end of the magnetic core includes a curved or bent portion curved toward the circuit substrate. This structure defines an RFID antenna device having an improved receiving sensitivity that can be surface-mounted without increasing the thickness of a casing of a mobile electronic device.

Abstract: An ultrasonic transducer includes a case, a reflective portion, and a piezoelectric body. The case has a substantially cylindrical shape including one closed end in the center axis direction that defines a top. The piezoelectric body is disposed on the inner surface of the top of the case. The reflective portion is arranged to oppose and be spaced apart from the piezoelectric body. The distance between the piezoelectric body and the reflective portion is greater than the maximum displacement of the piezoelectric body and is substantially an odd number multiple of a ¼ wavelength of sound waves or less than or equal to the ¼ wavelength.

Abstract: A laminated electronic component includes a component body including a plurality of laminated functional layers, a plurality of internal conductors provided inside the component body, and an external terminal electrode that is electrically connected to an internal conductor via an exposed portion of the internal conductor and that is defined by a direct plating film. An average grain diameter of metal grains defining the plating film is about 0.1 ?m or less.

Abstract: A nonreciprocal circuit element includes first and second center electrodes. On a ferrite to which a direct-current magnetic field is applied from a permanent magnet, the first and second center electrodes are insulated and intersect. First and second ends of the first center electrode are connected to an input port and an output port, respectively. First and second ends of the second center electrode are connected to the output port and a ground port, respectively. A first matching capacitor and a resistor are connected between the input port and the output port. A second matching capacitor is connected between the output port and the ground port. A parallel resonant circuit is connected in parallel to the resistor. A coupling element is connected between the parallel resonant circuit and another parallel resonant circuit including the first center electrode and the first matching capacitor so as to the parallel resonant circuits.

Abstract: A method of measuring characteristics of a specimen, the measuring method including the steps of bonding the specimen to a host molecule on a sensing device, emitting an electromagnetic wave of a particular frequency to the sensing device to which the specimen is bonded, measuring a frequency characteristic of the transmitted or reflected light, and measuring the characteristics of the specimen based on a change of the frequency characteristic, wherein an absorbance of the host molecule per unit quantity at the particular frequency is smaller than that of the specimen.

Abstract: A low pass filter includes a laminate including a plurality of insulating layers stacked in a z-axis direction and a mounting surface on a negative side in the z-axis direction. An external electrode is disposed on a lower surface of the laminate and is grounded. The laminate houses a substantially spiral coil having a central axis extending in the z-axis direction. Via-hole conductors extend from the end on the positive side in the z-axis direction of the coil toward the negative side in the z-axis direction. The external electrode and the end on the positive side in the z-axis direction of the coil are electrically coupled to each other through the via-hole conductors.

Abstract: A thin circuit substrate and a circuit module are arranged such that the circuit module includes an IC mounted on a circuit substrate, the IC includes an IC body and an solder bump located on a mounting surface of the IC body, and the circuit substrate includes a substrate including a recess formed by recessing a portion of a mounting surface of the substrate on which the IC is to be mounted, and a terminal protruding from the mounting surface of the substrate. The terminal is to be electrically connected to the solder bump.

Abstract: A semiconductor ceramic includes a BamTiO3-based composition, as a main component, having a perovskite structure represented by general formula AmBO3, wherein part of Ba constituting the A site is replaced with Na, Bi, Ca, and a rare-earth element having an ionic radius smaller than that of the Na; the content of the rare-earth element when the total number of moles of the elements constituting the A site is 1 mole is 0.0005 to 0.015 on a molar basis; and the content of the Ca when the total number of moles of the elements constituting the A site is 1 mole is 0.05 to 0.20 (preferably 0.125 or more and 0.175 or less) on a molar basis. A PTC thermistor includes a component body 1 formed of the semiconductor ceramic. Accordingly, high reliability is achieved even if an alkali metal element is present.

Abstract: A method for manufacturing a ferrite magnet device including a ferrite body and first and second center electrodes arranged so as to intersect and be electrically insulated from each other and a permanent magnet arranged to apply a direct current magnetic field to the ferrite body and a method for manufacturing an isolator or a composite electronic component, which include the ferrite magnet device. A magnetic force of the permanent magnet is adjusted using a measurement jig and a magnetic force adjusting apparatus while the permanent magnet is fixed to a principal surface of the ferrite body.

Abstract: An antenna and a wireless communication device which are suitable for an RFID system and in which radiation characteristics are prevented from being changed as a result of impedance adjustment are configured such that the antenna includes a first loop electrode that has an external shape of a regular polygon or circle and that includes a pair of open ends, feeding portions arranged inside the first loop electrode, a second loop electrode connected to the feeding portions, and a coupling electrode that couples the first loop electrode and the second loop electrode to each other. The wireless communication device is obtained by coupling the wireless communication element which processes a high-frequency signal to the feeding portions.