Murata Manufacturing Co., Ltd.

Tsutomu Ieki

Hironobu Takahashi

Noboru Kato

Hiroaki Tanaka

Yutaka Ida

Yasuhiko Hirano

Makoto Kawagishi

Yuya Dokai

Keiichi Ichikawa

Osamu Chikagawa

Koji Shiroki

Shinji Goma

Satoru Noda

Kazuya Kato

Tadashi Kani

Ken Sakai

Yoshikazu Yagi

Fumikiyo Kawahara

Kazuyuki Yuda

A wireless power receiver device includes a sheet-like electrode sheet section and a power receiver section. The electrode sheet section includes a power receiver side active electrode and a power receiver side passive electrode that are substantially coplanar and formed into sheet-like shapes; lead lines that are coplanar with both the electrodes, extended from the respective electrodes, and formed into sheet-like shapes; and an insulation sheet that covers both the electrodes and both the lead lines from both sides thereof. The power receiver section includes a step-down unit that steps down an alternating-current voltage induced between end portions of the lead lines; a power receiver module that rectifies and smoothes the alternating-current voltage that is stepped down by the step-down unit; and a connector for outputting an output voltage of the power receiver module.

Wireless power receiver device, wireless power transmitter device, and wireless power transceiver device

A circuit module equipped with a primary coil of a step-down transformer formed by primary coils of a plurality of transformer elements connected in series with each other and a secondary coil formed by secondary coils of the transformer elements connected in series with each other, includes a printed substrate on which the transformer elements are mounted in a lengthwise direction, a connection terminal coupled to a first end of the primary coil of the step-down transformer and connection terminals coupled to the secondary coil of the step-down transformer, the connection terminals are positioned such that the transformer elements are interposed therebetween. As a result, provided are a transformer module that reduces the effect of a high-voltage portion on a low-voltage portion by securing a distance between the high-voltage portion and the low-voltage portion, and a power reception device and a power transmission device equipped with the transformer module.

Transformer module, power reception device and power transmission device

An active electrode and a passive electrode provided in a power transmitting apparatusare connected to an inductor provided on the secondary side of a transformer generating an AC voltage and are respectively coupled to an active electrode and a passive electrode of a power receiving apparatus through electric fields. A ground electrode of the power transmitting apparatus faces the active electrode and the passive electrode and a ground electrode of the power receiving apparatus faces the active electrode and the passive electrode. A plurality of openings are formed in such a manner as to form a lattice in each of the ground electrodes.

Power transmitting apparatus, power receiving apparatus, and non-contact power transmission system

In a transceiver, on a top surface of a rectangular plate-shaped substrate, transmission radiating elements and receiving radiating elements are provided. The transmission radiating elements extend in the horizontal or lateral direction from the center of the substrate. The receiving radiating elements extend in the vertical or longitudinal direction from the center of the substrate. Inductors included in a matching feeding element are individually electromagnetically coupled to transmission-side feeding points that are inner end portions of the transmission radiating elements and receiving-side feeding points that are inner end portions of the receiving radiating elements. A transmission signal is transmitted with a wave polarized in the horizontal or lateral direction, and a signal having a vertical or longitudinal polarization direction is received.

Transceiver and radio frequency identification tag reader

A power transmitting apparatus includes an active electrode, a passive electrode, a voltage generating circuit that applies a voltage between the active electrode and the passive electrode, and a reference potential electrode connected to a reference potential. A power receiving apparatus includes an active electrode, a passive electrode, a secondary battery connected between the active electrode and the passive electrode, and a reference potential electrode connected to a reference potential. Power is transmitted from the power transmitting apparatus to the power receiving apparatus as a result of the respective electrodes facing each other and being capacitively coupled to each other when the power receiving apparatus is mounted to the power transmitting apparatus.

Wireless power transmission system

A radio IC device includes a flexible dielectric base, a radiation element that is a metal film or a metal foil wrapped around the dielectric base, and a radio IC element mounted on the radiation element. The radiation element includes, in a portion other than a portion where the radio IC element is disposed, a bonded portion that is bonded to the dielectric element and a non-bonded portion that is not bonded to the dielectric element. The radio IC element is arranged to be directly opposed to the dielectric element with the portion of the radiation element where the radio IC element is disposed not bonded to the dielectric base.

Radio IC device

An antenna device includes an antenna element and an impedance conversion circuit connected to the antenna element. The impedance conversion circuit is inserted between the antenna element and a feeding circuit, and includes a first series circuit where a first coil conductor and a second coil conductor are connected in series, and a second series circuit where a third coil conductor and a fourth coil conductor are connected in series. The first and second coil conductors define a closed magnetic circuit through which a closed loop of a first magnetic flux passes, and the third and fourth coil conductors define a closed magnetic circuit through which a closed loop of a second magnetic flux passes. Consequently, the antenna device performs impedance matching with the feeding circuit in a wide frequency band.

Antenna device and communication terminal apparatus

A component-embedded module includes a module substrate having wiring electrodes on the upper surface thereof, first circuit components mounted on the wiring electrodes, a sub-module disposed on an area on which no wiring electrodes are provided, and an insulating resin layer provided on substantially the entire upper surface of the module substrate such that the insulating resin layer covers at least a portion of the first circuit components and sub-module. The second circuit components including an integrated circuit element are mounted on the sub-module or embedded therein. Via conductors are provided through the module substrate from the lower surface thereof and are directly coupled to terminal electrodes on the lower surface of the sub-module. By using a substrate having a wiring greater accuracy than that of the module substrate, a reliable component-embedded module is obtained.

Component-embedded module and manufacturing method thereof

A component incorporating module includes an insulation resin layer, a plurality of lands arranged to mount components and wiring patterns connected to the plurality of lands, which are arranged along a first main surface of the resin layer, and circuit components connected to the lands to mount components. The circuit components are embedded in the resin layer. The plurality of lands have thicknesses that are greater than those of the wiring patterns adjacent to the corresponding lands.

Component incorporating module

A module substrate defined by an aggregate substrate is prepared, and circuit components are mounted on the module substrate. An insulating resin layer is formed on substantially the entire top surface of the module substrate such that the circuit components are disposed in the insulating resin layer, and a top-surface-shielding layer is formed on the top surface of the insulating resin layer. First through holes are formed in the module substrate and the insulating resin layer at locations corresponding to portions of boundary lines of small substrates so as to extend in a thickness direction of the module substrate and the insulating resin layer. First electrode films are formed on the inner surfaces of the first through holes so as to be connected to the first shielding layer, and the first through holes are filled with a filling material. Next, second through holes are formed at locations corresponding to the remaining portions of the boundary lines of small substrates so as to extend in the thickness direction, and second electrode films are formed on the inner surfaces of the second through holes so as to be connected to the top-surface-shielding layer and the first electrode films. The filling material, with which the first through holes are filled, is cut along the boundary lines of small substrates, resulting in a division of the aggregate substrate into small substrates to obtain circuit modules.

Method for manufacturing circuit modules and circuit module

A microstrip line includes a strip conductor, a line electrode, and edge electrodes provided at the edges on both sides of the line electrode. The construction of the microstrip line greatly reduces the edge effect of the line electrode and decreases the conductor loss of the line electrode.

Microstrip line having a line electrode with integral edge electrodes

A dielectric substrate, a transistor, which is an active device, a varactor diode, which is a frequency-variable device, are mounted on one main surface of a package substrate to configure an oscillator. The dielectric substrate is made from a large-dielectric-constant dielectric having high temperature stability. A microstrip-line resonator is formed by thin-film-electrode forming. The microstrip-line resonator and the transistor constitute an oscillating circuit.

Oscillator with dielectric resonator and electronic apparatus using the same

An oscillator module in which external wires can be reduced, and characteristics of a resonator and oscillation margin can be measured. A circuit portion for oscillation and a two-port surface acoustic wave resonator are sealed in a package, one of the terminals of the two-port surface acoustic wave resonator is connected inside the package to an input terminal of the circuit portion for oscillation. The number of external terminals provided at the package is reduced, enabling the oscillator module to be made small-scale and at lower cost. Furthermore, it is possible to measure the insertion loss and resonant frequency of the two-port surface acoustic wave resonator, and the oscillation margin of the oscillator module, making it possible to improve the yield of the oscillator and reduce costs.

Oscillator module and communications device using the same

An FSK modulator including an amplifier for oscillation has a surface acoustic wave resonator connected in series with a switching circuit formed without a variable-capacity diode but including a semiconductor switch and one or more fixed-capacity capacitors. When an input signal is received, the switch causes a capacitor or combination of capacitors to become connected in series with the surface acoustic wave resonator, providing oscillations with two frequencies to effect FSK modulation.

Growing community of inventors

Nagaokakyo, Japan

Tsutomu Ieki