Murata Manufacturing Co., Ltd.

Murata Manufacturingco., Ltd.

Murata Manufactruing Co., Ltd.

Kenichi Ishizuka

Noboru Kato

Hiroshi Nishida

Satoshi Shigematsu

Kazunari Kawahata

Noriyuki Ueki

Kentaro Mikawa

Takafumi Nasu

Nobuhito Tsubaki

Hideaki Kobayashi

Shigeyuki Fujieda

Shinichi Nakano

Koji Shiroki

Hisashi Akiyama

Satoshi Ishino

Hirokazu Yazaki

Toshiyuki Nakaiso

Yuichiro Teshima

Tsuyoshi Tokunaga

Takeaki Tamayama

Akira Ochiai

A power splitter includes a common port, a first port, a second port, a first phase shifter connected between the common port and the first port, and a second phase shifter connected between the common port and the second port. The first phase shifter includes a first capacitor, a first inductor, and a second inductor. The second phase shifter includes a second capacitor, a third inductor, and a fourth inductor.

Power splitter and communication apparatus

A filter module includes a circuit board on or in which a ground electrode is provided, and a low pass filter on the circuit board. The low pass filter includes first and second inductors, and a capacitor. The first and second inductors are cumulatively connected to each other. Relationships of Lp+Lg−M≥0 and Lp−M<0 are satisfied, where Lp denotes an inductance of a path between a connection portion between the first and second inductors and a ground terminal, Lg denotes an inductance of a path between the ground terminal and the ground electrode, and M denotes a mutual inductance between the first and second inductors.

Filter module, filter element, and electronic device

A filter includes a first capacitor connected in series between a first terminal pair and a second terminal pair, a first inductor connected in parallel with the first capacitor, and a second inductor connected in parallel between the first terminal pair and the second terminal pair. The first inductor and the second inductor are magnetically coupled to each other and are differentially connected to each other.

Filter, filter module, and electronic device

A coil component includes coils in a multilayer body with a rectangular or substantially rectangular parallelepiped shape. The coil component includes outer electrodes, a first coil, and second coils. The first coil includes conductor patterns and via conductors. When the multilayer body is divided by a bisecting line into first and second regions in a longitudinal direction of the multilayer body when viewed in the stacking direction, the first coil is located in the first region. When viewed in the stacking direction, straight lines connecting the via conductors with a first outer electrode and a fourth outer electrode at a minimum distance cross an opening region of the first coil.

Coil component

An antenna device includes a radiating element, a coupling circuit, and a non-radiating resonant circuit. The coupling circuit includes first and second coupling elements, the first coupling element being connected between a feeder circuit and the radiating element, the second coupling element being coupled to the first coupling element. An end of the second coupling element is grounded, and another end of the second coupling element is connected to the non-radiating resonant circuit. A frequency characteristic of a return loss of the radiating element when seen from the feeder circuit is adjusted by a resonant frequency characteristic of the non-radiating resonant circuit.

Antenna device and electronic equipment

A multi-terminal chip inductor includes coil conductors in base material layers, an interlayer connection conductor connecting the coil conductors across layers, and external electrodes each connected to portions of a series of coil conductors defined by the coil conductors and the interlayer connection conductor. The external electrodes include a common external electrode. A first of the coil conductors to which the common external electrode and a first external electrode adjacent to the common external electrode in a circuit are connected, includes first coil conductors connected to each other in parallel.

Multi-terminal chip inductor

A circuit element includes a multilayer body, internal elements inside the multilayer body, and first outer electrodes and second outer electrodes on outer surfaces of the multilayer body, and the multilayer body includes laminated base material layers. The internal elements include coil conductors connected to the second outer electrodes, the coil conductors have a winding axis in the laminating direction of the base material layers, the first outer electrodes are in contact with a mounting surface of the multilayer body, the second outer electrodes are in contact with side edges of the multilayer body and separated from the mounting surface, and maximum widths of the second outer electrodes are smaller than maximum widths of the first outer electrodes.

Circuit element

An antenna device includes a first radiating element, a second radiating element having lower radiation efficiency than the first radiating element, a coupling element including first and second coils that are electromagnetically coupled to each other, and first and second phase adjusting elements. The first and second phase adjusting elements induce, at a resonant frequency of the second radiating element, a predetermined proportion of current flowing through the second radiating element to the first radiating element.

Antenna device and electronic apparatus

A filter circuit module includes a filter circuit element, a circuit board with the filter circuit element mounted thereon, and a first inductor. The filter circuit element includes a resonant circuit capacitor defining a portion of an LC parallel resonant circuit, and a phase-shift circuit. The circuit board includes a second inductor. A primary coil and a secondary coil of the phase-shift circuit are overlapped with the second inductor, viewed in a direction of a winding axis. The resonant circuit capacitor is closer to a mounting surface on which the filter circuit element is mounted on the circuit board, compared with the primary coil and the secondary coil. The resonant circuit capacitor includes a capacitor electrode covering a coil opening of the primary coil and a coil opening of the secondary coil, viewed in the direction of the winding axis.

Filter circuit module, filter circuit element, filter circuit, and communication apparatus

An LC composite component includes a multilayer body including insulating base members that are laminated and include insulating base members on which conductor patterns are provided. Capacitor conductor patterns are provided on insulating base members different from an insulating base member on which a coil conductor pattern is provided, and each include an extending portion overlapping with a line segment connecting a center of a first terminal and a center of a second terminal in a shortest distance as viewed in the lamination direction and projecting portions projecting in directions different from the direction of the line segment, and the projecting portions overlap with linear portions of the coil conductor pattern without overlapping with bent portions thereof as viewed in the lamination direction.

LC composite component and communication terminal device

First and second coils have winding axes in a laminated direction of base material layers and are magnetically coupled to each other. First and second capacitors are positioned in the laminated direction on layers different from layers on which the first and second coils are provided. The first and second coils are connected so that the winding directions of the first and second coils are opposite. The second capacitor is connected in parallel to a series circuit of the first coil and the second coil. The first capacitor is connected between a position where the first coil is connected to the second coil and a reference potential electrode. Mutual inductance caused by coupling between the first and second coils and the first capacitor provides a first attenuation pole and a parallel connection circuit of the series circuit and the second capacitor provides a second attenuation pole.

Filter element

A matching circuit includes first and second input/output ports; first, second, and third coils; and a capacitor. The first coil is connected in series between the first and second input/output ports, and the second coil is connected in shunt between a ground and an input/output line between the first and second input/output ports. The first and second coils are magnetically coupled to each other, the third coil is magnetically coupled to at least one of the first and second coils, the capacitor is directly or indirectly connected to the third coil, and a closed circuit including the capacitor and the third coil is provided.

Matching circuit, matching circuit element, and communication device

An antenna device includes first and second radiating elements, and an antenna coupling element. The antenna coupling element includes a primary coil electrically connected between the first radiating element and a feed circuit and a secondary coil inductively coupled to the primary coil and electrically connected between the second radiating element and a ground. A capacitor is provided between the primary coil and the secondary coil, thus causing current to flow from the primary coil to the secondary coil or the second radiating element via the capacitor even at an anti-resonant frequency of the first radiating element.

Antenna coupling element, antenna device, and electronic device

An antenna apparatus includes an antenna element, a switch with a common terminal that is electrically connected to the antenna element side, a first signal path provided between a first input/output terminal of the switch and a first communication circuit, and a second signal path provided between a second input/output terminal of the switch and a second communication circuit. The first signal path includes a radio-frequency circuit and a phase shifter, and the RF circuit has an impedance that is open or shorted in a second frequency band as seen from the antenna element side. In a state in which the first input/output terminal and the second input/output terminal are both electrically connected to the common terminal, the phase shifter provides a phase shift, and the impedance in the second frequency band of the first signal path as seen from the common terminal is open.

Antenna apparatus

In a high-frequency transformer element includes a primary coil including first coil conductors and a secondary coil including second coil conductors are disposed in a multilayer body that includes a plurality of insulating layers. A magnetic-field cancellation conductor pattern is disposed in the multilayer body, is adjacent to some conductors of the first coil conductors in a lamination direction of the insulating layers, is arranged along a surface of the insulating layers, and allows a high-frequency current to flow in a direction opposite a high-frequency current flowing in the first coil conductors.

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Nagaokakyo, Japan

Kenichi Ishizuka