Murata Manufacturing Co., Ltd.

Saitama University

Yoshinori Taguchi

Toru Tanizaki

Hiroshi Nishida

Atsushi Saitoh

Yoshimasa Yoshioka

Akinori Hamada

Ikuo Takakuwa

Toshiro Hiratsuka

Taiyo Nishiyama

Nobuhiro Kondo

Ryuichiro Tominaga

Kengo Onaka

Hideaki Yamada

Yohei Ishikawa

Kaoru Sudo

Hitoshi Tada

Koichi Sakamoto

Yasuo Yamada

Tomohiro Nagai

Shinji Yasuda

Muneyoshi Yamamoto

Keiichi Hirose

Masataka Ohira

An inductor component comprising an element body including a first and second magnetic layers that contain a metal magnetic powder and that are laminated along a first direction, a spiral wiring disposed between the first and second magnetic layers, a vertical wiring connected to the spiral wiring and extending in the first direction to penetrate the element body and an external terminal connected to the vertical wiring and exposed on a first principal surface of the element body orthogonal to the first direction. The spiral wiring is disposed on a first plane orthogonal to the first direction and includes a pad part to which the vertical wiring is connected, a spiral part extending from the pad part on the first plane, and a lead-out part extending from the pad part on the first plane and exposed from a side surface of the element body parallel to the first direction.

Inductor component and method of manufacturing inductor component

A filter includes a multilayer substrate and resonators (), (), and () at three stages provided in the multilayer substrate and coupled to a next stage. The multilayer substrate is provided with a floating electrode for coupling an open end portion (A) of a linear conductor of the resonator () at an input stage and an open end portion (B) of a linear conductor of the resonator () at an output stage. The multilayer substrate is provided with a floating electrode for coupling an open end portion (B) of the linear conductor of the resonator () at the input stage and an open end portion (A) of the linear conductor of the resonator () at the output stage.

Filter, antenna module, and communication device

A distributed constant filter includes a resonator that is not grounded and a first ground electrode. The first ground electrode faces the resonator in a first direction (Z). The resonator is a distributed constant line resonator. The resonator includes a plurality of distributed constant lines and a via conductor. The plurality of distributed constant lines are arranged in layers in the first direction (Z). The via conductor extends in the first direction (Z). Each of the plurality of distributed constant lines is connected to the via conductor only at one end portion of both end portions of the distributed constant line.

Distributed constant filter, distributed constant line resonator, and multiplexer

An antenna module includes: a radiating element and a filter device including a plurality of resonators. The plurality of resonators include a first resonator and a second resonator, the second resonator being disposed at a final stage. The first resonator and the second resonator are each electrically coupled to the radiating element. A degree of a coupling of the resonator and the radiating element is weaker than a degree of a coupling of the resonator and the radiating element.

Antenna module and communication device carrying the same

A first end of a linear conductor of a resonator is connected to a ground conductor on a first surface of a dielectric substrate through a via. A second end of the linear conductor of the resonator is left open. A first end of a linear conductor of a resonator is connected to a ground conductor on a second surface of the dielectric substrate through a via. A second end of the linear conductor of the resonator is left open. An input-output line is connected to the ground conductor on the second surface of the dielectric substrate through a via. An input-output line is opposed to the second ends of the linear conductor of the two resonators.

Resonator parallel-coupled filter and communication device

An inductor component comprising a magnetic layer containing a magnetic powder and a resin containing the magnetic powder, a first spiral wiring and a second spiral wiring disposed on the same plane in the magnetic layer and adjacent to each other, and an insulating layer disposed between the first spiral wiring and the second spiral wiring and containing no magnetic substance. The first spiral wiring includes a first side surface facing the second spiral wiring, and at least a portion of the first side surface is in contact with the magnetic layer.

Inductor component

A band pass filter () includes two resonators () and () including respectively linear conductors () and () disposed inside a dielectric substrate (), and a pair of input-output lines () and () to which the two resonators () and () are connected in parallel. Both ends of the linear conductor () of the resonator () are left open. The resonator () includes vias (A) and (B) through which both ends of the linear conductor () of the resonator () are connected to a ground conductor () on a first surface (A) of the dielectric substrate (). The pair of input-output lines () and () include respectively vias (A) and (B) for connection to a ground conductor () that is disposed on a second surface (B) of the dielectric substrate ().

Band pass filter, communication device, and resonator

A printed wiring board comprises a sheet-shaped core base material containing a magnetic material, a coil disposed inside the core base material, and an external circuit layer disposed on at least one of first and second surfaces of the core base material opposite to each other.

Printed wiring board and switching regulator

A method for manufacturing a nonreciprocal circuit device in which a ferrite-magnet device including ferrite having first and second center electrodes arranged to intersect and be electrically insulated from each other and a pair of permanent magnets fixed to both principal surfaces of the ferrite so as to apply a direct current magnetic field to the ferrite is solder-bonded to a surface of a substrate. The ferrite-magnet device is solder-bonded to the surface of the substrate while a magnetic plate is disposed on a back surface of the substrate.

Method for manufacturing nonreciprocal circuit device and method for manufacturing composite electronic component

A dielectric waveguide designed to avoid the influence of reflection of electromagnetic waves at connected portions of dielectric strips and to have an improved characteristic. The distance L between connection planes between pairs of dielectric strips adjacent in the direction of propagation of an electromagnetic wave is set to an odd number multiple of &frac14; of the guide wavelength. Reflected waves are thereby superposed in phase opposition to each other to cancel out. In this manner, propagation of a reflected signal to ports is limited.

Dielectric waveguide with pairs of dielectric strips connected in an off-set manner

A dielectric waveguide designed to avoid the influence of reflection of electromagnetic waves at connected portions of dielectric strips and to have an improved characteristic. A third dielectric strip is inserted in a part of a connection section at which a first dielectric strip and a second dielectric strip are connected to each other, and the distances between the three connection planes in said connection section are determined so that a wave reflected at the connection plane between the first and third dielectric strips, a wave reflected at the connection plane between the first and second dielectric strips, and a wave reflected at the connection plane between the second and third dielectric strips are superposed with a phase difference of 2&pgr;/3 from each other. Alternatively or in addition, the distance between the first-second dielectric strip connection plane and the first-third dielectric strip connection plane is set to &frac16; of the guide wavelength of an electromagnetic wave propagating through the dielectric strips, and the distance between the first-second dielectric strip connection plane and the second-third dielectric strip connection plane is set to &frac16; of the guide wavelength. Reflected waves are thereby superposed in phase opposition to each other to cancel out. In this manner, propagation of a reflected signal to ports is limited.

Dielectric waveguide comprising connected dielectric strips

A dielectric line switch is provided which is capable of easily controlling the propagation of an electromagnetic wave. Also provided is an antenna device employing said dielectric line switch. As an embodiment of the invention, a plurality of dielectric lines and a plurality of primary radiators are provided on a rotary unit. With the rotation of the rotary unit, the dielectric lines are switched ON and OFF by virtue of mechanical means, so that a desired change-over may be effected among the plurality of primary radiators in a time sharing manner, and the positions of the primary radiators may be shifted within a plane of the focal point of a dielectric lens, thereby enabling the transmission wave beam and/or reception wave beam to scan in a desired manner.

Dielectric line switch and antenna device

In a millimeter wave module or the like having both a normal NRD guide and a hyper NRD guide, a conversion portion structure for non, radiative dielectric waveguides of different types has excellent conversion characteristics at the connection between the two types of NRD guides. In a first conversion portion, the width of a dielectric strip is changed from the width of a dielectric strip in the hyper NRD guide portion to the width of a dielectric strip in the normal NRD guide portion, grooves of approximately the same depth as grooves in the hyper NRD guide are provided extending as far as the second conversion portion, and in a third conversion portion, the width of these grooves widens perpendicular to the propagation direction of electromagnetic waves and parallel to the face of conductive plates. According to this structure, guide conversion can be achieved with low radiation in a predetermined frequency band.

Non radiative dielectric waveguide having a portion for line conversion

A normal NRD guide is constituted in the part to be coupled with a dielectric resonator, a hyper NRD guide for simply transmitting the LSM01 mode is constituted in a multipoints circulator part, the normal NRD guide is constituted in a coupler part, the hyper NRD guide is constituted in the mixer part, and the normal NRD guides are constituted in a dielectric line switch part and in a connection unit between components.

Growing community of inventors

Nagaokakyo, Japan

Yoshinori Taguchi