Murata Manufacturing Co., Ltd.

Masato Nomura

Yuya Dokai

Noboru Kato

Tsuyoshi Mukai

Hiromi Murayama

Kazuaki Higashibata

An antenna module includes an antenna element including coil patterns and via conductors coupling together two adjacent two coil patterns. At least one of the coil patterns has a spiral shape, is wound three or more turns parallel or substantially parallel to an outer edge of a principal surface of a multilayer body, includes a first partial pattern including an outer end portion, a second partial pattern extending parallel or substantially parallel with the first partial pattern and being adjacent to the first partial pattern with a first gap provided therebetween, and a third partial pattern extending parallel or substantially parallel with the second partial pattern and being adjacent to the second partial pattern with a second gap provided therebetween, the second gap being smaller than the first gap.

Antenna module

An antenna module includes a base including two opposing mounting surfaces, an antenna coil provided on or in the base so as to define an opening, the antenna coil having a shape that is symmetrical or substantially symmetrical with respect to a reference plane, and an IC chip and a plurality of electronic components mounted on one of the mounting surfaces and electrically coupled to the antenna coil, the IC chip and the electronic components being arranged inside the opening when viewed in plan from a normal direction of the mounting surface. At least two of the plurality of electronic components are arranged so as to be symmetrical or substantially symmetrical to each other with respect to the reference plane when viewed in plan from the normal direction.

An antenna includes two feeding points, and includes a loop-shaped loop electrode and an auxiliary electrode electrically connected to the loop electrode and located at a position along the outer circumference of the loop electrode. The first end portion of the auxiliary electrode is electrically connected to the vicinity of one feeding point of the loop electrode. The second end portion of the auxiliary electrode is open. A resonant circuit is defined by the auxiliary electrode and the loop electrode to enhance the impedance of the antenna, compared with a case in which the antenna is configured using the simple loop electrode, and it is easy to achieve impedance matching with the wireless IC.

Antenna and wireless IC device

A communication terminal device includes a UHF-band RFID system including a wireless IC element for UHF-band RFID and a loop-shaped conductor coupled to the wireless IC element for UHF-band RFID, and a UHF-band mobile communication system including a wireless IC element for UHF-band mobile communication and an antenna conductor coupled to the wireless IC element for UHF-band mobile communication. The loop-shaped conductor and the antenna conductor are closely adjacent to each other. The loop-shaped conductor is electromagnetically coupled to a portion of the antenna conductor.

Communication terminal device including a UHF-band RFID system

A communication device includes a radiator defining a duplex antenna of a first communication system whose carrier frequency is in a first frequency band and a second communication system whose carrier frequency is in a second frequency band overlapping the first frequency band, an antenna for the second communication system, a second communication system power feeding unit which is connected to the radiator and the antenna for the second communication system, and a first communication system power feeding unit which is connected to the radiator, wherein the first communication system power feeding unit includes a circuit configured to position a communication peak frequency whose communicable distance in the first communication system is maximum, outside the second frequency band.

Communication device

A battery pack that includes a secondary battery, a resin structure including the secondary battery, and a flat-shaped, contactless power transfer coil embedded at a first face side of the resin structure. The resin structure contains a magnetic material at least at the first face side thereof.

Battery pack with contactless power transfer

A component-containing module includes a core substrate which includes a lower surface including recessed portions and a raised portion, and an upper surface facing the lower surface and which includes a plurality of in-plane conductors, an integrated circuit element arranged at a location which is above the upper surface and which corresponds to the raised portion, a first passive element and a second passive element disposed in the recessed portions of the lower surface, a composite resin layer which underlies the lower surface and which has a flat or substantially flat surface, and an external terminal electrode which is disposed on the flat or substantially flat surface of the composite resin layer and which is electrically connected to the in-plane conductors of the core substrate. The component-containing module enables electronic components, such as integrated circuit elements and passive elements, to be densely arranged and to be reduced in profile and size.

Growing community of inventors

Nagaokakyo, Japan

Masato Nomura