Murata Manufacturing Co., Ltd.

Dainippon Screen Mfg. Co., Ltd.

Kouichi Ueno

Naoya Matsumoto

Hisanori Murase

Shinya Mizoguchi

Keisuke Hirai

Syuichi Onodera

Masahide Takebe

Akira Murata

To provide a radio-frequency module and a communication apparatus capable of achieving more excellent impedance characteristics. A radio-frequency module includes a first acoustic-wave filter (a first reception filter), a second acoustic-wave filter (a second reception filter), a switch (an antenna switch), a first inductor, and a second inductor. The first acoustic-wave filter transmits a signal in a first communication band. The second acoustic-wave filter transmits a signal in a second communication band. The first inductor is provided between ground and a node on a signal path (a second reception path) with which the switch is connected to the second acoustic-wave filter. The second inductor is connected in series between the switch and the first inductor on the signal path.

Radio-frequency module and communication apparatus

A transmission filter is arranged in a first filter region and has one or more acoustic wave resonators, a plurality of terminal electrodes, and a plurality of wires. A reception filter is arranged in a second filter region and has one or more acoustic wave resonators, a plurality of terminal electrodes, and a plurality of wires. The first filter region and the second filter region are arranged adjacently to each other and have at least sides constituting a pair and opposing to each other. At least either one of the first filter region and the second filter region has no wire extending along one side in a forbidden region that is defined by a width including a terminal electrode nearest to the one side, along the one side and over the one side opposing to the other filter region.

Filter device, high-frequency module, and communication device

A multiplexer includes a switch that individually connects or disconnects between a common terminal and first, second, third, and fourth selection terminals, first and second matching circuits, and first, second, and third filters having different pass bands. The first selection terminal is connected to one end of the first matching circuit, the second selection terminal is connected to one end of the second matching circuit, the other end of the first matching circuit and the other end of the second matching circuit are connected to each other and to one end of the first filter, the third selection terminal is connected to one end of the second filter, and the fourth selection terminal is connected to one end of the third filter.

Multiplexer

A high-frequency module that performs filtering of signals transmitted and received through an antenna includes an antenna terminal, a transmission terminal, a reception terminal, a reception filter connected between the antenna terminal and the reception terminal, a transmission filter connected between the antenna terminal and the transmission terminal, a first element connected between the antenna terminal and the transmission filter, and a second element connected in series between the transmission terminal and the transmission filter. The first element and the second element are capacitively coupled to each other.

High-frequency module

An image recording device that makes it possible to accurately position images on the front and reverse surfaces of a recording medium even when there is an error in length in the direction of conveyance of the recording medium. The image recording device is equipped with a paper supply part, a paper discharge part, a table movement mechanism, which moves ten tables disposed at regular intervals along a circulation path, an image recording part, which records an image on printing paper on top of the table that is moved by this table movement mechanism, an inversion part, which inverts the printing paper, and a transport mechanism, which transports the printing paper inverted by the inversion part to the paper supply part.

Growing community of inventors

Kyoto, Japan

Kouichi Ueno