Murata Manufacturing Co., Ltd.

Kenta Kurahashi

Satoshi Tanaka

Satoshi Arayashiki

Satoshi Sakurai

Tomohito Ito

Kyoichi Hirayama

Motoji Tsuda

A high-frequency module includes a transmission signal amplifier that outputs a transmission signal to an antenna terminal side; a reception signal amplifier that amplifies a reception signal supplied from an antenna terminal; a switch that selectively connects the antenna terminal to either an output of the transmission signal amplifier or an input of the reception signal amplifier; and a directional coupler that is provided on a transmission signal path and detects a signal level of the transmission signal. The transmission signal amplifier is controlled by a first control signal supplied from a first control circuit. The reception signal amplifier is controlled by a second control signal supplied from a second control circuit. The switch is controlled by a switch control signal supplied from the first control circuit. The directional coupler is controlled by a coupler control signal supplied from the first control circuit.

High-frequency module

An elastic wave device that suppresses high-frequency spurious components caused by unwanted waves, such as bulk waves, and improves filter characteristics, includes a piezoelectric substrate, an electrode structure including an IDT electrode provided on the substrate, a first wiring portion that is electrically connected to the IDT electrode, and a second wiring portion provided on a first insulating film that includes a through-hole partially exposing the first wiring portion therethrough. The second wiring portion extends into the through-hole and is electrically connected to the first wiring portion. The second wiring portion is arranged over an area other than the area in which the IDT electrode is disposed.

Elastic wave device having an insulating film with wiring thereon not arranged over the IDT electrodes

Growing community of inventors

Kyoto, Japan

Kenta Kurahashi