Murata Manufacturing Co., Ltd.

Katsuya Ikegami

Wataru Takahashi

Kazuhiro Ikarashi

A variable circuit includes a switch including a plurality of input terminals and a plurality of output terminals and an external wiring line. The multiple input terminals include a first input terminal to which a first input signal is inputted and a second input terminal to which a second input signal is inputted. The multiple output terminals include a first output terminal from which a first output signal is outputted and a second output terminal from which a second output signal is outputted. The switch is capable of forming at least one internal connection path electrically connecting any one of the multiple input terminals and any one of the multiple output terminals. The external wiring line is disposed outside the switch and is configured to electrically connect the second output terminal to the second input terminal.

Variable circuit

A transmission/reception module includes a substrate including a transmission signal input terminal, a reception signal output terminal, and an antenna terminal, an antenna switch circuit provided on the substrate and configured to output a transmission signal input from the transmission signal input terminal to the antenna terminal and configured to output a reception signal input from the antenna terminal to the reception signal output terminal, and a first inductor included in an input/output filter circuit provided between the antenna switch circuit and the antenna terminal. The first inductor includes a conductor whose winding axis direction is orthogonal to the substrate.

Transmission/reception module

A radio frequency module () includes a first switch (), an attenuation filter (), and a plurality of band pass filters (A toC,A toC). The first switch () is a switch that is capable of simultaneously connecting a common terminal () to selection terminals () out of a plurality of selection terminals (to). The plurality of band pass filters (A toC,A toC) include a first band pass filter (A) and a second band pass filter (B). The attenuation filter () includes at least one reactive element out of an inductive element and a capacitive element. In the radio frequency module (), the reactive element is adjacent to at least one band pass filter out of the plurality of band pass filters (A toC,A toC).

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Kyoto, Japan

Katsuya Ikegami