Murata Manufacturing Co., Ltd.

Tomohiro Sano

Hirotsugu Mori

Hiroyuki Kani

A radio frequency circuit includes a power amplifier configured to selectively amplify one of a first radio frequency signal and a second radio frequency signal that have different bandwidths, and when the first radio frequency signal is input to the power amplifier, a first bias signal is applied to the power amplifier, and when the second radio frequency signal is input to the power amplifier, a second bias signal different from the first bias signal is applied to the power amplifier.

Radio frequency circuit, communication device, and antenna module

In simultaneous communication using multiple frequency bands, the degradation in the communication quality is suppressed. The radio-frequency front-end circuit () includes an antenna terminal (), a transmit filter (), a receive filter, a transport filter, a switch (), and a phase adjusting circuit (). The switch () is capable of connecting the antenna terminal () to the transmit filter () or the receive filter and the transport filter simultaneously. The transmit filter () is disposed on a transmission path (T). The receive filter is disposed on a reception path. The transport filter is disposed on a transport path. The phase adjusting circuit () is disposed on at least one of paths, the transmission path (T), the reception path, and a reception/transmission path.

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Nagaokakyo, Japan

Tomohiro Sano