Murata Manufacturing Co., Ltd.

Hidenori Obiya

Shinya Hitomi

Hirotsugu Mori

Shinya Mizoguchi

Satoshi Tanaka

Reiji Nakajima

Takayuki Tsutsui

Kengo Onaka

Hisao Hayafuji

Morio Takeuchi

Atsushi Horita

Hiroya Tanaka

Masahiro Ito

Kiichiro Takenaka

Satoshi Arayashiki

Katsuhito Kuroda

Takaya Wada

Takayuki Shinozaki

Ryuken Mizunuma

Tsuyoshi Sato

Atsuyuki Yuasa

Shingo Yanagihara

Kiyofumi Takai

A radio-frequency circuit includes a first filter having a first passband including a first band; a second filter having a second passband including the first band; a power amplifier that amplifies a radio-frequency signal in the first band; and a switch that switches between connection between the first filter and the power amplifier and a connection between the second filter and the power amplifier. Under a condition that a transmission of the radio-frequency signal in the first band is not V2X communication, the first filter is connected to the power amplifier via the switch. Under a condition that the transmission of the radio-frequency signal in the first band is the V2X communication, the second filter is connected to the power amplifier via the switch.

Radio-frequency circuit and communication apparatus

A radio frequency module includes: a first terminal to which a signal of a first frequency band is inputted, the first frequency band being at least a portion of an unlicensed band higher than or equal to 5 GHz; a second terminal to which a signal of a second frequency band is inputted, the second frequency band being at least a portion of a licensed band lower than 5 GHz; a first amplifier configured to amplify a signal of the first frequency band inputted to the first terminal; and a second amplifier configured to amplify a signal of the second frequency band inputted to the second terminal. In the radio frequency module, the first amplifier and the second amplifier are disposed in one package.

Radio frequency module and communication device

A communication circuit includes a first transfer circuit that includes a first transmitter circuit, and a second transfer circuit that includes a second transmitter circuit that can transmit a signal simultaneously with the first transmitter circuit. The second transmitter circuit is configured to be placed in a transmission halt state when transmission power of the second transmitter circuit resulting from being decreased by a predetermined value is lower than or equal to a threshold.

Communication circuit and control method for communication circuit

A radio-frequency circuit includes a power amplifying circuit configured to amplify a first radio-frequency signal having a first channel bandwidth and a second radio-frequency signal having a second channel bandwidth greater than the first channel bandwidth. The power amplifying circuit is configured to amplify the first radio-frequency signal in an amplifying mode according to an average power tracking method, and to amplify the second radio-frequency signal in an amplifying mode according to an envelope tracking method.

Radio-frequency circuit and communication device

A radio frequency circuit includes an amplifier capable of amplifying a first radio frequency signal and a second radio frequency signal that has a frequency different from a frequency of the first radio frequency signal. Here, the amplifier uses a first power-supply voltage to amplify one of the first radio frequency signal and the second radio frequency signal and uses a second power-supply voltage to amplify both the first radio frequency signal and the second radio frequency signal together. A value of the second power-supply voltage is greater than a value of the first power-supply voltage.

Radio frequency circuit, radio frequency module, and communication device

A radio-frequency circuit is capable of simultaneously transmitting a radio-frequency signal of a middle high band group (MHB) including B1 and B3, and a radio-frequency signal of a ultra-high band group (UHB) including n77, and includes: a first transfer circuit that transfers the MHB radio-frequency signal and a radio-frequency signal of a low band group (LB); and a second transfer circuit that transfers the UHB radio-frequency signal. The first transfer circuit includes: a power amplifier for B1 signals; a diplexer that demultiplexes and/or multiplexes the MHB radio-frequency signal and the LB radio-frequency signal; a transmission filter that is connected to the power amplifier and has, as a passband, a transmission band of B1; and a band-elimination filter that is disposed between the diplexer and the transmission filter, and has, as an attenuation band, a transmission band of n77. The second transfer circuit includes a power amplifier for n77 signals.

A multiplexer includes: a common filter, a first filter connected to the common terminal and having a passband including a reception band of a first communication band; a second filter connected to the common terminal and having a passband including a transmission band of the first communication band; a third filter connected to the common terminal and having a passband including a transmission band of a second communication band; and a fourth filter connected to the common terminal and having a passband including a reception band of the second communication band. The transmission band of the first communication band and the transmission band of the second communication band are located between the reception band of the first communication band and the reception band of the second communication band, and at least one of the first communication band or the second communication band is a 5G-NR communication band.

Multiplexer and communication device

A radio-frequency circuit includes a power amplifying circuit configured to amplify a first radio-frequency signal having a first channel bandwidth and a second radio-frequency signal having a second channel bandwidth greater than the first channel bandwidth. The power amplifying circuit is configured to amplify the first radio-frequency signal in an amplifying mode according to an envelope tracking method, and to amplify the second radio-frequency signal in an amplifying mode according to an average power tracking method.

A multiplexer includes a common terminal, a first filter configured to be connected to the common terminal, and having a first passband, a second filter configured to be connected to the common terminal, and having a second passband that at least partially overlaps the first passband, and a third filter configured to be connected to the common terminal, and having a third passband that does not overlap both the first passband and the second passband.

A communication circuit includes a first transfer circuit that includes a first transmitter circuit, and a second transfer circuit that includes a second transmitter circuit that can transmit a signal simultaneously with the first transmitter circuit. When a difference between requested power and scheduled power is greater than a predetermined value, the second transmitter circuit is configured to change transmission power of the second transmitter circuit to adjust the difference to a value smaller than the predetermined value, the requested power being requested transmission power, the scheduled power being transmission power to be transmitted based on the requested power.

A radio frequency circuit includes a first transfer circuit including a first filter and a second filter, and a second transfer circuit including a third filter and a fourth filter. Passbands of the first filter and the third filter at least partially overlap each other. Passbands of the second filter and the fourth filter at least partially overlap each other. The first filter transfers a radio frequency signal of a first communication system. The third filter transfers a radio frequency signal of a second communication system. The second filter transfers one of a radio frequency signal of the first communication system or a radio frequency signal of the second communication system. The fourth filter transfers the other of a radio frequency signal of the first communication system or a radio frequency signal of the second communication system.

Radio frequency circuit and communication device

A radio-frequency circuit includes: a first transfer circuit that outputs a B1 or B3 first transmission signal amplified by a first power amplifier from a first input/output terminal; a second transfer circuit that outputs an n77 or n79 second transmission signal amplified by a second power amplifier from a second input/output terminal; and a switch. When a B1 first transmission signal and an n77 second transmission signal are simultaneously transmitted, the switch connects the first transfer circuit to a first antenna and connects the second transfer circuit to a second antenna since intermodulation distortion IMD2 overlaps with B1. When a B3 first transmission signal and an n79 second transmission signal are simultaneously transmitted, the switch connects both of the first transfer circuit and the second transfer circuit to the first antenna since intermodulation distortion IMD2 does not overlap with B3.

A communication circuit includes a first transfer circuit that includes a first transmitter circuit, and a second transfer circuit that includes a second transmitter circuit that can transmit a signal simultaneously with the first transmitter circuit. The second transmitter circuit is configured to be placed in a transmission halt state when a difference between requested power and scheduled power is greater than a predetermined value, the requested power being requested transmission power, the scheduled power being transmission power to be transmitted based on the requested power.

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Kyoto, Japan

Hidenori Obiya