Murata Manufacturing Co., Ltd.

Morio Takeuchi

Yukiya Yamaguchi

Yoichi Sawada

Shigeru Tsuchida

Syunsuke Kido

Takayuki Shinozaki

Motoji Tsuda

Junpei Yasuda

Atsushi Horita

Daisuke Miyazaki

Yusuke Naniwa

Takanori Uejima

Hirotsugu Mori

Hidenori Obiya

Masakazu Tani

Jin Yokoyama

Hiroyuki Kani

Sho Matsumoto

Satoshi Tanaka

Koji Nosaka

Koichiro Kawasaki

Masanori Kato

Hideki Muto

Shinya Mizoguchi

Tetsuro Okuda

Atsushi Takada

Teruaki Oshita

Tadaji Takemura

Yohei Konaka

Hidetaka Takahashi

Takanori Ito

Syuji Yamato

Rui Tanaka

Tomoaki Sato

Hiroki Shonai

Yoshito Matsumura

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 power amplifier, a second power amplifier, a switch, a plurality of first filters, and a second filter. The first power amplifier amplifies a transmission signal of a first frequency band and outputs the amplified transmission signal. The second power amplifier amplifies a transmission signal of a second frequency band and outputs the amplified transmission signal. The pass bands of the plurality of first filters are contained within the first frequency band. The pass band of the second filter is contained within the second frequency band. The second power amplifier has a greater output power level than the first power amplifier. The first output terminal of the first power amplifier is switchably connectable to the plurality of first filters via the switch. The second output terminal of the second power amplifier is connected to the second filter without the switch interposed therebetween.

Radio-frequency module and communication device

A radio-frequency module includes a mounting substrate, a first power amplifier, a second power amplifier, a circuit component (IC chip), and an external connection terminal. The mounting substrate has a first main surface and a second main surface on opposite sides of the mounting substrate. The first power amplifier is mounted on the first main surface of the mounting substrate. The second power amplifier is mounted on the first main surface of the mounting substrate. The circuit component is mounted on the second main surface of the mounting substrate. The external connection terminal is disposed on the second main surface of the mounting substrate. The external connection terminal is connected to a power supply that supplies a power supply voltage to the first power amplifier and the second power amplifier.

A high-frequency module includes a mounting substrate, a first antenna switch, a second antenna switch, a filter (), and a filter (). The filter () and the filter () are respectively connected with an output terminal () and an output terminal (). The second antenna switch is configured to be able to simultaneously execute connection between an input terminal and the output terminal () and connection between the input terminal and the output terminal (). In plan view of the mounting substrate, a distance between an antenna terminal and the first antenna switch is shorter than a distance between the antenna terminal and the second antenna switch. A distance between the first antenna switch and the filter () is longer than a distance between the second antenna switch and the filter ().

High-frequency module and communication device

A multiplexer includes first, second, and third filters with first, second, and third frequency bands different from each other, a first connection point connected to a common terminal, a second connection point connected to one end of the first filter and one end of the second filter, a first switch that switches connection and disconnection between the first and second connection points, a reactance element whose one end is connected to a signal path connecting the second connection point and the first switch, a second switch that switches connection and disconnection between the other end of the reactance element and the first connection point, and a third switch that switches connection and disconnection between one end of the third filter and the first connection point. The first and second frequency bands are adjacent to each other among the first, second, and third frequency bands.

Multiplexer, radio frequency front-end circuit, and communication device

A radio-frequency module includes a mounting substrate and first and second power amplifiers. The first and second power amplifiers are each mounted on one main surface of the mounting substrate. The first power amplifier includes a first input terminal and a first outer periphery. The first outer periphery includes a first edge section. The second power amplifier includes a second input terminal and a second outer periphery. The second outer periphery includes a second edge section. The second edge section opposes the first edge section in a first direction. The first input terminal is disposed in the first edge section of the first power amplifier. The second input terminal is disposed in the second edge section of the second power amplifier. The first and second input terminals do not overlap each other in the first direction.

Radio-frequency module and communication apparatus

A front-end circuit includes a primary circuit and a diversity circuit, the primary circuit includes transmission pathsandfor transmitting a signal in a band A and in a band B, respectively. Transmission and reception of a signal in the band B are performed by a TDD system in the transmission path. The diversity circuit includes a switch, and reception pathsandthat receive a signal in the band A and in the band B, respectively. When reception signals in the band A and in the band B are simultaneously transmitted, and when a reception signal in the band A and a transmission signal in the band B are simultaneously transmitted, the switch causes the diversity antenna and each of the reception pathand the reception pathto be in a conductive state.

Front-end circuit, diversity circuit, and communication device

A composite filter device includes bandpass filters whose respective one ends are electrically connected in common. A first bandpass filter of the bandpass filters includes a first filter, a switch, a second filter, and an impedance element that is electrically connected to the switch and having an impedance value larger than the input impedance value of the second filter. The switch is configured to be switched between a first state in which the first filter and the second filter are electrically connected and a second state in which the first filter and the impedance element are electrically connected.

Composite filter device

A radio frequency circuit includes a first acoustic wave filter that is connected to a common terminal and includes a first acoustic wave resonator, a first LC filter that is connected to the common terminal via the first acoustic wave filter and includes at least one of an inductor or a capacitor, a second acoustic wave filter that is connected to the common terminal and includes a second acoustic wave resonator, and a second LC filter that is connected to the common terminal via the second acoustic wave filter and includes at least one of an inductor or a capacitor.

Radio frequency circuit and communication device

A radio-frequency module includes a mounting substrate having a first main surface; a first power amplifier that is mounted on the first main surface and that amplifies a first transmission signal in a first frequency band; a second power amplifier that is mounted on the first main surface and that amplifies a second transmission signal in a second frequency band different from the first frequency band; a first output matching circuit that is mounted on the first main surface and that receives the first transmission signal amplified by the first power amplifier; and a second output matching circuit that is mounted on the first main surface and that receives the second transmission signal amplified by the second power amplifier. The first output matching circuit and the second output matching circuit are mounted along a second direction intersecting with the first direction.

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 module includes a switch performing switching of the connection between a common terminal and a selection terminal, a reception filter having a reception band in a band A as a passband, a transmission filter that has a transmission band in a band B as a passband and has an output terminal connected to the selection terminal, a filter that has the transmission band in a band B as an attenuation band and has an input terminal connected to the selection terminal, a reception path which connects the selection terminal and an input terminal of the reception filter and on which the filter is disposed, a bypass path which connects the selection terminal and the input terminal of the reception filter and on which no filter is disposed, and a transmission path which connects the selection terminal and a transmission terminal and on which the transmission filter is disposed.

A radio-frequency module includes a transmission path which has one end connected to a transmission terminal and on which a transmission signal in Band A is transmitted; a reception path () which has one end connected to a reception terminal (B) and on which a reception signal in Band B is transmitted; a reception path () which has one end connected to a reception terminal (C) and on which a reception signal in Band C is transmitted; a switch () having a common terminal () and selection terminals (and); and a switch () having a common terminal () and selection terminals (and).

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Nagaokakyo, Japan

Morio Takeuchi