公开(公告)号：US20240056108A1

公开(公告)日：2024-02-15

申请号：US18495099

申请日：2023-10-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenji TAHARA ,  Takanori UEJIMA ,  Hiroyuki NAGAMORI ,  Takahiro KATAMATA

IPC: H04B1/00

CPC classification number: H04B1/0057 ,  H04B1/006

Abstract: A high frequency circuit includes a switch that includes terminals; a switch that includes terminals; a filter that has a pass band including a first band; and a diplexer that includes terminals. The diplexer includes a filter that is connected between the terminals and has a pass band including a first frequency band group containing the first band and a filter that is connected between the terminals and has a pass band including a second frequency band group. The terminal is connected to an antenna terminal. The terminals are connected to one terminal of the filter. The terminal is connected to the terminal. The terminal is connected to the terminal.

公开(公告)号：US20220311395A1

公开(公告)日：2022-09-29

申请号：US17807188

申请日：2022-06-16

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenji TAHARA ,  Kenichi SHIMAMOTO ,  Takashi YAMADA

IPC: H03F3/24 ,  H03F3/195 ,  H03F1/30

Abstract: Gain is suppressed. In a power amplification circuit, a first transistor has a first input terminal, a first output terminal, and a first ground terminal. A second transistor has a second input terminal, a second output terminal, and a second ground terminal. The second input terminal is connected to the first input terminal. The second output terminal is connected to the first output terminal. A first bias circuit is connected to the first input terminal. A second bias circuit is connected to the second input terminal. A first resistor is connected between the first ground terminal and the ground. A second resistor is connected between the second ground terminal and the ground. The second resistor has a resistance value greater than that of the first resistor.

公开(公告)号：US20210028798A1

公开(公告)日：2021-01-28

申请号：US17071112

申请日：2020-10-15

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenji TAHARA

IPC: H04B1/00 ,  H04B1/04 ,  H03H7/46 ,  H04B1/401

Abstract: A radio frequency module includes a transmit filter of Band A and Band B, a transmit amplifier, and a switch circuit and can perform CA using a transmit signal of Band A and a receive signal of Band B, a transmit band of Band B including a receive band of Band C. The switch circuit includes a switch switching connection between a common terminal and a first selection terminal, a switch switching connection between the common terminal and a second selection terminal, and a switch switching connection between the second selection terminal and a third selection terminal. The common terminal is connected to the transmit amplifier. The first selection terminal is connected to the transmit filter of Band A. The second selection terminal is connected to the transmit filter of Band B. The third selection terminal is connected to a receive path of Band C.

公开(公告)号：US20210006273A1

公开(公告)日：2021-01-07

申请号：US17023822

申请日：2020-09-17

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenji TAHARA ,  Reiji NAKAJIMA

IPC: H04B1/00 ,  H01Q3/36 ,  H04B1/04

Abstract: Opposite-side frequency bands are opened in a plurality of carrier aggregations. In a radio frequency module, a variable phase shifter differentiates a phase in a first single mode in which signals of a first frequency band are communicated and a phase in a first carrier aggregation mode and differentiates the phase in the first single mode and a phase in a second carrier aggregation mode. The variable phase shifter makes a phase difference between the phase in the first single mode and the phase in the first carrier aggregation mode different from a phase difference between the phase in the first single mode and the phase in the second carrier aggregation mode.