公开(公告)号：US20240223223A1

公开(公告)日：2024-07-04

申请号：US18411054

申请日：2024-01-12

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Reiji NAKAJIMA

IPC: H04B1/00 ,  H03F3/24

CPC classification number: H04B1/0057 ,  H03F3/245 ,  H03F2200/165 ,  H03F2200/171 ,  H03F2200/451

Abstract: Reduction of reception sensitivity, which is caused by inter-modulation distortion occurring between a first transmit signal and a second transmit signal, is suppressed. A first filter has a passband including the transmit band of a first communication band. A second filter has a passband including the transmit band of a second communication band. A third filter has a passband including the receive band of the first communication band. The first communication band and the second communication band are communication bands available for simultaneous transmission. At least a part of the frequency range of the inter-modulation distortion, which occurs between the first transmit signal in the first communication band and the second transmit signal in the second communication band, overlaps at least a part of the receive band of the first communication band.

公开(公告)号：US20210336640A1

公开(公告)日：2021-10-28

申请号：US17224162

申请日：2021-04-07

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Reiji NAKAJIMA

IPC: H04B1/04 ,  H03F3/24

Abstract: A radio frequency circuit is capable of sending a transmit signal of a first communication band and a transmit signal of a second communication band simultaneously and includes a transmit input terminal, a power amplifier capable of amplifying a transmit signal of the first communication band, and a filter connected between the transmit input terminal and an input terminal of the power amplifier. In the filter, a pass band is a band including a transmit band of the first communication band, and an attenuation band is a band including a transmit band of the second communication band.

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.

公开(公告)号：US20200020645A1

公开(公告)日：2020-01-16

申请号：US16581911

申请日：2019-09-25

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Reiji NAKAJIMA

IPC: H01L23/552 ,  H01L23/538 ,  H01L25/18 ,  H03F1/26 ,  H01L23/31 ,  H03F3/21 ,  H01L23/66 ,  H03F3/68 ,  H04B1/04 ,  H04B1/00

Abstract: A circuit module (100) includes an electronic component (30), a plurality of conductor posts (40), a mold layer (50) that seals a plurality of the electronic components (30) and the plurality of conductor posts (40), and a shield layer (60) on the mold layer (50). The electronic components (30) include a first electronic component (31) and second electronic components (32, 36). The plurality of conductor posts (40) includes a group of conductor posts (400) traversing between the first electronic component (31) and the second electronic components (32, 36). The shield layer (60) includes a slit (600) that, with respect to each conductor post (40) included in the group (400) of conductor posts, in a plan view, passes and extends between the conductor post (40) and the first electronic component (31), or between the conductor post (40) and the second electronic components (32, 36).

公开(公告)号：US20180227008A1

公开(公告)日：2018-08-09

申请号：US15941078

申请日：2018-03-30

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hidenori OBIYA ,  Reiji NAKAJIMA ,  Shinya HITOMI

IPC: H04B1/40 ,  H03F3/19 ,  H03F3/24 ,  H03F1/56

CPC classification number: H04B1/40 ,  H03F1/56 ,  H03F3/19 ,  H03F3/195 ,  H03F3/245 ,  H03F3/72 ,  H03F2200/111 ,  H03F2200/168 ,  H03F2200/294 ,  H03F2200/387 ,  H03F2200/411 ,  H03F2200/451 ,  H03F2203/7209 ,  H04B1/00 ,  H04B1/0057 ,  H04B1/04 ,  H04B1/0458 ,  H04B1/18 ,  H04B1/48

Abstract: A PA module (10A) includes a previous stage amplification element (12) to amplify a high-frequency signal, a posterior stage amplification element (13) to amplify the high-frequency signal amplified by the previous stage amplification element (12), and a variable filter circuit arranged between the previous stage amplification element (12) and the posterior stage amplification element (13) to vary a pass band and an attenuation band in accordance with a frequency band of the high-frequency signal, in which the variable filter circuit includes a filter portion (16) and switches (14 and 15) to vary the pass band and the attenuation band of the variable filter circuit, and the previous stage amplification element (12) and at least a part of the switches (14 and 15) are formed in one chip using a chip A, the posterior stage amplification element (13) are included in a second chip which is different from the chip A.

公开(公告)号：US20170179998A1

公开(公告)日：2017-06-22

申请号：US15447412

申请日：2017-03-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kengo ONAKA ,  Katsuhito KURODA ,  Yuki NAKAIKE ,  Reiji NAKAJIMA

IPC: H04B1/52 ,  H04B1/48 ,  H03H7/38 ,  H01P1/213 ,  H01P1/383

CPC classification number: H04B1/52 ,  H01P1/213 ,  H01P1/383 ,  H03H7/38 ,  H04B1/44 ,  H04B1/48 ,  H04B1/50 ,  H04W4/80

Abstract: A front end circuit includes a circulator having a first port into which a transmission signal is input, a second port into/from which a transmission/reception signal is input/output, and a third port from which a reception signal is output. The impedance of the second port of the circulator is set to a value different from the impedance value of the first port and the third port. With his configuration, the narrowing of a frequency band and the increase in loss, which occur when an impedance matching circuit is additionally provided, are prevented.