公开(公告)号：US10608694B2

公开(公告)日：2020-03-31

申请号：US16451522

申请日：2019-06-25

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideki Muto

IPC: H04B1/38 ,  H04B1/525 ,  H03F3/189 ,  H03H7/38

Abstract: A high-frequency module (20) includes a reception-side filter (21) that uses a first frequency band as a pass band and a second frequency band as an attenuation band, an LNA (23), and a matching circuit (22) disposed between the reception-side filter (21) and the LNA (23). In a Smith chart, the matching circuit (22) makes an interval between impedance in the second frequency band of the reception-side filter (21) and a second gain circle center point indicating impedance at which gain in the second frequency band of the LNA (23) is maximized greater than an interval between impedance in the first frequency band of the reception-side filter (21) and a first gain circle center point indicating impedance at which gain in the first frequency band of the LNA (23) is maximized.

公开(公告)号：US10797741B2

公开(公告)日：2020-10-06

申请号：US16435645

申请日：2019-06-10

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yusuke Naniwa ,  Hideki Muto

IPC: H04L5/12 ,  H04B1/12 ,  H04B1/10 ,  H04B1/16 ,  H04B1/525 ,  H04B1/00 ,  H01P1/203 ,  H01P5/02 ,  H01P7/08

Abstract: A radio frequency module includes a first receive circuit that processes a receive signal in the first frequency band. The first receive circuit includes a first substrate, a first low noise amplifier, and a first filter circuit. The first low noise amplifier is mounted on a principal surface of the first substrate. The first filter circuit is connected to an output end of the first low noise amplifier. At least a portion of the first filter circuit is provided on the principal surface of the first substrate. The first filter circuit attenuates spurious components occurring due to a transmit signal in the first frequency band received by the first low noise amplifier. The spurious components are included in the transmit signal in the first frequency band and have a frequency bandwidth that overlaps, includes, or is included in the frequency bandwidth of the receive signal in the second frequency band.