公开(公告)号：US20140169422A1

公开(公告)日：2014-06-19

申请号：US14182640

申请日：2014-02-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hisao HAYAFUJI ,  Koji FURUTANI

IPC: H04B1/40

CPC classification number: H04B1/40 ,  H03H7/40 ,  H03H7/465 ,  H04B1/0057 ,  H04B1/48

Abstract: A high frequency front end module includes a variable circulator, a transmission side filter, and a reception side filter. Capacitors that are to be selectively connected by a switch are provided between an antenna side port and a transmission side port of a circulator of the variable circulator. Capacitors that are to be selectively connected by a switch are provided between the antenna side port and a reception side port of the circulator. Capacitors that are to be selectively connected by a switch are provided between the transmission side port and the reception side port of the circulator. By selecting the capacitors, phase characteristics between the ports are adjusted to the characteristics in accordance with a transmission signal and a reception signal to be transmitted.

Abstract translation: 高频前端模块包括可变环路器，发送侧滤波器和接收侧滤波器。 通过开关选择性地连接的电容器设置在可变循环器的环行器的天线侧端口和发送侧端口之间。 通过开关选择性地连接的电容器设置在天线侧端口和循环器的接收侧端口之间。 通过开关选择性地连接的电容器设置在循环器的发送侧端口和接收侧端口之间。 通过选择电容器，根据要发送的发送信号和接收信号，将端口之间的相位特性调整为特性。