公开(公告)号：US20200014363A1

公开(公告)日：2020-01-09

申请号：US16028816

申请日：2018-07-06

申请人： Futurewei Technologies, Inc.

发明人： Huairen YI ,  Zhengxiang MA

IPC分类号： H03H7/48 ,  H03H7/18

摘要： A branch line coupler and active antenna system are provided. In an embodiment, the branch line coupler comprises four resonators. The four resonators are formed by a body and a grounded element. A resonator comprises a capacitor element and an inductor element. A first portion of the capacitor element comprises at least a portion of the body and a second portion comprises at least a portion of the grounded element. The inductor element is connected to the capacitor element in parallel. The inductor element comprises at least a portion of the body and extends to the grounded element. The first and second resonators are coupled by a first coupling, the second resonator and the third resonator are coupled by a second coupling, the third resonator and the fourth resonator are coupled by a second third coupling, and the fourth resonator and the first resonator are coupled by a fourth coupling.