US 11,870,125 B2
Branch-line coupler
Yu-Chih Chueh, New Taipei (TW)
Assigned to Nanning FuLian FuGui Precision Industrial Co., Ltd., Nanning (CN)
Filed by Nanning FuLian FuGui Precision Industrial Co., Ltd., Nanning (CN)
Filed on May 12, 2021, as Appl. No. 17/318,348.
Prior Publication US 2022/0368001 A1, Nov. 17, 2022
Int. Cl. H01P 5/22 (2006.01); H01P 5/18 (2006.01)
CPC H01P 5/227 (2013.01) [H01P 5/18 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A branch-line coupler, adapted to radio frequency circuits, comprising:
an input port;
a first output port;
a second output port;
an isolated port;
a first transmission line having two first open branches, electrically connected between the input port and the first output port;
a second transmission line having two second open branches, electrically connected between the isolated port and the second output port;
a first bent branch line, electrically connected between the input port and the isolated port; and
a second bent branch line, electrically connected between the first output port and the second output port, wherein the two first open branches and the two second open branches are fishbone-like structures.