ALEXANDRIA, Va., July 16 -- United States Patent no. 12,671,162, issued on June 30, was assigned to Nanning FuLian FuGui Precision Industrial Co. Ltd. (Nanning, China).
"Branch-line coupler" was invented by Yu-Chih Chueh (Hsinchu, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A branch-line coupler includes an input port, arranged on a bottom layer of the substrate; an isolated port, arranged on the bottom layer; a first output port, arranged on a top layer of the substrate; a second output port, arranged on the top layer; a ground layer, arranged in a middle layer of the substrate; a first transmission line, connected between the input port and the isolation port; a second transmission line, connecte...