US Patent Issued to Outdoor Wireless Networks on March 11 for "Enhanced directional couplers for massive MIMO antenna systems" (Chinese, American Inventors)

ALEXANDRIA, Va., March 12 -- United States Patent no. 12,249,749, issued on March 11, was assigned to Outdoor Wireless Networks LLC (Claremont, N.C.).

"Enhanced directional couplers for massive MIMO antenna systems" was invented by Huan Wang (Richardson, Texas), Jin Jiang (Shanghai), Qiaozhi Chen (Shanghai) and XiaoHua Hou (Richardson, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A directional coupler includes a primary transmission line electrically coupled in series between an input port and an output port of the coupler, and an asymmetric, meander-shaped, secondary transmission line, which is electrically coupled in series between a coupling port and an isolation port of the coupler. The secondary...