ALEXANDRIA, Va., June 5 -- United States Patent no. 12,278,430, issued on April 15, was assigned to Outdoor Wireless Networks LLC (Richardson, Texas).
"Antenna calibration device" was invented by Bo Wu (Suzhou, China), Ligang Wu (Suzhou, China), Runmiao Wu (Suzhou, China) and Jian Zhang (Suzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A coupling device includes a plurality of couplers. Each coupler includes a transmission main line and a coupling subline. The transmission main line is used for providing an input end and an output end. The coupling subline is coupled with the transmission main line to provide two coupling ends. The coupling subline includes two first parts located on opposite sid...