ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,525,728, issued on Jan. 13, was assigned to Huawei Technologies'Co.'Ltd.' (Shenzhen, China).
"Antenna apparatus and communication device" was invented by Chao Ren (Segrate, Italy), Dingjiu Daojian (Dongguan, China), Weihong Xiao (Dongguan, China) and Guoqing Xie (Dongguan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An antenna apparatus is provided to include a reflection plate, a radiating element disposed on the reflection plate and including a balun and at least two radiation arms, and a feeding network including a phase shifter. The balun includes a first feeding layer, a common ground layer, and a second feeding layer disposed in sequence....