ALEXANDRIA, Va., March 19 -- United States Patent no. 12,255,374, issued on March 18, was assigned to QUALCOMM Inc. (San Diego).
"Frequency selective coupler" was invented by Yu-Chun Liu (Altamonte Springs, Fla.), Xiaomin Yang (Longwood, Fla.) and Arjun Ravindran (Orlando, Fla.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A frequency selective coupler configured as a harmonic rejection filter includes an electromagnetic element configured to electromagnetically couple to a signal path between an output of a power amplifier and an antenna, an impedance network coupled between an isolated port of the coupler and ground, the impedance network configured to provide a harmonic filter response, and an electrical...