ALEXANDRIA, Va., June 10 -- United States Patent no. 12,294,338, issued on May 6, was assigned to MURATA MANUFACTURING Co. LTD. (Kyoto, Japan).
"Output matching circuit and power amplifier circuit" was invented by Hitoshi Akamine (Kyoto, Japan) and Masatoshi Hase (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An output matching circuit includes: a converter electrically connected to an output end of a power amplifier element to convert an impedance of the output end to an impedance higher than the impedance of the output end by magnetic coupling; and a first filter circuit electrically connected between the output end of the power amplifier element and the converter to make a short circuit in a...