ALEXANDRIA, Va., April 21 -- United States Patent no. 12,609,656, issued on April 21, was assigned to Sumitomo Electric Industries Ltd. (Osaka, Japan).
"Doherty amplifier" was invented by Hirotaka Asami (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A Doherty amplifier includes a distributor, a first amplifier, a second amplifier, a third node, an impedance conversion circuit having a first end connected to a first node and a second end connected to the third node, and rotating an impedance viewed from the first amplifier to the third node with respect to an impedance viewed from the first amplifier to the first node within a range of 360degplus-minus45deg on a Smith chart in a second harmonic ...