ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,409, issued on March 25.
"Harmonic load pull tuner" was invented by Christos Tsironis (Kirkland, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A low profile four probe harmonic load-pull slide screw impedance tuner uses four tuning probes sharing the same slabline; they are inserted in pairs diametrically at fixed depth (distance from the center conductor) from both sides into the channel and move only horizontally along the slabline. The tuner does not have adjustable vertical axes controlling the penetration of the tuning probes and its low profile is optimal for on-wafer operations with direct wafer probe contact. The carriages holding t...