ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,732,164, issued on Sept. 8.
"VHF-UHF harmonic load pull tuner" was invented by Christos Tsironis (Kirkland, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A new harmonic slide screw impedance tuner for VHF-UHF frequencies uses a reduced overall length spiral slabline structure and three rotating carriages allowing reducing the linear size of the tuner from originally L=3Lambda/2 to a spiral length L=2PiRN of a cylinder with 2R diameter and a height H made up of N floors (example: F=100 MHz, Lambda=300 cm, R=10 cm, N=10 floors of 2 cm each, yields a 20x20 cm cylinder versus a 450 cm linear slabline; a core reduction of 450/20=23). The slabline sta...