ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,451,575, issued on Oct. 21.
"Magnetless cryogenic circulator" was invented by Navjot Kaur Khaira (Kanata, Canada), Tejinder Singh (Kanata, Canada), Mehran Golcheshmeh (Waterloo, Canada) and Raafat Rezk Mansour (Waterloo, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A magnetless cryogenic circulator is developed that has three identical resonators in three branches. Each branch connects two ports and each resonator has a capacitor connected across a tunable inductor. A set of tunable inductors modulated with modulation signals that have a relative phase of 0deg, 120deg and 240deg provided through a circuit. A microstrip delay line for providing ...