ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,916, issued on June 2, was assigned to California Institute of Technology (Pasadena, Calif.).

"Direct current-40 gigahertz coax-based cryogenic variable temperature load (VTL) with exceptional temporal response and linearity" was invented by Jacob W. Kooi (Pasadena, Calif.), Goutam Chattopadhyay (Pasadena, Calif.) and Austin Minnich (San Marino, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A variable temperature load (VTL) or noise source including a grounded coplanar waveguide (GCPW) comprising a first metallization patterned on a fused quartz substrate, the first metallization comprising a first end for connecting to a coaxial connector an...