ALEXANDRIA, Va., July 16 -- United States Patent no. 12,671,159, issued on June 30, was assigned to Lockheed Martin Corp. (Bethesda, Md.).

"Multiband piston polarizer waveguide assembly including coaxially configured inner and outer waveguide cavities" was invented by Jason Stewart Wrigley (Littleton, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided herein are various enhancements for radio frequency feed structures for waveguide-fed antenna systems. A waveguide structure includes an outer waveguide cavity comprising radial ports and an outer aperture, and disposed coaxially about a piston polarizer element housing an inner waveguide cavity. The piston polarizer element comprises longitudinal ri...