ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,528, issued on March 17, was assigned to Luminar Technologies Inc. (Orlando, Fla.).

"Unidirectional, asymmetric, e-skid, waveguide grating antenna" was invented by Aditya Jain (Minneapolis) and Li-Yuan Chiang (San Diego).

According to the abstract* released by the U.S. Patent & Trademark Office: "A waveguide grating antenna apparatus includes a substrate layer, a lower waveguide array layer upon the substrate, and an upper waveguide array layer positioned above the lower waveguide array layer. The lower waveguide array layer is composed of a plurality of first waveguides extending axially and a plurality of second waveguides extending axially and arranged in parallel and alterna...