ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,482,949, issued on Nov. 25, was assigned to KEYSIGHT TECHNOLOGIES INC. (Santa Rosa, Calif.).

"Variable gain horn" was invented by Gregory S. Lee (Mountain View, Calif.) and Gregory Eng (Santa Clara, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A variable gain horn and a system for testing an antenna with the variable gain horn is disclosed. The variable gain horn includes a horn adapted to transmit electromagnetic signals to an antenna under test. The horn is adapted to have a diverging lens attached and detached without fasteners at its distal end of the horn by a form fit. When the diverging lens is not attached, the variable gain horn transm...