ALEXANDRIA, Va., May 26 -- United States Patent no. 12,640,468, issued on May 26, was assigned to VALMONT INDUSTRIES INC. (Tucson, Ariz.).
"Low-PIM cellular base station antenna concealments utilizing low-PIM fasteners" was invented by Alexander Oberman (Tucson, Ariz.) and Mark R. Schmidt (Tubac, Ariz.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Cellular base station antenna concealments, such as palm and tree concealments, utilize artificial branches with nonmetallic (e.g., polymeric) fasteners to avoid loose metal-to-metal connections to mitigate the generation of passive intermodulation (PIM) interference by the branches. Representative embodiments include "palm concealments" with low-PIM artificial pa...