Founded in Cleveland in 2006, Teraphysics is an R&D company developing and commercializing patented, miniaturized millimeter-wave traveling-wave-tube amplifiers. Its business-card-sized devices are designed to deliver tens to hundreds of watts of linear power across frequencies from roughly 70 to 650 GHz, supporting advanced communications and electromagnetic-spectrum applications. The company’s technology grew from work by former NASA engineers and physicists who collaborated at NASA Lewis, now NASA Glenn, in the 1990s.