 In May 2018, researchers from the Institute of Aerospace Engineering at Technische Universität Dresden, Germany, concluded that the dominant effect underlying the apparent thrust could be clearly identified as an artifact caused by Earth's magnetic field interacting with power cables in the chamber, a result that other experts agree with.In 2001, Shawyer founded "Satellite Propulsion Research Ltd", in order to work on the EmDrive, a drive that he said used a resonant cavity to produce thrust without propellant.The company was backed by SMART award grants from the UK Department of Trade and Industry.