German companies Rohde & Schwarz , ESG and aerospace Defence have signed an agreement to further develop a radio , radar , acoustic and optical command and control system called drone . The system , which was used to protect the G-7 Summit in southern Germany in 2015 , can detect the presence of drones in the surrounding airspace and pose threats including shutting down radio frequency bands , jamming GPS signals or releasing high - powered electromagnetic waves to disrupt an aircraft 's electronics .
German companies Rohde & Schwarz, ESG and Diehl Defence have signed an agreement to further develop a radio, radar, acoustic and optical command and control system called Guardion. The system, which was used to protect the G-7 Summit in southern Germany in 2015, can detect the presence of drones in the surrounding airspace and issue countermeasures including shutting down radio frequency bands, jamming GPS signals or releasing high-powered electromagnetic pulses to destroy an aircraft's electronics.