Bistatic radars may be built in some configurations to work in a fence-like manner, detecting targets that pass between the transmitter and receiver with the bistatic angle being close to 180 degrees. This particular type of bistatic radar is known as a forward scatter radar, named for the process by which the target disperses the transmitted energy. As an aircraft’s radar cross section (RCS) is solely determined by the plane’s silhouette as seen by the transmitter and is unaffected by stealth coatings or shapings, forward scattering can be modelled using Babinet’s principle. This scattering can be used as a potential countermeasure to stealth aircraft.
