Stepped frequency continuous wave GPR unit for unexploded ordnance and improvised explosive device detection

Numerous recent local military conflicts made it clear, that even after the ceasefire, theatre of war can still be a dangerous place for civilians. When unexploded ordnance is considered, it can be detected by traditional metal detectors, but improvised explosive devices might cause a lot of problems for such sensors, as they may be constructed with little to no metal elements. In order to detect both of aforementioned objects authors suggest using a ground penetrating radar. In the paper a stepped frequency continuous wave unit, manufactured by the authors, along with few selected measurements in laboratory and outdoor conditions were described.