Analysis of the diffracting centers of a complex 3-dimensional structure

Most radar cross section calculations are done on specific objects, with well known geometrical characteristics. This means that if one chooses to treat a different geometry, the theoretical considerations and simplifications will probably change, and so will the practical implementation. The authors develop a method, which treats three-dimensional objects of any shape. Special geometrical features like systematic modelling of the object, removal of the hidden faces, or the recognition of diffracting centres are done automatically. They only consider the monostatic radar cross section, examines objects of the size of an aircraft, and use frequencies from 10 to 40 GHz. This brings us in the optical region, and allows the use of high frequency asymptotic methods like physical optics (PO) for the reflections, and Michaeli´s (1988) equivalent current method (ECM) for the diffractions.