A novel strip representation of flat plate is proposed for the bistatic radar cross section (RCS) analysis. Direction of every strip is determined so that the Keller cone at any point may include the observer. A unique set of strips are determined for given directions of incidence and observer. This method is capable of covering all the directions of observer including that of specular reflection. The high accuracy of this method is demonstrated by comparing it with the exact or the moment method solutions for diffraction from a flat disk and a square plate.