Abstract: Firstly the scattering integral equation for a two dimensional impedance strip is presented, then surface current density is solved via the method of moments, and lastly its scattering pattern is predicted. By this method, the characteristic of electromagnetic scattering of different impedance distribution strips is analysed; the impedance distribution function for greatly reducing edge scattering and an optimal model of the impedance taper material are presented. It is helpful to the design of radar absorbing materials.

Key words: radar cro ss sect ion, radar abso rbing material, impedance st rip, method of moment