Abstract: The microwave imaging of two dimensional targets is discussed in this paper.By volume equivalence principle, a system of integral equations is obtained. They link the media's permittivity and conductivity with scattering field and total field. Then, the inversion equation is obtained after taking variation on these integral equations. Some properties including the converging speed, inversion accuracy and its ability to inverse complex targets are investigated. The effect of random noise is also discussed in this pa-per.

Key words: two dimensional targets, microwave imaging, variation, random noise