Bistatic Radar Imaging of Impedance-Type Objects

A new approach to fixed-frequency bistatic radar, recently developed for imaging perfectly conducting scatterers, is extended to impenetrable impedance-boundary objects. The effect of limitations, imposed on both bistatic and projection angles, is also addressed. A linear non-iterative algorithm, based on the ideas of microlocal analysis, is applied to the far field pattern in order to recover the shape of objects with capacitive- or inductive-type impedances. Scalar two-dimensional formulation with TM polarized incident wave is explored. Numerical simulations confirm the validity of the approach, even under the conditions of strong scattering.