Bistatic ultra-wideband SAR for imaging of ground targets under foliage

Bistatic SAR is compared with monostatic SAR concerning, e.g. coherent integration time and spatial resolution. We also suggest that bistatic SAR may be used to suppress background clutter, e.g. when the clutter scattering is dominated by dihedral or trihedral scattering mechanisms. This idea is applied to the problem of detecting concealed vehicles in foliage using VHF-band SAR. Electromagnetic simulations show that the vehicle-to-clutter ratio can dramatically increase by choosing different incidence angles for the transmitter and receiver in a bistatic SAR.