Mesure de la retrodiffusion d'objets tridimensionnels par la methode impulsionnelle

After a short review of the non cooperative target reconnaissance problem and a sketch of the most promising related technologies, this paper describes the Time Domain Scattering Range (TDSR) that has been developped at the Royal Military Academy Brussels for measuring the electromagnetic signature of 3D-targets. In contrast with the conventional frequency domain method, the TDSR method does not need an expansive anechoic chamber, because it can be installed in any room of sufficient dimensions. The original feature of the method is that the impulse backscattering of the body is measured directly in the time-domain by means of a fast pulse generator, a special conical antenna and an ultra-broadband digitizing oscilloscope (20 GHz bandwidth).