This Chapter examines the use of UWB signals (signals with the 100…300 MHz spectrum width confined within a VHF band) to enhance the non-cooperative radar identification of objects. Many radar books contain a classic figure showing the enhancement of the radar cross section (RCS) of a perfectly electrically conducting (PEC) sphere when the signal frequency falls in the Mie resonance region. This condition occurs when the ratio of the circumference to the wavelength lies between 1 and 10.