Optimum design of radar pulses for stealth targets (time domain approach)

Abstract

Summary form only given. The principles of an optimum design method of radar nonsinusoidal pulses for stealth targets are presented. First we obtain the time-domain performance of the special absorber, which is used on the target. Using the results of this time-domain approach, we design an optimum pulse figure to maximize the reflected wave energy from the surface of the stealth target. This optimum pulse figure is not necessarily unique. We use a single-layer model of absorbing material, but this method can be generalized for multiple-layer absorbing materials. Also we assume that there is only attenuation during pulse propagation in absorbing material (there is no dispersion). We also show, for the same absorbing material structure and the same reflected energy as used by Mohamed (see IEEE Trans. EMC, vol.37, no.2, 1995), one can use nonsinusoidal radar pulses with larger time-width (narrow-band pulses). It is therefore necessary for time-width of the pulse to be less than the propagation delay time in the absorbing material. Finally, some optimum nonsinusoidal radar pulses are presented for some special applications of stealth targets.