Near-Field Radar Signature Modeling for EW/End-Game Simulations

摘要

The effectiveness of radar guided weapons can be compromised by a number offactors, such as target glint, engine modulation, clutter and electronic counter measures (ECM). In fact, many missile intercept failures often were attributed to these factors. Thus, effective weapon systems design must carefully consider these effects in order to avoid serious degradation of the weapon performance. By employing modeling and simulation, effective design can be achieved with relative ease and significant cost savings. For missile fuzing/ECM applications, the transmitting and receiving antennas on the missile are generally located in the near field zone of the scattered field from the target encountered. In consequence, the radar return computation is complicated by the partial target illumination, nonuniform antenna patterns, target material coatings, and engine inlet returns. Existing near field radar cross section (RCS) computation algorithms are typically based on first-order high frequency methods that do not account for multiple bounce and complex shadow effects. In particular, those algorithms cannot be used to calculate scattering from a cavity, such as an engine inlet or a sensor box. The cavity scattering, material coatings and engine