Study and Analysis of Bi-Static Radar Cross Section of a Stealth Aircraft

摘要

F-117 Nighthawk Stealth Fighter Jet is considered as the world's first true `Stealth' aircraft and its considerably low Radar Cross Section (RCS) has been measured in this paper. RCS is an important parameter for radar that improvises on the detectability the target accurately. Varying two of the most important parameters of RCS such as frequency of the radar transceiver and aspect angle, the best outputs are recorded as the results. Using COMSOL Multiphysics software a virtual chamber has been created and the CAD model of F-117A is applied in it. With a planar electric field as the incident radar signal, the RCS has been recorded. In this paper, the bi-static RCS calculation method is considered for simulation. The results clearly depicted that better RCS can be obtained at the upper order frequency of S band wave range (above 3.5 GHz) and at some specific aspect angles the results exhibit higher detectability.