RCS Computation of Airplane Using Parabolic Equation

Abstract

Abstract-The accurate analysis of scattering from objects with dimensions large compared to the wavelength using rigorous methods (finite element, FDTD, method of moments) with a personal computer is almost impractical. In asymptotic methods, physical optics (PO), geometrical theory of diffraction (GTD), the accurate modeling of the object's boundary is too cumbersome. The parabolic equation method gives accurate results in calculation of scattering from objects with dimensions ranging from one to tens of wavelengths. Solving parabolic equation with the marching method needs limited computer storage even for scattering calculations of large targets. In this paper, first the calculation procedure of radar cross section using parabolic equation in three dimension is studied and the necessary equations are derived. In order to show the validity of the parabolic equation, the RCS of a conducting sphere is calculated and the results are compared with analytic results. The airplane RCS has been computed by using a staircase model in the parabolic equation and the results are compared with physical optics results.

Design of Multi-Layer Radar Absorbing Coating and Transparent Shielding Film for RCS Reduction of Complex Targets

“…In a shaping technique, the surfaces of an object or platform are designed to reflect or diffract incident waves in directions away from the radar. However, modifications of objects such as aircrafts or ships are usually limited to certain aerodynamic principles [3], and the probability of detection from bistatic radar may therefore be increased [4,5]. The second technique, the use of RAMs, has been widely used in military applications to reduce the amount of energy reflected back to the radar by means of absorption.…”

Broadband multilayer radar absorbing coating for RCS reduction

“…In a shaping technique, the surfaces of an object or platform are designed to reflect or diffract incident waves in directions away from the radar. However, modifications of objects such as aircrafts or ships are usually limited to certain aerodynamic principles , and the probability of detection from bistatic radar may therefore be increased .…”

Fast Large RCS Calculation Using the Boundary Element Method

“…In the last 20 years, owing to the impressive development in computer technology and to the introduction of fast methods which require less computational cost and memory resources, a fast and accurate prediction of the Radar Cross Section (RCS) of arbitrarily shaped 3D objects like aircrafts has become possible (see [4,5,11]). Until the emergence of high-performance computers in the early eighties, this type of computation was afforded by using approximate high frequency techniques such as the shooting and bouncing ray method [9].…”