Radar Cross-Section Formulation of a Shell-Shaped Projectile Using Modified PO Analysis

Mohammad Asif Zaman,Md Abdul Matin

doi:10.1155/2012/328321

Abstract

A physical optics based method is presented for calculation of monostatic Radar Cross-Section (RCS) of a shell-shaped projectile. The projectile is modeled using differential geometry. The paper presents a detailed analysis procedure for RCS formulation using physical optics (PO) method. The shortcomings of the PO method in predicting accurate surface current density near the shadow boundaries are highlighted. A Fourier transform-based filtering method is proposed to remove the discontinuities in the approximated surface current density. The modified current density is used to formulate the scattered field and RCS. Numerical results are presented comparing the proposed method with conventional PO method. The results are also compared with published results of similar objects and found to be in good agreement.

Highlights

Prediction and measurement of Radar Cross-Section (RCS) have been a significant area of research for scientists and engineers for many years
This paper presents a detailed description and procedure of RCS calculation method of an object using physical optics (PO) method and modified PO method
In addition to the complete calculation procedure, this paper presents a new modified PO method

Summary

Introduction

Prediction and measurement of Radar Cross-Section (RCS) have been a significant area of research for scientists and engineers for many years. Radar engineers are developing more sensitive radars that can detect low RCS targets In both cases, accurate numerical simulation methods are essential for design purposes. Some variants of MoM have been developed for monostatic RCS formulation [7, 8] and other scattering related problems [9] These methods do not depend on the geometry and can be used for any arbitrary shaped objects. The paper concentrates on RCS formulation of a specific shell-shaped radar target, the analysis procedure is general and can be applied to objects of any geometry. The PO method approximates the induced surface current on the radar target and uses this current to calculate the scattered field [11, 19].

Geometrical Modeling

RCS Formulation Using Modified PO Method

Numerical Results

Conclusion