Stability, Accuracy, and Robustness of the Time Domain Integral Equation Method for Radar Scattering Analysis

Stability, Accuracy, and Robustness of the Time Domain Integral Equation Method for Radar Scattering Analysis

Van 't Wout, E.

Vuik, C. (promotor)

Electrical Engineering, Mathematics and Computer Science

Delft Institute of Applied Mathematics

2013-11-11

The aim of this thesis is to design a computational method that can be used in modern stealth technology. In particular, the computational method should be capable to simulate scattering of ultra-wideband radar signals for military aircraft constructed with ferromagnetic radar absorbent materials. A full-wave boundary element method has been chosen because of its efficiency for electromagnetic scattering of electrically large structures. A time-domain method has been chosen because wideband signals can be simulated with a single run. Moreover, the future use of nonlinear constitutive equations for ferromagnetic materials requires simulation in time domain. To this end, the Time Domain Integral Equation (TDIE) method is used as computational method. More specifically, the numerical discretization of the Electric Field Integral Equation (EFIE) is given by the Marching-on-in-Time (MoT) scheme, which has been chosen because of its efficiency and accuracy. Instabilities prevent its industrial application to stealth technology, even for smallband and linear constitutive equations. In this thesis, a thorough numerical analysis on stability, accuracy, and robustness has been derived, resulting in clear guidelines for the choice of numerical parameters. Consequently, stable computer simulations have been achieved.

radar scattering
computational electromagnetics
boundary element method
integral equation method
time domain
numerical analysis
stability
accuracy
robustness

https://doi.org/10.4233/uuid:25fbc401-50f7-42a5-ac2c-2b4e0e00dc10

2013-11-11

9789462034631

Institutional Repository

doctoral thesis

(c) 2013 Van 't Wout, E.