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Radar cross section computation of inhomogeneous scatterers using edge‐based finite element methods in frequency and time domains
Author(s) -
Mahadevan K.,
Mittra R.
Publication year - 1993
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/93rs00943
Subject(s) - radar cross section , finite difference time domain method , computation , finite element method , boundary (topology) , frequency domain , perfectly matched layer , time domain , cross section (physics) , mathematical analysis , enhanced data rates for gsm evolution , mathematics , geometry , acoustics , radar , computer science , physics , algorithm , optics , telecommunications , quantum mechanics , computer vision , thermodynamics
This paper presents a flexible, body‐conforming finite element modeling technique, using Whitney's edge and face basis functions, for efficient computation of radar cross section (RCS) of inhomogeneous scatterers, both in the frequency and time domains. The vector absorbing boundary conditions, originally developed for a spherical absorbing boundary, are generalized for planar and cylindrical boundaries. The computational resources required for the proposed frequency and time domain techniques for RCS computation are compared with those needed in the finite difference time domain (FDTD) and the nonorthogonal FDTD methods. Illustrative numerical results, that demonstrate the accuracy of the technique, are presented.