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A review of high-frequency radar cross section analysis capabilities at McDonnell Douglas Aerospace

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4 Author(s)
Elking, D.M. ; McDonnell Aerospace, St. Louis, MO, USA ; Roedder, J.M. ; Car, D.D. ; Alspach, S.D.

Two basic types of physical-optics (PO)-based radar cross section (RCS) analysis codes have come to maturity in today's HF electromagnetic analysis environment. These are facet based and curved surface based codes. Facet codes have very fast analysis rates, while curved-surface codes are usually considered more accurate. At McDonnell Douglas Aerospace (MDA), the need for very reliable RCS results to guide the aircraft design process has led us to develop a curved surface based high-frequency code. This code is called CADDSCAT (computer-aided design drafting scattering). Various aspects of CADDSCAT's curved surface and facet based analysis capabilities are described and compared. Topics covered include the genesis of curved surface based PO techniques, a discussion of first-bounce PO computations, and multiple-bounce PO interactions. CADDSCAT's first-bounce and multiple-bounce PO algorithms include options for treating radar absorbing materials (RAM). The CPU needs for the ray-tracer algorithms, for curved and faceted models, are compared. Gap diffraction, resistive-card modeling, and sea-surface modeling are briefly discussed

Published in:

Antennas and Propagation Magazine, IEEE  (Volume:37 ,  Issue: 5 )