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1887

Scattering from a corrugated surface

Scattering from a corrugated surface

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Sea Clutter: Scattering, the K Distribution and Radar Performance — Recommend this title to your library

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This chapter will be long and perhaps overburdened with technical detail. Possibly as a result of this, it should provide a reasonably thorough introduction to the theory of EM scattering in the LGA regime that is particularly pertinent to the discussion of sea clutter. The reader who wishes to carry out controlled calculations of this kind, and to interpret their output sensibly, has no alternative but to study their theoretical background in some depth. Much of the relevant material is spread throughout the physics and engineering literature and is expressed in a variety of notations. It is hoped that, by focussing our attention on the less general scalar formulation of the problem, we will be able to lead the reader through the finer points of the theory and its implementation, and elucidate details too often omitted in articles in the literature, without incurring an unacceptable overhead of formulaic obfuscation. The authors sincerely hope that they can succeed in achieving this aim, as they remember only too well the difficulties they experienced when encountering this material for the first time.

Chapter Contents:

  • 17.1 The integral formulation of the scalar scattering problem
  • 17.2 Helmholtz equation Green's functions in two and three dimensions
  • 17.3 Derivation of the Fresnel formulae
  • 17.4 Approximate decoupling of the integral equations: the impedance boundary condition
  • 17.5 Scattering by a perfectly conducting surface
  • 17.5.1 The physical optics or Kirchoff approximation
  • 17.5.2 Small height perturbation theory: PC case
  • 17.5.3 The half-space and reciprocal field formalisms
  • 17.6 Scattering by an imperfectly conducting surface: small height perturbation theory
  • 17.7 Numerical solutions of the scattering problem
  • 17.7.1 Scattering from a perfect conductor
  • 17.7.2 Scattering from an imperfect conductor; modification of the F/B method
  • 17.8 Incorporation of the impedance boundary condition in F/B calculations
  • 17.9 Evaluation of adjunct plane contributions
  • 17.10 Summary
  • References

Inspec keywords: clutter; electromagnetic wave scattering

Other keywords: corrugated surface; LGA regime; EM scattering; scalar formulation; formulaic obfuscation overhead; physics literature; engineering literature; sea clutter

Subjects: Electromagnetic wave propagation; Electromagnetic waves: theory

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