High-Frequency Electromagnetic Propagation/Scattering Codes
Final rept. 1 Apr 2003-31 Dec 2005
MONOPOLE RESEARCH THOUSAND OAKS CA
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The objective of our effort was to develop computational methods for constructing high-frequency asymptotic solutions in scattering on perfectly conducting objects. The emphasis of the first stage of our work was to describe high frequency phenomena in terms of numerically implemented evolution of wavefronts associated with the propagating waves. The wavefront evolution algorithm is implemented for the leading high frequency mechanisms including free-space propagation, reflection on smooth surfaces, wave-front splitting at the shadow boundary, generation and propagation of edge diffracted wavefronts, and surface wave propagation. The second stage of our work was directed towards developing novel fast rigorous direct or iterative solution methods based on construction of economical parameterization of high frequency solutions in terms of basis functions defined on large supports. The wavefront evolution technique developed in the first stage provides a numerical prescription for the selection and determination the parameters of the postulated analytical representation of such basis functions. The numerical prescription together with numerical tools constructed during this effort will constitute an important element of the planned future, high frequency solution technique employing basis functions defined on large supports.
- Electricity and Magnetism
- Radiofrequency Wave Propagation