Development of New Methods for Predicting the Bistatic Electromagnetic Scattering from Absorbing Shapes
Abstract
More accurate, reliable and efficient methods to calculate the bistatic scattering of electromagnetic fields from absorbing dielectric fields from absorbing dielectric objects have been developed. While solution of three dimensional scattering problems has not been achieved, the methods developed provide, for the first time, finite element solutions of closed three- dimensional electromagnetic fields free of the spurious solutions that have plagued previous procedures. These stable finite elements are defined in three varieties: 1) mixed-order rectangular parallelepiped elements, 2) edge-based tangential vector finite elements, and 3) derivative continuous elements. Each is shown to give only physically correct solutions. A new procedure, called the transfinite element method, is also presented for solution of open or unbounded electromagnetic scattering problems. This method provides a one step procedure to compute scattered fields in electromagnetics. The transfinite element method is applied only in two dimensions. Finally, a new high efficiency algorithm is proposed to compute electromagnetic scattering over a specified frequency range. In this algorithm, frequencies are selected adaptively to ensure a given accuracy in minimum computation time for the specified frequency range. The individual procedures are illustrated with a variety of examples.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1990
- Accession Number
- ADA219327
Entities
People
- D. Hudak
- D. Q. Sun
- J. F. Lee
- Z. J. Cendes
Organizations
- Carnegie Mellon University