Electromagnetic Scattering and Radiation by Arbitrary Configurations of Conducting Bodies and Wires
Abstract
In recent years, researchers in electromagnetics have expended considerable effort capitalizing on computational advances made possible by new developments in computer technology. These advances have made it easier to develop highly efficient, specialized computer codes for many scattering or radiation problems. However, because of the high cost of developing a code for each specialized geometry, it has increasingly become more cost effective to use possibly less efficient, but more general purpose codes which apply to a broader class of problems. Most general purpose codes employ an integral equation formulation which is solved by the method of moments. Under this type of formulation, the structure geometry is usually modeled either as a wire mesh or as a surface subdivided into discrete planar patches. The wire grid geometry modeling approach has been sucessfully used where primarily far field quantities such as RCS or radiation patterns are of interest. Principal advantages of the wire grid approach are the geometry is easily specified for computer input, and only one-dimensional integrals need to be numerically evaluated in the method of moments. The wire grid modeling approach, however, often proves unsatisfactory where near field quantities such as surface currents or input impedance are desired. One obvious difficulty is in interpreting computed wire currents as equivalent surface currents.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1988
- Accession Number
- ADA200072
Entities
People
- D. R. Wilton
- S. U. Hwu
Organizations
- University of California, San Diego