Accession Number : ADA260725


Title :   Dual-Surface Magnetic-Field Integral Equation Solution for Bodies of Revolution


Descriptive Note : Rept. for May 1988-Dec 1990


Corporate Author : ROME LAB HANSCOM AFB MA


Personal Author(s) : Schmitz, James L


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a260725.pdf


Report Date : Apr 1991


Pagination or Media Count : 66


Abstract : Conventional magnetic-field integral equations for perfectly conducting bodies introduce spurious resonances at the resonant frequencies of the Interior cavity formed by the scattering surface. Yielding unreliable results for bodies larger than about a wavelength across. The spurious resonances can be eliminated from the magnetic-field Integral equation by using the dual-surface magnetic-field Integral equation derived by Yaghjian. The dual- surface magnetic-field integral equation, although identical in form and comparable in complexity to the original magnetic-field integral equation, provides a unique solution for the surface current J at all frequencies. A computer program that computers the electromagnetic scattering from bodies of revolution using the dual-surface magnetic-field integral equation, has been developed. The numerical results obtained from the body of revolution program using the dual-surface magnetic-field integral equation for a sphere, two frustums, and a truncated circular cylinder are compared to those of the exact Mie solution, a wire-mesh computer code, and measurements, respectively.


Descriptors :   *MAGNETIC FIELDS , *RADAR CROSS SECTIONS , *INTEGRAL EQUATIONS , COMPUTER PROGRAMS , FREQUENCY , COMPUTERS , INTEGRALS , RADAR , SPHERES , MESH , RESONANT FREQUENCY , BODIES OF REVOLUTION , CIRCULAR , FRUSTUMS , SURFACES , PROBLEM SOLVING , CAVITIES , ELECTROMAGNETIC SCATTERING , WIRE , MEASUREMENT , SCATTERING


Subject Categories : Numerical Mathematics
      Active & Passive Radar Detection & Equipment
      Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE