Accession Number : ADA000285


Title :   A Surface Formulation for Characteristic Modes of Material Bodies


Descriptive Note : Technical rept. no. 2


Corporate Author : SYRACUSE UNIV NY DEPT OF ELECTRICAL AND COMPUTER ENGINEERING


Personal Author(s) : Chang, Yu ; Harrington, Roger F


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a000285.pdf


Report Date : Oct 1974


Pagination or Media Count : 126


Abstract : A theory of characteristic modes for material bodies is developed using equivalent surface currents. This is in contrast to the alternative approach using induced volume currents. The mode currents form a weighted orthogonal set over the material body surface, and the mode fields form an orthogonal set over the sphere at infinity. The characteristic modes of material bodies have most of the properties of those for perfectly conducting bodies. Formulas for the use of these modes in electromagnetic scattering problems are given. A procedure for computing the characteristic modes is developed, and applied to two-dimensional bodies. Illustrative examples of the computation of characteristic currents and scattering cross sections are given for cylinders of different material constants.


Descriptors :   *ELECTROMAGNETIC SCATTERING , COMPUTER PROGRAMS , ELECTROMAGNETIC FIELDS , POLARIZATION , MATRICES(MATHEMATICS) , DIELECTRICS , CYLINDRICAL BODIES , GRAPHICS , ELECTRIC CURRENT , MAGNETIC MATERIALS , CURVE FITTING


Subject Categories : Electricity and Magnetism
      Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE