Extended equivalent source technique with underdetermined sources.

摘要

The Extended Equivalent Source Technique (EEST) is a method of computing electromagnetic scattered fields from discrete equivalent sources which lie some distance away from a surface where a boundary condition is enforced. Possible sources include electric and/or magnetic multipoles and current filaments. Kennaugh extended a spherical multiple solution to nonspherical geometries via a matrix equation. Generally the number K of unknown complex source amplitudes is taken equal to the number I of known complex boundary conditions. However, one can inquire whether there is any advantage to utilizing more unknown sources than there are boundary conditions and solving their amplitudes by a renormalization, maximum likelihood, or maximum entropy procedure. Here we consider a Gibbs' maximum entropy method appropriate for complex data processing if I < K/2. 1 fig., 2 refs.