The Method of Equivalent Dipole Moments (MEDM) - a Novel CBFM Approach for the Fast and Accurate Solution of Dielectric-Scattering Problems
Paper i proceeding, 2011

High-resolution basis functions are em- ployed for accurate modelling of electromagnetic scattering from dielectric objects. It is shown that the field radiated by each of these micro basis func- tions resembles the dipole field, even in the imme- diate vicinity of its cubic support. This, in turn, significantly eases the computational burden of gen- erating the off-diagonal elements of the moment matrix. Furthermore, the on-diagonal self-term is known analytically and only governed by the electro- static field (electrodynamic part is negligible). This method has been hybridised with the Characteris- tic Basis Function Method (CBFM) and the Adap- tive Cross Approximation (ACA) algorithm to re- duce both the size and generation time of the mo- ment matrix equation. It is demonstrated that the proposed method, herein referred to as MEDM, is not only fast and memory efficient but it also gener- ates an accurate solution of scattering problems as- sociated with complex-shaped, thin and electrically large objects.

Electrically large objects

Scattering problems

Electrostatic field

Basis functions


Dipole fields

Matrix algebra

Electromagnetic scattering

Generation time

Matrix equations

Characteristic basis function methods

High resolution


Approximation algorithms


Off-diagonal elements

Computational burden

Dielectric scattering

Adaptive cross approximation algorithms

Memory efficient

Dielectric objects


Muhammad Naeem

Chalmers, Signaler och system

Rob Maaskant

Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk

D. kant

Netherlands Institute for Radio Astronomy (ASTRON)

Per-Simon Kildal

Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk

R. Mittra

Pennsylvania State University

Proceedings - 13th International Conference on Electromagnetics in Advanced Applications, ICEAA'11, Torino, 12-16 September 2011, s. 1013-1016

1013-1016 6046482
978-161284978-2 (ISBN)


Informations- och kommunikationsteknik


Elektroteknik och elektronik





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