In this paper we propose a technique for including UTD surface diffracted fields which are diffracted from curved convex objects into a multilevel fast multipole implementation (MLFMM) of the Finite Element Boundary Integral method. We use Non-Uniform Rational B-splines (NURBS) representation for efficiently describing arbitrarily shaped objects. The dyadic Green's function associated with UTD field scattered by these convex curved object is determined using a high frequency ray-based method and then inserted at the various levels of the MLFMM. Results show that the proposed hybrid MLFMM-FEBI-UTD technique for convex object allows a significant reduction in memory storage and computational effort, preserving however the accuracy in the field estimates.

Balasubramanian, M., Toccafondi, A., Maci, S. (2014). Including high-frequency surface diffraction in a hybrid FEBI-MLFMM-UTD method. In 2014 8th European Conference on Antennas and Propagation (EuCAP 2014) (pp.2603-2606). New York : Institute of Electrical and Electronics Engineers Inc. [10.1109/EuCAP.2014.6902354].

Including high-frequency surface diffraction in a hybrid FEBI-MLFMM-UTD method

Toccafondi A.
;
Maci S.
2014-01-01

Abstract

In this paper we propose a technique for including UTD surface diffracted fields which are diffracted from curved convex objects into a multilevel fast multipole implementation (MLFMM) of the Finite Element Boundary Integral method. We use Non-Uniform Rational B-splines (NURBS) representation for efficiently describing arbitrarily shaped objects. The dyadic Green's function associated with UTD field scattered by these convex curved object is determined using a high frequency ray-based method and then inserted at the various levels of the MLFMM. Results show that the proposed hybrid MLFMM-FEBI-UTD technique for convex object allows a significant reduction in memory storage and computational effort, preserving however the accuracy in the field estimates.
2014
9788890701849
Balasubramanian, M., Toccafondi, A., Maci, S. (2014). Including high-frequency surface diffraction in a hybrid FEBI-MLFMM-UTD method. In 2014 8th European Conference on Antennas and Propagation (EuCAP 2014) (pp.2603-2606). New York : Institute of Electrical and Electronics Engineers Inc. [10.1109/EuCAP.2014.6902354].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1035009