Modeling the Physical Optics Currents in a Hybrid Moment-Method-Physical-Optics Code

Jose Manuel TABOADA  Fernando OBELLEIRO  Jose Luis RODRIGUEZ  Jose Oscar Rubiños LOPEZ  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E84-C   No.9   pp.1207-1214
Publication Date: 2001/09/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electromagnetic Theory
Keyword: 
moment method (MM),  physical optics (PO),  hybrid methods,  expansion functions,  

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Summary: 
This paper shows a comparison between several procedures to represent the Physical Optics (PO) current density into a hybrid Moment-Method-Physical-Optics (MM-PO) code. Some numerical results demonstrate that a set of basis functions suitable for the Method of Moments (MM) may be inappropriate to model the PO currents. A new evaluation of the PO operator is proposed. The radiation can be analytically determined and, since it includes a linear interpolation of the phase, it can be applied over large triangular domains. This allows a drastic reduction of the computational cost, maintaining or even improving the level of accuracy.