Abstract
This paper presents an extension over a novel, three dimensional high frequency method for the calculation of the scattered electromagnetic (EM) fleld from a Perfect Electric Conductor (PEC) plate, which is based on the Physical Optics (PO) approximation and the Stationary Phase Method (SPM). This extension deflnes a new analytical method which is proved to be very e-cient in computer execution time and enhances the accuracy of its predecessor around the area of the main scattering lobe. This new analytical method accomplishes high accuracy through the use of higher order approximation terms, which imply the use of Fresnel functions (SPM- F method). By using higher order Fresnel approximation terms, no impact on the time e-ciency of the SPM method appears to
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