Abstract
The hybrid method of moments and physical optics (MOM-PO) based on nonuniform rational B-spline (NURBS) modeling represented a suitable approach for dealing with electromagnetic (EM) radiation problems because of its higher efficiency and more accurate modeling than Triangle MOM-PO method.However, the invalidation in existing NURBS MOM-PO method occurs when the distance between antenna and scatterer is less than one wavelength. The reason is analyzed in detail in this article. This article introduces an improved NURBS MOM-PO method to overcome this problem. Ludwig integral combining with stationary phase method is utilized to calculate the integral of PO currents. Thus, both the efficiency and validity are ensured. Numerical results demonstrate that accurate results can be achieved efficiently in electrically large EM radiation problems by using the present method. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2675–2679, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25569
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