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�������պ����ѧѧ�� 2008, Vol. 34 Issue (04) :373-376    DOI:
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Influence of pixels to graphical electromagnetic computing accuracy and its solution methods
Fang Xiang, Su Donglin, Liu Yan*
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� In graphical electromagnetic computing (GRECO), the image rendering resolution was adjusted to improve the physical optics (PO) integral evaluation accuracy. In the PO integral calculation, the visible scattering surface was approximated by flat panels at the pixel level. Therefore the PO integral was evaluated numerically by using a GRECO formula which is equal to the coherent addition of the contribution from all the pixels in the target image. The electrical size of screen cell per pixel was bounded with a maximum Nyquist spatial sampling interval, thus a GRECO image resolution determination criteria which meets the precision requirement of high-frequency RCS calculation was suggested, followed by an image resolution adjusting implementation. Illustrative numerical results for a canonical and a complex targets were presented, which demonstrate the validity of the GRECO image resolution determination criteria.
Keywords�� electromagnetic scattering   physical optics(PO)   graphical electromagnetic computing   radar cross section(RCS)     
Received 2007-04-03;
About author: �� ��(1981��),��,����������,��ʿ��,xiangfangit@ee.buaa.edu.cn.
����, �ն���, ����.���ض�ͼ�ε�ż��㾫�ȵ�Ӱ��ͽ������[J]  �������պ����ѧѧ��, 2008,V34(04): 373-376
Fang Xiang, Su Donglin, Liu Yan.Influence of pixels to graphical electromagnetic computing accuracy and its solution methods[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(04): 373-376
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