改进的NURBS-PO法分析电大平台附近天线方向图

doi:10.3969/j.issn.1001-2400.2010.05.018

Abstract

Abstract:

An improved Physics Optics(PO) method based on Non Uniform Rational B Spline(NURBS) modeling is presented to calculate the disturbed pattern of an antenna around an electrically large platform. Compared with the conventional NURBS-PO method in which the true scattered field of an antenna is replaced by the spherical wave, the new technique uses the accurate radiation field as the incident field and overcomes the limitation that the antenna must be located far away from the scatterer. The improved Ludwig integral method is applied to compute the integration of the induced current over the surface, which avoids the complicated theory and the possible invalidation in searching stationary points within the stationary phase method(SPM) method. Numerical results obtained from the proposed approach are in good agreement with those obtained from the method of moments(MOM), which confirms the feasibility of the new technique. Meanwhile, the advantage in calculation speed for solving high frequency problems is demonstrated.

Key words: NURBS, physics optics, Ludwig integral, pattern

HUANG Kai;HE Zhi-li;LIANG Chang-hong. Improved NURBS-PO method for analyzing the disturbed pattern of an antenna around an electrically large platform[J].J4, 2010, 37(5): 879-883.

References

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Improved NURBS-PO method for analyzing the disturbed pattern of an antenna around an electrically large platform

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