Wang W.,Northwestern Polytechnical University |
Wan G.,Northwestern Polytechnical University |
Gong Y.,Research Institute for Special Structures of Aeronautical Composite of AVIC |
Yuan Z.,Research Institute for Special Structures of Aeronautical Composite of AVIC
Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University | Year: 2014
The high frequency method for radome analysis based on local planar approximation, network transmission matrix and the equivalent electromagnetic current integral method is widely used to calculate the far field of a radome-enclosed antenna. Under these methods, the radome surface curvature is the partial cause for calculation errors. The ray tracing method, the aperture integration-surface integration method and the method of moment for volume integral equation are used to study the relationship between the calculation errors of the high frequency method and the radome surface curvature. The 2D model of the radome is established, with the large curvature tip region or big local curvature perturbation on its smooth surface. The calculation results, given in Figs. 2, 3 and 4, and their analysis show preliminarily that when the curvature radius of the radome surface is five times larger than the wavelength, the high frequency method based on local planar approximation has the calculation accuracy almost similar to the volume integral equation method of moment, but when the curvature radius is smaller than two times of the wavelength, the high frequency method has serious calculation error.