| The high-speed vehicles radome which is used to protect inside antenna work safely under the rugged surroundings, it not only should adapt to the pneumatic heat and force circumstances, but also ensure the requirements of radio guidance, it is a dual function electromagnetic window. Influenced by the manufacturer process, the electrical property does not meet requirement after first molding, excessing bore sight error (BSE) and bore sight error slope (BSES) will influence the precision and stability of guidance. So it is necessary to analysis and assess the antenna-radome system, and giving guidance for optimization method.Accurate forward algorithm is the premise of effective electrical optimization. By comprehensive analyzing the characteristics and scope of electromagnetic field numerical analysis like geometrical optics, physical optics and low frequently method, and choose the plane wave spectrum-surface integration (PWS-SI) the main algorithms of numerical analysis. Introduced Gaussian integral in the plane wave spectrum near-field analysis to solve the lack of precision in the calculation of the non-circular antenna, implements the precision numerical calculation and analysis of three-dimensional antenna-radome system.According to the shortages such as step-iterations, low accuracy and efficiency in the conventional algorithms, introduced the concept of far-field effective viewing angle, only small extent viewing angle near extreme point had been considered. And the solving of far-field pattern and BSE is separated, the BSE can be solved by least square fitting function directly, the independence on single point’s precision is reduced, the new arithmetic’s efficiency was highly improved without reducing the accuracy.The inner surface grinding has a wide range of applications in the radome electrical properties compensation, but the definite grinding position is difficult to determine. This paper analyzes the antenna radiation changes during the scanning process, researched the existence of the scan angle of the largest bore sight error. And the radome inner face value point data were fitted to calculate the intersection of maximum bore sight scanning angle antenna spindle and radome. Then assumes the position of an intersection near the antenna-radome system electromagnetic sensitive areas, can be used as the location of the best grinding position. Finally the assumptions were verified by different locations simulation. The radome electrical performance calculation software was designed and developed based on Fortran and Visual C++mixed programming technology, with the application of efficient Fortran language to compute forward calculation and quadratic optimization algorithm of the electrical properties; taking the advantage of the powerful graphics capabilities of Visual C++to complete the design of the interface. This hybrid programming technology not only improves the efficiency of programming, also ensures that the software has a computationally efficient, friendly interface and features. |
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