| Computer Aided Design(CAD) is commonly used in antenna design in modern times.The antenna pattern computer-simulation is a important part of antenna system optimization design and simulation.At the beginning of this paper,some knowledge about antenna pattern and simulation methods will be introduced,and complex ray theory(CRT) will be discussed in detail.Then,we will analyse the pattern of antenna with radome.Multilayer radome will exert a tremendous influence on low sidelobe antenna pattern. Integrated directivity analysis of antenna with radome will be helpful to airborne antenna optimization design.However,it is very difficult for this analysis by traditional GO and PO because of the complicated geometry and multireflection of radome.In this paper,the Gaussian beam radiated by complex source point (CSP) is used to simulate the mainlobe and sidelobes of low sidelobe antenna.Then,the multireflection and transmission of all CSP fields in the radome are analyzed.Finally, transmission fields of all CSPs are added at the far zone and the pattern of anttena with radome is obtained.A 12-element array in a 2-D cylindrical radome and a single-pulse antenna in several kinds of 2-D peaked-vaulted radome are considered as numerical examples.The computation results show that the method in this paper is feasible and simple for integrated design of low sidelobe antenna with radome. |
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