用PTD分析双弯曲反射面天线形变和穿孔的辐射特性
Analysis of the Radiation Characteristics of the Doubly Curved Reflector Antenna with Surface Distortion and Holes Using PTD
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摘要: 该文根据模型反射面天线的爆炸实验测试结果建立了反射面天线形变的数学模型，应用物理光学(P0)法和物理绕射(PTD)理论计钟：了一种赋形反射面天线形变后的辐射特性，同时还计算了反射面天线表面被爆炸破片穿孔后的辐射特性，结果表明，由于反射面的局部形变，直接导致辐射方向图的恶化，并且随着形变部分面积的增大，水平面的副瓣抬高很大，穿孔也会使水平面的副瓣抬高。Abstract: The reflector antenna distortion model is built by exploding test results. The radiation characteristics of a kind of distorted shaped reflector antenna are computed by using PO and PTD method, and the radiation characteristics of the reflector antenna with holes on the surface are also computed. The simulation results show that because of the local distortion of the reflector the radiation patterns become degraded. The sidelobe level in the azimuth plane becomes higher as the distortion area becomes bigger. It can be seen that the sidelobe level in the azimuth plane also increases because of the reflector perforated with holes on the surface.
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