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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Samii Y R. An efficient computational method for characterizing the effects of random surface error on the average power pattern of reflectors[J]. IEEE Trans. on AP, 1983, AP-31(1): 92-98.[2]Rusch W V T, Wohlleben R. Surface tolerance loss for dual-reflector antennas[J]. IEEE Trans.on AP, 1982, AP-30(4): 784-785.[3]Duan Dah-Weih, Samii Y R. A generalized diffraction synthesis technique for high performance reflector antennas[J]. IEEE Trans. on AP, 1995, AP-43(1): 27-40.[4]陈少平.馈源偏离焦点及反射面变形情况下抛物面天线辐射场的计算[J].中南民族学院学报,1995,14(1):24-26.[5]王五兔,徐国华.反射面变形对天线辐射方向图的影响.电子学报,1994,22(12):46-49.[6]胡明春,李建新.赋形波束双弯曲反射面探讨.现代雷达,1996,18(5):64-68.[7]林世明.赋形波束双弯曲反射器天线理论研究[J].电子学报,1981,9(4):56-66.[8]尹家贤,等.用FDTD和物理光学混合法分析毫米波抛物面天线[J].电子学报,2002,30(6):791-793.[9]阮颖铮.雷达散射截面与隐身技术[M].北京:国防工业出版社,1998:118-125.[10]崔索民,吴振森.PTD和PTDEEC算式的奇异点处理[J].电波科学学报,1997,12(4):369-374.[11]Arie Michaeli. Equivalent edge currents for arbitrary aspects of observation[J]. IEEE Trans. on AP, 1984, AP-32(3): 252-258. -
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