| 摘要: |
| 受超远距离通信信号高衰减的限制，深空探测器的定向天线一般使用大口径高精度反射器以满足其高增益要求。为适应深空极端高低温环境，开展了2.5m大口径高精度环焦定向天线的结构设计，利用结构-电磁联合仿真分析温度变形对天线电性能影响，并采用近景摄影测量方法开展了热变形测试，获取了准确热变形数据，为大口径深空探测天线结构设计提供了借鉴与参考。 |
| 关键词: 定向天线 热变形 仿真与试验 |
| 基金项目: |
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| Structure Design and Simulation of Directional Antenna for Deep Space Exploration |
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Liu Weidong Liu Shuangrong Kuang Quanjin Su Xing Zhang Shunbo
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Shanghai Aerospace Electronic Technology Institute, Shanghai 201109
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| Abstract: |
| Limited by ultra-long distance communication signal attenuation, the directional antenna of deep space detector generally uses large aperture and high-precision reflector to meet the requirement of high gain. In the stage of scientific mission, the antenna works in extremely low temperature environment for a long time. To adapt to the deep-space extreme high and low temperature environment, this article will describe the structure design of 2.5m large-diameter and high-precision circular focal directional antenna. The structure-electromagnetic co-simulation will analyze the temperature deformation which can influence the electrical performance of the antenna. Meanwhile, the close-range photogrammetric measuring method will be used in the thermal deformation test to obtain the accurate data. These data provide reference for the structure design of large aperture deep space sounding antenna. |
| Key words: directional antenna thermal deformation simulation and test |
