| 一种Ka频段卫星天线多模单脉冲馈源设计 |
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| 引用本文： | 毛新宏,王晓岚,田栋,尹伟臻,李静涛.一种Ka频段卫星天线多模单脉冲馈源设计[J].航天器工程,2014(2):95-99. |
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| 作者姓名： | 毛新宏 王晓岚 田栋 尹伟臻 李静涛 |
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| 作者单位： | 中国空间技术研究院;中国科学院大学;中国科学院国家天文台; |
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| 摘 要： | 针对高精度跟踪用户目标的需求,设计了一种Ka频段卫星天线多模单脉冲馈源。该馈源由和差网络、多模激励器和辐射喇叭组成,当从和差端口分别以TE10模激励时,多模激励器会激励出所需的11个工作模,由辐射喇叭在空间形成单脉冲和、差波束。对该馈源在和、差状态下的辐射特性进行仿真分析,结果表明,其和差矛盾小于2.5dB,差零深小于-40dB,同时馈源在方位面和俯仰面的辐射方向图具有良好的对称性。
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| 关 键 词： | Ka频段卫星天线 多模单脉冲馈源 辐射方向图 馈电网络 |
Design of Ka-band Satellite Antenna Multimode Monopulse Feed |
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| Institution: | MAO Xinhong WANG Xiaolan TIAN Dong YIN Weizhen LI Jingtao (1 China Academy of Space Technology, Beijing 100094, China) (2 University of Chinese Academy of Sciences, Beijing 100049, China) (3 National Astronomieal Observatory, Chinese Academy of Sciences, Beijing 100012, China) |
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| Abstract: | Considering the requirements to track the target terminal with high precision, a kind of Ka-band high performance multimode monopulse feed is design. This monopulse feed consists of a sum-difference network, a multimode actuator and a horn. When driving in the sum-difference ports in TEl0 mode respectively, the multimode actuator can excite the desired eleven higher-or- der modes and the horn generates the monopulse sum and difference beams in space. According to the analysis results of the sum and difference radiation patterns, the gain difference between sum and difference channels is less than 2.5dB, and the zero-depth of difference pattern is less than --40dB. Besides, a good performance in both the elevation and the azimuth plane is achieved. |
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| Keywords: | Ka-band satellite antenna multimode monopulse feed radiation pattern feed network |
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