| 宽角扫描侧馈偏置卡塞格伦天线的优化设计 |
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| 引用本文： | 刘少东,焦永昌,张福顺.宽角扫描侧馈偏置卡塞格伦天线的优化设计[J].电波科学学报,2004,19(6):713-716. |
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| 作者姓名： | 刘少东 焦永昌 张福顺 |
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| 作者单位： | 西安电子科技大学天线与微波技术国家重点实验室,陕西,西安,710071;西安电子科技大学天线与微波技术国家重点实验室,陕西,西安,710071;西安电子科技大学天线与微波技术国家重点实验室,陕西,西安,710071 |
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| 基金项目： | 国家自然科学基金，教育部优秀青年教师资助计划，国防重点实验室基金 |
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| 摘 要： | 为满足星载天线空间电扫描的要求,研究了宽角扫描侧馈偏置卡塞格伦天线(SFOC)的设计问题.给出了SFOC天线的结构形式,通过射线追踪的方法对SFOC的最佳馈源位置和最佳馈源指向进行了优化设计.二者的确定不仅改善了SFOC天线系统的扫描特性,而且提高了它的工程可实现性.分析结果表明,该SFOC天线在宽角扫描过程中,方向图畸变很小,增益损失和副瓣电平均达到了设计要求,从而为全球扫描星载天线的设计提供了有效的方案.
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| 关 键 词： | 星载天线 电扫描 射线追踪 最佳馈源位置 最佳馈源指向 |
| 文章编号： | 1005-0388(2004)06-0713-04 |
| 修稿时间： | 2003年10月8日 |
Optimal design of side-fed offset cassegrain dual reflector antennas for wide-angle scanning |
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| LIU Shao-dong,JIAO Yong-chang,ZHANG Fu-shun.Optimal design of side-fed offset cassegrain dual reflector antennas for wide-angle scanning[J].Chinese Journal of Radio Science,2004,19(6):713-716. |
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| Authors: | LIU Shao-dong JIAO Yong-chang ZHANG Fu-shun |
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| Abstract: | In order to meet global scanning requirements of the satellite antenna, a side-fed offset cassegrain (SFOC) antenna is designed in this paper. The structure of the SFOC antenna is constructed, and the optimum-feed position (OFP) and the optimum-feed direction (OFD) are analyzed by using the ray tracing method and the optimization method. The OFP and OFD can not only improve the wide-angle scanning ability of the antenna, but also increase the engineering feasibility of the SFOC antenna system. The simulation results indicate that the patterns of SFOC antenna in the wide-angle scanning region have less distortion, and both the gain losse and the sidelobe level may meet the design specifications. |
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| Keywords: | satellite antenna electronic scanning ray tracing optimum-feed position optimum-feed direction |
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