| 一种紧凑型双圆极化有源接收天线设计 |
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| 引用本文： | 陈义峰,梁仙灵,李建平,王堃,贺冲,耿军平,朱卫仁,金荣洪.一种紧凑型双圆极化有源接收天线设计[J].电波科学学报,2018,33(4):496-503. |
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| 作者姓名： | 陈义峰 梁仙灵 李建平 王堃 贺冲 耿军平 朱卫仁 金荣洪 |
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| 作者单位： | 上海交通大学电子信息与电气工程学院, 上海 200240 |
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| 基金项目： | 国家自然科学基金61571298国家自然科学基金61671416国家自然科学基金61471240国家自然科学基金61571289国家自然科学基金51777168国家自然科学基金61701303上海市自然科学基金17ZR1414300上海市浦江人才计划17PJ1404100 |
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| 摘 要： | 设计了一种S波段紧凑型双圆极化有源接收天线，该有源接收天线将微带贴片天线与90°混合电桥、低噪声放大器集成设计，既实现了有源天线的整体小型化又提高了各器件间的连接效率；并通过背馈玻璃绝缘子和一种半差分的方式馈电，在改善微带贴片天线方向图对称性的同时，简化了传统差分式馈电的复杂结构.仿真和实测结果表明，该有源接收天线在2.2~2.3 GHz内端口驻波比小于1.47，噪声系数小于0.73 dB，主瓣内轴比小于2.4 dB，G/T值大于-13.9 dB/K，与已有公开文献的有源接收单元天线相比，在保持结构紧凑的同时，其G/T值有较大幅度提升.
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| 关 键 词： | 有源天线 双圆极化 小型化 低噪声 高G/T值 |
| 收稿时间： | 2017-10-01 |
Design of a compact dual-circularly-polarized active receiving antenna |
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| Affiliation: | School of Electronic Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China |
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| Abstract: | A compact dual-circularly-polarized active receiving antenna is designed for S-band applications, which integrates a microstrip patch antenna with a 90° hybrid bridge and low noise amplifiers. The proposed active receiving antenna not only achieves the miniaturization of the antenna but also improves the connection efficiency among each device. Meanwhile, the antenna is probe-fed by glass insulators through a semi-differential method which improves the symmetry of the antenna radiation pattern and simplifies the structure of conventional differential feeding method. The simulated and measured results show that the voltage standing wave ratio(VSWR) of the active receiving antenna is less than 1.47, the noise figure is less than 0.75 dB, the axis ratio within the main lobe is less than 2.4 dB, and the G/T value is greater than -13.9 dB/K from 2.2 to 2.3 GHz. The G/T value of the antenna is greatly improved compared with existing active receiving antennas. |
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