| 高斯分布圆口径天线辐射近场分析 |
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| 引用本文： | 余川,陈鑫,薛长江,孟凡宝.高斯分布圆口径天线辐射近场分析[J].强激光与粒子束,2010,22(6). |
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| 作者姓名： | 余川 陈鑫 薛长江 孟凡宝 |
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| 作者单位： | 中国工程物理研究院 应用电子学研究所， 四川 绵阳 621900 |
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| 摘 要： | 采用口径场法对具有高斯幅度分布的圆口径天线辐射近场进行了分析。推导了非聚焦和聚焦2种工作方式下圆口径天线轴向近场和增益的解析表达式;采用数值积分方法分析了圆口径天线非轴向近场分布特性。分析表明,对于高斯幅度分布的圆口径天线,天线轴向场在近区为振荡分布,其近场增益与口径面分布和观测点位置有关,通过聚焦可以使近场焦点处增益达到远场增益,大大提高焦点及焦点附近区域的电场幅度。
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| 关 键 词： | 高斯分布 辐射近场 圆口径天线 近场增益 聚焦 |
| 收稿时间： | 1900-01-01; |
Near field properties of circular aperture antennas with Gaussian amplitude distribution |
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| Yu Chuan,Chen Xin,Xue Changjiang,Meng Fanbao.Near field properties of circular aperture antennas with Gaussian amplitude distribution[J].High Power Laser and Particle Beams,2010,22(6). |
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| Authors: | Yu Chuan Chen Xin Xue Changjiang Meng Fanbao |
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| Institution: | Institute of Applied Electronics, P.O.Box 919-1016, Mianyang 621900, China |
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| Abstract: | The near field properties of circular aperture antennas with Gaussian amplitude distribution are analyzed by the aperture field integration method in this paper. The axial near field and gain expressions of the unfocused and focused circular aperture antennas are deduced. The near-axis field distribution of circular aperture antennas is obtained by numeric integration method. The analysis shows that for the circular aperture antennas with Gaussian amplitude distribution, axial near field varies in an oscillatory manner and the near-field gain is related to both aperture distribution and the distance from the antenna. The near-field gain in the focus can achieve the gain in far field and the field intensity near the focus can be enhanced greatly through aperture focusing. |
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| Keywords: | radiating near field circular aperture antenna near-field gain focusing |
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