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Volume 34 Issue 05
May  2008
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Journal of Beijing University of Aeronautics and Astronautics  > 2008  >  34(05): 560-563.
Lü Shanwei, Zhang Yan, Yu Huilong, et al. Analytical calculation of focal spot size for lens antenna[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(05): 560-563. (in Chinese)
Citation: Lü Shanwei, Zhang Yan, Yu Huilong, et al. Analytical calculation of focal spot size for lens antenna[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(05): 560-563. (in Chinese)
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Analytical calculation of focal spot size for lens antenna

  • 1.

    School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • 2. Institute No. 25 of the Second Academy, Chinese Aerospace Science and Industry Corporation, Beijing 100854, China

  • Received Date: 28 Apr 2007
  • Publish Date: 31 May 2008
    Abstract
  • An analytical method was presented to calculate the focal spot size of the focal lens antenna. Firstly, the formulation for the 3dB focal spot size on the focal plane of the focal lens antenna was derived by Huygens-Fresnel principle. Then this formulation was simplified for convenience and the approximate expression was obtained. Secondly, the field distribution on the plane that parallels the focal plane was discussed. In order to demonstrate the accuracy and efficiency of this new method, a focal lens antenna at Ka band was designed and simulated as an example. Moreover, two focal lens antennas were fabricated for comparison. And these two lens antennas were measured by the planar-near-fields (PNF) method. Finally, the results obtained by the proposed method were compared with those of numerical method and measured data. It is found that the results of 3dB focal spot size computed by the approximate expression are in good agreement with the experimental data.

     

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  • [1] 爱金堡F 3.超高频天线(上)[M].汪茂光译.北京:人民邮电出版社, 1981: 327-330 Айзенберг Г З. Ultra high frequency antenna[M]. Translated by Wang Maoguang. Beijing: Posts & Telecom Press,1981: 327-330(in Chinese) [2] 张岩,吕善伟, 苗俊刚, 等. FDTD-PWS法用于分析毫米波透镜天线焦面场[J].北京航空航天大学学报, 2007, 33(6): 682-685 Zhang Yan, Lü Shanwei, Miao Jungang, et al. Hybrid FDTD-PWS method for focal field analysis of lens antenna at millimeter-wave band[J]. Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(6): 682-685 (in Chinese) [3] Godi G, Sauleau R, Thouroude D. Performance of reduced size substrate lens antennas for millimeter-wave communications[J]. IEEE Transactions on Antennas and Propagation, 2005, 53(4): 1278-1286 [4] 贝克斐 G, 巴雷特A H.电磁振荡电磁波和辐射[M].王志符译. 北京:人民教育出版社, 1981: 472-488 Bekefi G, Barrett A H. Electromagnetic vibrations, waves, and radiation[M]. Translated by Wang Zhifu. Beijing: People-s Education Press, 1981: 472-488 (in Chinese) [5] Balanis C A. Antenna theory: analysis and design[M]. Hoboken, N J: John Wiley & Sons Inc, 2005: 165-170
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