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设计了一种基于分形树结构的高性能频率选择表面(frequency selective surface,FSS),并将其作为微带天线的空间滤波器,同时改善天线的辐射与散射性能. 该FSS单元是由两层金属及其中间介质组成,上、下层金属采用金属柱连结,整体构成树枝状分形结构. 通过优化参数,得到了一种宽带、极化无关、宽入射角、小型化的超薄FSS,厚度只有约0.017λ. 将该FSS应用于微带天线后,天线的相对带宽拓展到40%,工作频段内的增益得到改善,9.6 GHz时,天线的增益提高了6.7 dB,同时,天线工作频带内的雷达散射截面(radar cross section,RCS)也得到了明显减缩,最大减缩为12.7 dB. 实验结果与仿真结果符合得较好,证实了该空间滤波器具有提高宽带天线增益、增强天线定向性、改善天线带宽与降低天线带内RCS的效果,可以应用于宽带天线带内辐射与散射性能的同时改善.A novel frequency selective surface(FSS) with stable performance is designed and applied to microstrip antenna. The FSS cell is composed of two metallic layers separated by a dielectric spacer. The top and bottom layers connected with metallic cylinders form the fractal dendritic model. By optimizing the geometric parameters of the model, an ultra-thin FSS spatial filter is obtained, whose thickness is only 0.017λ, with wideband, polarization insensitive, wide-incident angle, and miniaturization properties. When applying the radome to microstrip antenna, the bandwidth of the antenna is improved to 40%, the gain is enhanced in the whole operating frequency band, especially at 9.6 GHz, the gain is increased by 6.7 dB; at the same time, the in-band radar cross section(RCS) is reduced significantly, and the largest reduction exceeds 12.7 dB. Experimental results are in good agreement with the simulated ones, which verifies that the novel FSS spatial filter can be used to increase the gain of broadband antenna, enhance the directivity, improve the bandwidth, and reduce the in-band RCS; to sum up, it can be applied to broadband antennas to improve their radiation as well as scattering performance at one time.
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Keywords:
- frequency selective surface /
- wideband /
- high-gain /
- radar cross section
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[16] Zhao H, Qu S B, Lin B Q, Wang J F, Ma H, Xu Z, Peng W D, Bai P 2012 IEEE Trans. Antennas Propagat. 60 3040
[17] Zhu B, Wang Z, Huang C, Feng Y, Zhao J, Jiang T 2010 Progress in Electromagnetics Research 10 231
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[27] Abbas P, Hadi B, Javad N 2012 IEEE Trans. Antennas Propagat. 60 2101
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[1] Munk B A 2000 Frequency Selective Surfaces Theory and Design (New York: Wiley) p28
[2] Rajesh N, Malathi K, Sanjay B, Ramprabhu S, Sandeepkumar P, Jayaram K P 2013 IEEE Antennas And Wireless Propagation Letters 12 718
[3] Chen Y, Zhao D, Wang Y, Shu W 2012 Chin. Phys. B 21 058401
[4] Gao J S, Feng X G, Sun L C, Jia H Y 2009 Acta Phys. Sin. 58 505 (in Chinese) [高劲松, 冯晓国, 孙连春, 贾宏燕 2009 物理学报 58 505]
[5] Tang G M, Miao J G, Dong J M, Hu X Q 2012 Acta Phys. Sin. 61 118401 (in Chinese) [唐光明, 苗俊刚, 董金明, 胡晓晴 2012 物理学报 61 118401]
[6] Wang S S, Gao J S, Liang F C, Wang Y S, Chen X 2011 Acta Phys. Sin. 60 050703 (in Chinese) [王珊珊, 高劲松, 梁凤超, 王岩松, 陈新 2011 物理学报 60 050703]
[7] Gao J S, Wang S S, Feng X G, Xu N X, Zhao J L, Chen H 2010 Acta Phys. Sin. 59 7338 (in Chinese) [高劲松, 王珊珊, 冯晓国, 徐念喜, 赵晶丽, 陈红 2010 物理学报 59 7338]
[8] Tang G M, Miao J G, Dong J M 2012 Acta Phys. Sin. 61 068402 (in Chinese) [唐光明, 苗俊刚, 董金明 2012 物理学报 61 068402]
[9] Wang J B, Lu J 2011 Acta Phys. Sin. 60 057304 (in Chinese) [汪剑波, 卢俊 2011 物理学报 60 050703]
[10] Xu L X, Feng X G, Wang Y S, Chen X, Gao J S 2011 Acta Phys. Sin. 60 114102 (in Chinese) [徐念喜, 冯晓国, 王岩松, 陈新, 高劲松 2011 物理学报 60 114102]
[11] Yuehe G, Karu P E, Trevor S F 2012 IEEE Trans. Antennas Propagat. 60 743
[12] Andrew R W, Trevor S B, Jay G Y 2008 IEEE Trans. Antennas Propagat. 56 3382
[13] Abbas P, Hadi B, Javad N 2012 IEEE Trans. Antennas Propagat. 60 2101
[14] Lina M, Bernard J 2010 IEEE Trans. Antennas Propagat. 9 326
[15] Alireza F, Lotfollah S 2012 IEEE Trans. Antennas Propagat. 60 78
[16] Zhao H, Qu S B, Lin B Q, Wang J F, Ma H, Xu Z, Peng W D, Bai P 2012 IEEE Trans. Antennas Propagat. 60 3040
[17] Zhu B, Wang Z, Huang C, Feng Y, Zhao J, Jiang T 2010 Progress in Electromagnetics Research 10 231
[18] Ma Y, Chen Q, Grant J, Saha S C, Khalid A, Cumming D R 2011 Opt. Lett. 36 945
[19] Li H, Li H Y, Zhou B, Shen X P, Cheng Q, Cui T J 2011 J. Appl. Phys. 110 014909
[20] Luo H, Wang T, Gong R Z, Nie Y, Wang X 2011 Chin. Phys. Lett. 28 034204
[21] Lu L, Qu S B, Ma H, Yu F, Xia S, Xu Z, Bai P 2013 Acta Phys. Sin. 62 104102 (in Chinese) [鲁磊, 屈绍波, 马华, 余斐, 夏颂, 徐卓, 柏鹏 2013 物理学报 62 104102]
[22] Cheng Y Z, Nie Y, Gong R Z, Wang X 2013 Acta Phys. Sin. 62 044103 (in Chinese) [程用志, 聂彦, 龚荣洲, 王鲜 2013 物理学报 62 044103]
[23] Munk B A 2000 Frequency Selective Surfaces Theory and Design (New York: Wiley) p80–116
[24] Lei C J, Yu S, Li H F, Niu X J, Liu Y H, Hou S Y, Zhang T Z 2013 Acta Phys. Sin. 62 044103 (in Chinese) [雷朝军, 喻胜, 李宏福, 牛新建, 刘迎辉, 候慎勇, 张天钟 2012 物理学报 61 180202]
[25] Prior C J, Hall P S 1985 Electron Lett. 21 719
[26] Feresidis A P, Vardaxoglou J C 2001 IEE Proc-Microw. Antennas Propag 148 345
[27] Abbas P, Hadi B, Javad N 2012 IEEE Trans. Antennas Propagat. 60 2101
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