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Dealing with potential applications of phase gradient metasurfaces in stealth technologies, we propose to realize wide-band radar cross section (RCS) reduction by combining the two mechanisms of surface wave generation and anomalous reflection. A two-dimensional phase gradient based metasurface is designed using split-ring resonators. Around the designed central frequency f=10 GHz, the incident waves are coupled into surface waves propagating along the metasurface. While at the frequency band f>11 GHz, anomalous reflection and diffuse reflection occur. In this way, wide-band RCS reduction can be realized. A test sample with a total thickness of 2 mm is fabricated and its reflection and backward RCS are measured and compared with those of bare metallic plate with the same size. The comparison shows that the metasurface achieves more than 10 dB reduction in the measured wide range (9.5-17.0 GHz). The metasurface is a polarization independent, electrically thin, light-weight and wide-band, so it is of great application values in novel stealth technologies and materials.
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Keywords:
- radar cross section /
- meta-surface /
- surface waves /
- anomalous reflection
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[20] Wu Z, Wang Q, Zhou J A, Li C F, Shi J L 2002 Acta Phys. Sin. 51 1612 (in Chinese) [吴中, 王奇, 周炯昂, 李春芳, 施解龙 2002 51 1612]
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[1] Yu N, Genevet P, Kats A M, Aieta F, Tetienne J P, Capasso F, Gaburro Z 2011 Science 334 333
[2] Aieta F, Genevet P, Yu N, Kats A M, Gaburro Z, Capasso F 2012 Nano Lett. 12 1702
[3] Wei Z Y, Cao Y, Su X P, Gong Z J, Long Y, Li H Q 2013 Opt. Express 21 010739
[4] SunY Y, Han L, Shi X Y, Wang Z N, Liu D H 2013 Acta Phys. Sin. 62 104201 (in Chinese) [孙彦彦, 韩璐, 史晓玉, 王兆娜, 刘大禾 2013 62 104201]
[5] Ni X, Emani N K, Kildishev A V, Boltasseva A, Shalaev V M 2012 Science 335 427
[6] Grady N K, Heyes J E, Chowdhury D R, Zeng Y, Reiten M T, Azad A K, Taylor A J, Dalvit D A R, Chen H T 2013 Science 340 1304
[7] Nader Engheta N 2011 Science 334 317
[8] Farmahini-Farahani M, Mosallaei H 2013 Opt. Lett. 38 462
[9] Pfeiffer C, Grbic A 2013 Phys. Rev. Lett. 110 197401
[10] Sun S L, He Q, Xiao S Y, Xu Q, Li X, Zhou L 2012 Nature Mater. 11 426
[11] Wang J F, Qu S B, Ma H, Xu Z, Zhang A X, Zhou H, Chen H Y, Li Y F 2012 Appl. Phys. Lett. 101 201104
[12] Pinchuk A O, Schatz G C 2007 J. Opt. Soc. Am. 24
[13] Paul O, Reinhard B, Krolla B, Beigang R, Rahm M 2010 Appl. Phys. Lett. 96 241110
[14] Pendry J B, Schurig D, Smith D R 2006 Science 312 1780
[15] Wang J F, Zhang J Q, Ma H, Yang Y M, Wu X, Qu S B, Xu Z, Xia S 2010 Acta Phys. Sin. 59 1851 (in Chinese) [王甲富, 张介秋, 马华, 杨一鸣, 吴翔, 屈绍波, 徐卓, 夏颂 2010 59 1851]
[16] Gu C, Qu S B, Pei Z B, Xu Z, Lin B Q, Zhou H, Bai P, Gu W, Peng W D, Ma H 2011 Acta Phys. Sin. 60 087802 (in Chinese) [顾超, 屈绍波, 裴志斌, 徐卓, 林宝勤, 周航, 柏鹏, 顾巍, 彭卫东, 马华2011 60 087802]
[17] Xu X H, Wu X, Xiao S Q, Gan Y H, Wang B Z 2013 Acta Phys. Sin. 62 084101 (in Chinese) [徐新河, 吴夏, 肖绍球, 甘月红, 王秉中 2013 62 084101]
[18] Zeng R, Xu J P, Yang Y P, Liu S T 2007 Acta Phys. Sin. 56 6446 (in Chinese) [曾然, 许静平, 羊亚平, 刘树田 2007 56 6446]
[19] Kats A V, Savel’ev S, Yampol’skii V A, Nori1 F 2008 Phys. Rev. Lett. 98 073901
[20] Wu Z, Wang Q, Zhou J A, Li C F, Shi J L 2002 Acta Phys. Sin. 51 1612 (in Chinese) [吴中, 王奇, 周炯昂, 李春芳, 施解龙 2002 51 1612]
[21] Wang W S, Zhang L W, Zhang Y W, Fang K 2013 Acta Phys. Sin. 62 024203 (in Chinese) [王五松, 张利伟, 张冶文, 方恺 2013 62 024203]
[22] Sun T T, Lu K Q, Chen W J, Yao F X, Niu P J, Yu L Y 2013 Acta Phys. Sin. 62 034204 (in Chinese) [孙彤彤, 卢克清, 陈卫军, 姚风雪, 牛萍娟, 于莉媛 2013 62 034204]
[23] Zhang H F, Cao D, Tao F, Yang X H, Wang Y, Yan X N, Bai L H 2010 Chin. Phys. B 19 027301
[24] Quan J, Tian Y, Zhang J, Shao L X 2011 Chin. Phys. B 20 047201
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