Ku波段双E结构超薄高效反射型线性极化转换表面
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摘要
提出了一种利用电磁超表面实现Ku波段(12～18GHz)的低剖面反射型线性极化转换表面,该表面能对Ku波段的线极化电磁波进行正交极化旋转。给出了极化转换表面的设计原理,并对极化转换表面工作的物理原理进行了解释,通过仿真确定了极化转换表面谐振点的位置。测试结果表明,该线性极化转换表面在工作频带内可以实现80%以上的转换效率,具有转换效率高、尺寸小、厚度薄和结构简单等优点。
A low profile linear reflective polarization conversion surface in the Ku band(12-18 GHz)is proposed using a metasurface,which can convert a linearly polarized incident wave into its orthogonal polarization states in the Ku band.The principle of designing such a polarization conversion surface is given.The physical working mechanism of a polarization conversion surface is clarified.The simulation is used to determine the positions of resonance points of the polarization conversion surface.The test results show that the proposed polarization conversion surface has a conversion efficiency of more than 80% within the working band,and has the advantages of high conversion efficiency,small size,small thickness,and simple structure.
A low profile linear reflective polarization conversion surface in the Ku band(12-18 GHz)is proposed using a metasurface,which can convert a linearly polarized incident wave into its orthogonal polarization states in the Ku band.The principle of designing such a polarization conversion surface is given.The physical working mechanism of a polarization conversion surface is clarified.The simulation is used to determine the positions of resonance points of the polarization conversion surface.The test results show that the proposed polarization conversion surface has a conversion efficiency of more than 80% within the working band,and has the advantages of high conversion efficiency,small size,small thickness,and simple structure.
引文
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[4] Gong B Y,Zhao X P,Pan Z Z,et al.A visible metamaterial fabricated by self-assembly method[J].Scientific Reports,2014,4:04713.
[5] Shelby R A,Smith D R,Schultz S.Experimental verification of a negative index of refraction[J].Science,2001,292(5514):77-99.
[6] Cheng Y Z,Nie Y,Gong R Z.Broadband 3D isotropic negative-index metamaterial based on fishnet structure[J].The European Physical Journal B,2012,85:62.
[7] Liu K T,Liu X,Ge Y H,et al.Generation of OAM vortex beams based on high-efficiency transmission metasurfaces[J].Acta Optica Sinica,2019,39(1):0126015.刘凯婷,刘鑫,葛悦禾,等.基于高效传输型超表面OAM涡旋波束的产生[J].光学学报,2019,39(1):0126015.
[8] Li Y H,Zhou L,Zhao G Z.Terahertz broadband polarizationconverterbasedonanisotropic metasurface[J].Chinese Journal of Lasers,2018,45(3):0314001.李永花,周璐,赵国忠.基于各向异性超表面的太赫兹宽带偏振转换器[J].中国激光,2018,45(3):0314001.
[9] Iriarte J C,Pereda A T,de Falcon J L M,et al.Broadband radar cross-section reduction using AMC technology[J].IEEE Transactions on Antennas and Propagation,2013,61(12):6136-6143.
[10] Chen W G,Balanis C A,Birtcher C R.Checkerboard EBG surfaces for wideband radar cross section reduction[J].IEEE Transactions on Antennas and Propagation,2015,63(6):2636-2645.
[11] Liu Y,Li K,Jia Y T,et al. Wideband RCS reduction of a slot array antenna using polarization conversion metasurface[J].IEEE Transactions on Antennas and Propagation,2016,64(1):326-331.
[12] Jia Y T,Liu Y, Guo Y J,et al.Broadband polarization rotation reflective surfaces and their applications to RCS reduction[J].IEEE Transactions on Antennas and Propagation,2016,64(1):179-188.
[13] Ghalyon H A,Akbari M,Sebak A.A 30GHz linear-to-circular polarization conversion using twolayer FSS[C]∥IEEE International Symposium on Antennas and Propagation&USNC/URSI National Radio Science Meeting,2017,978:671-672.
[14] Ni C,Chen M S,Zhang Z X,et al.Design of frequency-andpolarization-reconfigurableantenna based on the polarization conversion metasurface[J].IEEE Antennas and Wireless Propagation Letters,2018,17(1):78-81.
[15] Feng M D,Wang J F,Ma H,et al.Broadband polarization rotator based on multi-order plasmon resonances and high impedance surfaces[J].Journal of Applied Physics,2013,114(7):074508.
[16] Chen H Y,Wang J F,Ma H,et al.Ultra-wideband polarizationconversionmetasurfacesbasedon multiple plasmon resonances[J].Journal of Applied Physics,2014,115(15):154504.
[17] Mutlu M,Ozbay E.A transparent 90°polarization rotator by combining chirality and electromagnetic wave tunneling[J].Applied Physics Letters,2012,100(5):051909.
[18] Zhao Y,Belkin M A, AlùA. Twisted optical metamaterials for planarized ultrathin broadband circular polarizers[J]. Nature Communications,2012,3:870.
[19] Kundu D,Mohan A,Chakrabarty A.Ultrathin highefficiency X-band reflective polarization converter using sunken double arrowhead metasurface[C]∥ProceedingsoftheAsia-PacificMicrowave Conference,2016:16912824.
[20] Liang W,Bockrath M,Bozovic D,et al.Fabry-Perot interference in a nanotube electron waveguide[J].Nature,2001,411(6838):665-669.