基于组合梯度超表面的低RCS微带天线设计
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摘要
针对微带天线的带内和带外雷达散射截面(radar cross section,RCS)减缩问题,提出了一种加载组合梯度超表面的低RCS天线设计方法,以解决传统RCS减缩技术存在的带宽受限和设计复杂问题.该方法将8个梯度方向间隔45°的梯度超单元依次排列在辐射贴片的周围,由于梯度超单元的奇异反射特性,散射场将会被重新分布至各个方向,表现出漫反射效果,从而实现单站和双站的RCS减缩.仿真和测试结果表明:加载组合梯度超表面前后微带天线的RCS在7.2～18.4GHz减缩了5dB以上,且微带天线原有的辐射特性基本保持不变.该设计方法具有设计简单、超宽带工作的特点.
In regard of in-band and out-band radar cross section(RCS)reduction of microstrip antenna,a method for designing low RCS antenna based on combinatorial gradient metasurface is proposed,which can release the issue about bandwidth limited and design complexity of the conventional technology.The low RCS microstrip antenna is designed by distributing eight kinds of gradient supercells around radiation patch,the supercells have different gradient directions with an interval of 45°.Due to the anomalous reflection property of the gradient supercell,the scattered field is redistributed into various directions and performs like diffusion phenomenon.Therefore,both monostatic RCS and bistatic RCS can be suppressed.The simulated and measured results show that the RCS is reduced by more than 5 dB within 7.2-18.4 GHz as well as the radiation performance was maintained after loading the combinatorial gradient metasurfaces.The design approach features properties such as design convenience and ultra-wideband operation.
In regard of in-band and out-band radar cross section(RCS)reduction of microstrip antenna,a method for designing low RCS antenna based on combinatorial gradient metasurface is proposed,which can release the issue about bandwidth limited and design complexity of the conventional technology.The low RCS microstrip antenna is designed by distributing eight kinds of gradient supercells around radiation patch,the supercells have different gradient directions with an interval of 45°.Due to the anomalous reflection property of the gradient supercell,the scattered field is redistributed into various directions and performs like diffusion phenomenon.Therefore,both monostatic RCS and bistatic RCS can be suppressed.The simulated and measured results show that the RCS is reduced by more than 5 dB within 7.2-18.4 GHz as well as the radiation performance was maintained after loading the combinatorial gradient metasurfaces.The design approach features properties such as design convenience and ultra-wideband operation.
引文
[1]龚书喜,刘英.天线雷达截面预估与减缩[M].西安:西安电子科技大学出版社,2010.
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[12]刘涛,曹祥玉,高军,等.基于超材料的吸波体设计及其波导缝隙天线应用[J].物理学报,2012,61(18):184101.LIU T,CAO X Y,GAO J,et al.[J].Design of metamaterial absorber and its applications for waveguide slot antenna[J].Acta physica sinica,2012,61(18):184101.(in Chinese)
[13]龚琦,张帅,龚书喜,等.利用高阻抗表面缩减天线雷达截面的新方法[J].西安电子科技大学学报(自然科学板),2012,39(3):120-125.GONG Q,ZHANG S,GONG S X,et al.Application of the high impedance surface for RCS reduction of the antenna[J].Journal of Xidian University,2012,39(3):120-125.(in Chinese)
[14]PAN W,HUANG C,CHEN P,et al.A low-RCSand high-gain partially surface antenna[J].IEEEtransaction on antennas and propagation,2014,62(2):945-949.
[2]YU N F,GENEVET P,KATS M A,et al.Light propagation with phase discontinuities:generalized laws of reflection and refraction[J].Science,2011,334(6054):333-337.
[3]JIA S,WAN X,BAO D,et al.Independent controls of orthogonally polarized transmittedwaves using a Huygens metasurface[J].Laser photonics review,2015,9:545.
[4]ZHU H L,CHEUNG S W,CHUNG K L,et al.Linear-tocircular polarization conversion using metasurface[J].IEEE transactions on antennas and propagation,2013,61(9):4615-4623.
[5]杨欢欢,曹祥玉,高军,等.一种超薄吸波材料及其在缝隙天线中的应用[J].电子与信息学报,2012,34(11):2790-2794.YANG H H,CAO X Y,GAO J,et al.An ultra-thin metamaterial absorber and its application in reducing RCS of slot antenna[J].Journal of electronics&information technology,2012,34(11):2790-2794.(in Chinese)
[6]李文惠,张介秋,屈绍波,等.基于宽带吸波体的微带天线雷达散射截面缩减设计[J].物理学报,2015,64(8):084101.LI W H,ZHANG J Q,QU S B,et al.Radar cross section reduction of microstrip antenna based on wideband metamaterial absorber[J].Acta physica sinica,2015,64(8):084101.(in Chinese)
[7]LIU Y,LI K,JIA Y,et al.Wideband RCS reduction of a slot array antenna using polarization conversion metasurfaces[J].IEEE transaction on antennas and propagation,2016,64(1):326-331.
[8]LIU Y,HAO Y,LI K,et al.Radar cross section reduction of a microstrip antenna based on polarization conversion metamaterial[J].IEEE antennas and wireless propagation letters,2016,15:80-83.
[9]KANG X,SU J,ZHANG H,et al.Ultra-wideband RCS reduction of microstrip antenna array by optimised multi-element metasurface[J].Electronics letters,2017,53(8):520-522.
[10]SU J,KONG C,LI Z,et al.Wideband diffuse scattering and RCS reduction of microstrip antenna array based on coding metasurface[J].Electronics letters,2017,53(16):1088-1090.
[11]ZHENG Y J,GAO J,CAO X Y,et al.Wideband RCS reduction of a microstrip antenna using artificial magnetic conductor structures[J].IEEE antennas and wireless propagation letters,2015,14:1582-1585.
[12]刘涛,曹祥玉,高军,等.基于超材料的吸波体设计及其波导缝隙天线应用[J].物理学报,2012,61(18):184101.LIU T,CAO X Y,GAO J,et al.[J].Design of metamaterial absorber and its applications for waveguide slot antenna[J].Acta physica sinica,2012,61(18):184101.(in Chinese)
[13]龚琦,张帅,龚书喜,等.利用高阻抗表面缩减天线雷达截面的新方法[J].西安电子科技大学学报(自然科学板),2012,39(3):120-125.GONG Q,ZHANG S,GONG S X,et al.Application of the high impedance surface for RCS reduction of the antenna[J].Journal of Xidian University,2012,39(3):120-125.(in Chinese)
[14]PAN W,HUANG C,CHEN P,et al.A low-RCSand high-gain partially surface antenna[J].IEEEtransaction on antennas and propagation,2014,62(2):945-949.