【作者】 薛靖铠； 欧阳鑫； 伍德鹏； 陈嘉豪； 陈星；

【Author】 XUE Jingkai;OUYANG Xin;WU Depeng;CHEN Jiahao;CHEN Xing;Sichuan University;

【机构】 四川大学；

【摘要】 本文提出了一种超宽带可重构的天线RCS缩减超表面,由有源频率选择吸波体、加载元件,以及直流偏置电路等结构所组成,可作为吸波、透波一体化天线罩。当通信天线不工作时,该超表面天线罩可在1.91 GHz～5.24 GHz内实现RCS缩减量大于10 dB的电磁隐身,吸波率大于90%,相对带宽达93%;当天线工作时,天线罩重构后在2.13 GHz～2.43 GHz的通信频段为小于3 dB的低插损通带,同时在1.11GHz～1.91 GHz、2.62 GHz～6.07 GHz内的RCS缩减量大于10 dB。该天线罩具有超宽带、带内RCS缩减与高缩减率、可重构以及入射波极化不敏感的特性,同时结构轻薄,单元尺寸仅为25mm×25mm×21mm。加工了5×5的阵列天线罩样机进行实验,测试结果与仿真吻合良好。更多还原

【Abstract】 In this paper,a broadband reconfigurable antenna RCS reduction electromagnetic metasurface is proposed,which composed of an active frequency selective rasorber,loaded elements,and DC bias circuits.It can be used as an wave absorptive/transmissive radome.When the communication antenna is not operating,the radome achieves electromagnetic stealth with RCS reduction greater than 10 dB over 1.91 GHz～5.24 GHz with a relative bandwidth of 93%;when the antenna is operating,the radome is reconfigured to form a low insertion loss passband of less than 3 dB in the communication band from 2.13 GHz～2.43 GHz,while the RCS reduction is greater than 10 dB within 1.11 GHz～1.91 GHz and 2.62 GHz～6.07 GHz.The radome exhibits broadband,in-band RCS reduction with high absorption rate,reconfigurability,and incident wave polarization-insensitivity,as well as a thin and light structure with a cell size of only 25 mm × 25 mm × 21 mm.A 5×5 array radome prototype was processed,the test results were in good agreement with the simulation.更多还原