【作者】 莫东升； 陈波； 田径； 孙凯；

【Author】 Dongsheng Mo;Bo Chen;Jing Tian;Kai Sun;University of Electronic Science and Technology of China;

【机构】 电子科技大学；

【摘要】 本文提出了一种基于极化转换贴片(Polarization Conversion Surface,PCS)的低RCS液晶天线,可以实现频率可重构以及在较宽频带内实现RCS缩减。通过在天线介质中加载液晶,并对其添加偏置线,使得液晶的介电常数可以实现从2.4到3.2的变化,进而实现天线的频率可重构。在此基础上,通过加载极化转换贴片,根据相位相消原理,可以实现天线RSC的缩减。仿真结果表明,本文设计的液晶天线可以实现5.66 GHz～6.28 GHz的中心频率变换,6 GHz的天线增益为7.48 dBi。加载极化转换贴片后,该液晶天线在7.2 GHz～20 GHz的频率范围内实现了≥3.6 dB的RCS缩减,并且不会对液晶天线的辐射性能造成影响。更多还原

【Abstract】 A low RCS liquid crystal antenna based on the polarization conversion surface(PCS) is proposed in this paper,which can realize the reduction of RCS in a wide band and frequency reconfiguration.By loading the liquid crystal in the antenna substrate and adding the bias line,the dielectric constant of the liquid crystal can be changed from 2.4 to 3.2,then the frequency of the antenna can be reconfigurable.On this basis,by loading the PCS,the RSCreduction can be realized according to the principle of phase elimination.The simulation results show that the liquid crystal antenna designed in this paper can realize the center frequency conversion of 5.66 GHz to 6.28 GHz,and the antenna gain is 7.48 dBi.After the PCS is loaded,the liquid crystal antenna can realize RCS reduction ≥3.6 dB in 7.2 GHz～20 GHz,and the radiation performance of the liquid crystal antenna is not affected.更多还原