摘要
在保证天线性能的前提下,为了降低天线的剖面高度,设计了一种高折射率超材料,它是在介质板的两侧对称蚀刻方形金属贴片而构成。通过减小相邻金属贴片的间隙和介质板的厚度来增强电容耦合,同时抑制抗磁效应,从而在4~8 GHz的宽频带范围内实现了10的高折射率。将所设计的超材料加载到微带贴片天线上,提高了天线的阻抗带宽和增益。实验结果表明,S 11<-10 dB的阻抗带宽为690 MHz(相对带宽为12.4%),在5.6 GHz频点处,最大增益达到13 dB。
In order to reduce the profile height of the antenna under the premise of ensuring the performance of the antenna,a high refractive index metamaterial is designed,which is formed by symmetrically etching a square metal patch on both sides of the dielectric plate.By reducing the gap between adjacent patches and the thickness of the dielectric plate,the proposed metamaterial can suppress the diamagnetic effect and enhance capacitive coupling,so that the refractive index of the metamaterial increases to 10 in the broadband of 4-8 GHz.At the same time,the metamaterial can effectively improve the performance of a microstrip antenna when it is loaded as a superstrate.The measured results reveal that the impedance bandwidth of S 11<-10 dB is 690 MHz(12.4%)and the maximum gain reaches to 13 dB at 5.6 GHz.
作者
张燕
高喜
ZHANG Yan;GAO Xi(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China)
出处
《桂林电子科技大学学报》
2019年第6期443-447,共5页
Journal of Guilin University of Electronic Technology
基金
国家自然科学基金(61761010,61461016)
广西自然科学基金(2018GXNSFAA281193)
桂林电子科技大学研究生教育创新计划(2018YJCX24)。
关键词
高折射率
超材料
微带贴片天线
高增益
high refractive index
metamaterial
microstrip antenna
high gain