加载电磁带隙结构的平切圆锥等角螺旋天线

摘要

The paper proposes a conformal equiangular spiral antenna on the circularly truncated cone with electromagnetic band-gap structure(EAS-EBG antenna), which shows wideband characteristics with respect to the gain. Firstly, a conformal equiangular spiral antenna on the circularly truncated cone(EAS antenna) is modeled and analyzed by using the professional software HFSS. Next, the EAS-EBG antenna is studied, which inserts a small area of electromagnetic band-gap(EBG) structure into the circularly truncated cone to remain conformal and increase gain. The simulation shows that the antenna gain increases about 1 to 3 dB within the frequency range from 5 to 12 GHz and the axial ratio remains almost unchanged.%加载电磁带隙的平切圆锥等角螺旋(EAS-EBG)天线可以在很宽的频带范围内提高辐射增益.建立了平切等角螺旋锥体(EAS)天线的基本模型,并用HFSS对其进行了仿真.研究了一种加载电磁带隙结构的平切圆锥等角螺旋锥体天线.该天线是在保持原平切等角螺旋锥体天线外形不变的情况下,加载了小型化的电磁带隙结构,以提高增益并保持共形化.仿真结果表明:加载电磁带隙结构的模型增益在5～12 GHz带宽下可以提高1～3 dB,并且轴比特性基本不变.