一种新型光子晶体结构的微带天线

提出了一种新型的基于二维光子晶体基底的微带天线,光子晶体结构是人造的周期性电介质结构,本文采用的方法是在电介质中引入周期性分布的空气孔洞,孔洞的分布是三角形点阵,然后在中心孔洞引入缺陷,但只是在中心孔洞的下半部分引入缺陷,即中心孔洞的深度为周围孔洞深度的一半,天线的贴片放在孔洞的底部,即将天线贴片放在了光子晶体内部。我们采用HFSS仿真软件对该结构进行了模拟,数值仿真结果表明该结构对天线的方向性有明显改善。

A Novel Photonic Crystal Structure for Patch Antenna

In this paper,a new structure is proposed to improve the directivity of patch antenna.The substrate of the antenna incorporates photonic crystal,which has a triangular lattice.A defect is introduced at the central hole of the photonic crystal.Only the lower half of the central hole is removed,that is,the depth of the central hole is half of the depth of other holes.The patch is placed at the bottom of the central hole,which means the patch is inside the photonic crystal.The antenna using this new structure is numerically simulated with software HFSS.Numerical results demonstrate that radiation directivity is improved apparently.