大曲率柱面共形天线的对比研究

Comparative Study of Large Curvature Cylindrical Plane Conformal Antenna

共形天线是天线的一个重要研究方向,传统的共形天线多采用微带天线,而当共形曲面的曲率较大时,微带天线会受限于介质基板难以弯曲等因素的影响,不适合在大曲率表面作共形,因此可以采用结构更加简单的柱面缝隙天线在大曲率表面做共形。利用HFSS仿真平台研究了广泛应用的微带共形天线,对不同曲率柱面下的微带天线做了对比仿真,根据仿真结果对微带天线在大曲率柱面上共形的问题进行了分析。同时,研究了不同曲率下的柱面缝隙天线,得到了不同曲率下天线的辐射特性。通过对这2种天线的对比仿真得出结论:柱面缝隙天线的回波损耗因柱面曲率的增大而引起的变化更小,而且柱面缝隙天线在共形曲面曲率增大时,具有全向辐射特性。因此,柱面缝隙天线对柱面曲率的敏感度更低,更适合在大曲率表面做共形,且当柱面曲率较大时具有全向辐射特性。

Conformal antenna is an important research direction of antenna,the traditional conformal antenna mostly uses microstrip antenna,and when the curvature of the conformal surface is large,the microstrip antenna will be limited by the media substrate is difficult to bend and other factors,not suitable for conformal in large curvature surface.Therefore,the more simple structure of the slotted cylinder antennas is used to do the conformal in the large curvature surface.In this paper,the widely used microstrip conformal antenna is studied by using HFSS simulation platform,and the comparative simulation of microstrip antenna under different curvature column surface is done,and the problem of conformal microstrip antenna on large curvature column surface is analyzed according to the simulation results.Further,the simulation studies the slot antenna on the cylinder surface under different curvature,and the radiation characteristics of the antenna under different curvature are obtained.Through the comparison simulation of these two types of antennas,the return loss of the slotted cylinder antenna is smaller due to the increase of the curvature of the cylindrical surface,and the slotted cylinder antenna has omnidirectional radiation characteristics when the curvature of the conformal surface increases.Therefore,the slotted cylinder antenna is less sensitive to the curvature of the column surface,more suitable to do conformal in large curvature surface,and has omnidirectional radiation characteristics when the curvature of the column surface is large.