X波段全向共形机载天线的仿真与设计  

Simulation and Design of X-Band Conformal Antenna on Airborne Craft with Omni-directional Radiation

作　　者：韩振平[1] 钱祖平[1,2] 倪为民[1] 刘宗全[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007 [2]东南大学毫米波国家重点实验室,江苏南京210096

出　　处：《指挥控制与仿真》2011年第4期67-71,共5页Command Control & Simulation

基　　金：国家自然科学基金项目(No.60872046)

摘　　要：针对工作于X频段的机载雷达天线的技术设计,使该天线由矩形平面天线与柱体共形,通过共面波导方式对其进行馈电。天线单元采用介电常数2.55,厚度为0.2mm的薄介质板。利用HFSS12对平面天线和共形天线进行仿真设计,对比了平面天线与共形天线的阻抗特性和辐射特性的变化。实验结果表明,共形后的天线带宽变大,增益提高,波束宽度展宽。在X波段内实现了低仰角扫描和方位面的全向扫描,实测阻抗带宽为7.0～12.5GHz,最大增益可达4dB,辐射特性稳定,满足机载天线的性能指标,可用作机载雷达天线单元。A cylindrical conformal antenna operation at X band is designed.Firstly,a planar antenna is designed and analyzed,and then it is mounted on a cylindrical surface to form a conform antenna.It is fed by CPW and the permittivity of the substrate is 2.55 and its thickness is only 0.2mm.It is simulated and optimized by using the soft of HFSS 12.Comparing the impedance characteristic and radiation patterns between the planar antenna and the conformal antenna,the experimental results show the conformal antenna has a broader bandwidth and 3dB beam-width and higher gain than the planar antenna,and it has low elevation scanning and Omni-directional radiation patterns at the X band.The measured impedance bandwidth of conformal antenna covers from 7.0~12.5GHz,the maximum gain is 4dB and radiation performance is stable.The antenna satisfies the capability of airborne antenna well so it can be used in the airborne radar system.

关 键 词：X波段 机载天线 柱面共形 全向辐射 

分 类 号：TN822[电子电信—信息与通信工程]