宽带宽缝隙共形天线的设计及其特性研究  

Design and Characteristics Analysis of Wideband Wide-slot Conformal Antenna

作　　者：韩振平[1] 钱祖平[2] 刘宗全[1] 倪为民[2] 

机构地区：[1]解放军理工大学通信工程学院研究生1队,江苏南京210007 [2]解放军理工大学通信工程学院卫星通信系

出　　处：《军事通信技术》2012年第1期1-6,共6页Journal of Military Communications Technology

基　　金：国家自然科学基金资助项目(60872046)

摘　　要：针对宽带共形天线需要满足剖面低、体积小、易与载体共形并且具有宽频带性能的要求,文章首先设计了一种宽带宽缝隙平面天线,采用共面波导方式(CPW)馈电,低介电常数介质板厚度仅有0.2 mm,分析了各个参数对天线特性的影响,将平面天线与柱体共形,研究了天线共形之后的阻抗特性和辐射特性的变化。仿真结果表明,平面天线的阻抗带宽(S11≤10 dB)覆盖5.35 GHz^6.7 GHz,中心频率为5.85 GHz,最大增益4.5 dB,辐射特性稳定,共形后天线的谐振频率减小,低频带宽增大,波束宽度展宽,辐射增强,阻抗带宽覆盖5.24 GHz^6.43GHz,最大增益4.6 dB,辐射特性稳定。测试结果与仿真吻合较好,天线的结构简单,易于和载体共形。Wideband conformal antenna must have low profile, small size, conformability to mounting hosts and good wideband performance. A wideband wide aperture antenna using thin substrate was proposed. The thickness of the substrate with low dielectric constant is only 0.2 mrn, and the antenna is fed by Coplanar Waveguide （CPW）. The effects of the parameters on the planar antenna were analyzed. Then the planar antenna was mounted on the cylinder and its impedance characteristics and radiation performances simulated. The simulated results show that the impedance bandwidth of the planar antenna ranges from 5.35 GHz to 6.7 GHz with the cen- tral frequency of 5.85 GHz and that it has stable radiation capability with the maximum gain of 4. 5 dB. The resonant frequency decreases and the impedance bandwidth is from 5.24-6.43 GHz when the planar antenna mounted on the cylinder. Its beamwidth broadens and the radiation performance enhances with the maximum gain of 4.6 dB. The measured results agree well with the simulated results and the radiation patterns are stable, its size is small and it can conform to mounting hosts easily.

关 键 词：宽频带 宽缝隙 共面波导馈电 共形天线 

分 类 号：TN822[电子电信—信息与通信工程]