应用于WiFi/WiMAX的三频超介质加载天线  

Tri-band Metamaterial-loaded Antenna for WiFi and WiMAX Application

作　　者：廖俊[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《电视技术》2011年第17期83-86,共4页Video Engineering

摘　　要：以研究超介质结构在天线中的应用为目的,采用了超介质理论中的负折射率传输线(NRI-TL)加载技术,设计了一种三工作频段的单极子贴片天线。该单极子天线由不均匀弯折线构成,采用共面波导(CPW)馈电。在2.45 GHz和55 GHz附近弯折线与超介质结构可形成折合单极子辐射;在3.55 GHz附近超介质结构可改变天线表面电流流向,增加天线谐振频率点,拓宽工作带宽。天线的仿真及测试结果表明,在WiFi频段以及WiMAX频段天线具有良好的阻抗带宽和辐射效率,天线的总尺寸为26 mm×30 mm×1.59 mm,结构紧凑,易于制作,能很好地适用于WLAN应用。Aiming to apply the metamaterial structure to the antenna, a tri-band printed monopole antenna is proposed which uses Negative Refractive Index Transmission Line （NRI-TL） metameterial loading. The monopole is consisted of a nonuniform meander-line, feeding by Coplanar Waveguide（CPW）. The meander-line and the metameterial loading can be modeled as a folded monopole at 2.45 GHz and 5.5 GHz, while the metameterial loading changes the direction of the surface current across the antenna around 3.55 GHz. Thus, it can increase the resonance frequency points of antenna and widen the bandwidth. The simulated and measured results show that the antenna has good impedance bandwidth and radiation efficiency during the range of WiFi and WiMAX, and the total size of the antenna is only 26mm×30mm×1.59mm, all of which make it well suited for WLAN appieations.

关 键 词：超介质 负折射率传输线 共面波导 折合单极子 

分 类 号：TN827[电子电信—信息与通信工程]