基于平面微带结构超介质天线设计与分析

利用开槽曲流技术构建了一种工作频段位于S、C波段内的多频微带贴片天线,根据传统立体左手材料的变型结构设计了一种新型平面微带结构的超介质。在微带贴片天线的介质基板内加载超介质覆层后,天线工作频率降低,频带展宽以及辐射性能得到改善。HFSS和Matlab仿真实验结果表明,新型平面微带结构的超介质在2.7~4.9GHz和5.0~5.5 GHz两个频段内具有等效介电常数和等效磁导率均小于0的左手特性,工作频率在2.66,3.67,4.66和5.49 GHz的微带贴片天线加载超介质覆层后,其谐振频率分别降低了140,140,210和270 MHz,同时4.60~4.78GHz的工作频带展宽了160 MHz。该超介质微带天线可以运用于实际的WLAN或WIMAX通信中。

Design and analysis of metamaterial antenna based on plane microstrip structure

A microstrip patch antenna with multi-frequency in S,C frequency bands was designed by slots cutting technology.Besides,a novel left-handed Metamaterial(MTM) with plane microstrip structure was also proposed,which was based on deformation geometry of traditional left-handed material.When the designed antenna was filled with the MTM cover,its operating frequencies were shifted downwards.Moreover,the radiation pattern was improved well.Simulation results by HFSS and Matlab show that this MTM has double frequency bands(2.7-4.9 GHz and 5.0-5.5 GHz) with characteristics of negative permittivity and negative permeability.When the MTM is loaded into the microstrip patch antenna operating at 2.66,3.67,4.66 and 5.49 GHz,the operating frequencies decrease by 140,140,210 and 270 MHz,respectively.With so many good characteristics,this novel MTM antenna can be applied in practical WLAN or WIMAX communication.