一种应用于WLAN/WiMAX的双频天线  

A dual-frequency antenna for WLAN/WiMAX applications

作　　者：常舒 李迎松[1] 杨晓冬[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2011年第6期20-24,共5页Applied Science and Technology

基　　金：国家自然科学基金资助项目(60902014)

摘　　要：文中设计了一种应用于WLAN和WiMAX的双频微带天线,天线采用共面波导馈电,由2个伞形偶极子贴片产生2个带宽,该天线印刷在尺寸为20 mm×30 mm×1.6 mm、介电常数为2.65的聚四氟乙烯介质基板上.利用高频结构仿真软件HFSS对所设计的天线进行仿真和分析,通过对影响天线性能的关键参数进行研究和分析,并对该天线进行优化,得出该天线的具体尺寸.仿真和实验结果表明,该天线的-10 dB的阻抗带宽分别为1 700 MHz（2.3~4 GHz）和1 000 MHz（5~6 GHz）,能够满足WLAN（2.4~2.484 GHz/5.15~5.35 GHz/5.725~5.825 GHz）和WiMAX（2.5~2.69 GHz/3.4~3.69 GHz/5.25~5.850 GHz）的通信需求以及低端UWB通信需求.该天线结构简单,体积小,在工作带宽内有很好的全向辐射特性和较高的增益.A dual-frequency microstrip antenna applied in WLAN/WiMAX is presented.The proposed antenna adopts CPW-fed structure and comprises two umbrella-shaped dipole pasters which can produce two resonance frequencies.The antenna was printed on a poly tetrafluoroethylene substrate with dimensions of 20mm×30mm×1.6mm and relative dielectric constant of 2.65.The key parameters were simulated,analyzed and optimized using the high frequency structure simulator（HFSS）,thereby getting concrete dimension of the antenna.The simulated and experimental results demonstrate that the-10 dB impedance bandwidths of the antenna are 1 700 MHz（2.3~4 GHz）and 1 000 MHz（5~6 GHz）,respectively,which can meet the requirements of WLAN（2.4-2.484 GHz/5.15-5.35 GHz/5.725-5.825 GHz）and WiMAX（2.5-2.69 GHz/3.4-3.69 GHz /5.25-5.850 GHz）bands and lower UWB applications.The proposed antenna has simple structure,small size,and good omnidirectional radiation characteristics and high gain in the operating bands.

关 键 词：双频天线 无线局域网(WLAN) 宽带互通微波接入(WiMAX) HFSS仿真 

分 类 号：TN821[电子电信—信息与通信工程]