一种宽带天线的研究与设计  

Design and study of wide band antenna

作　　者：白玉[1] 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,哈尔滨150001

出　　处：《计算机应用研究》2011年第10期3881-3883,3890,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(60902014);黑龙江省自然科学基金资助项目(QC2009C66)

摘　　要：为了满足宽带通信的需求,利用U形单极子天线和两个U形寄生辐射元的方法,设计了一种共面波导馈电的宽带天线,其阻抗带宽达到85%。所设计的天线印刷在尺寸为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。为了满足无线局域网(WLAN)和全球互联微波接入(WiMAX)的工作需要,抑制不需要的信号,在U形单极子辐射元之间插入一条调谐微带线,产生一个陷波特性,使所设计的天线满足WLAN、WiMAX和低端UWB通信需求。利用高频结构仿真软件HFSS对影响天线性能的主要参数进行仿真、分析和优化,得到天线的优化尺寸,并对优化的天线进行制造和测试。实验结果表明,该天线比传统微带贴片天线性能有了较大的提高,证明了利用共面波导馈电和寄生技术设计宽带天线的可行性和有效性。This paper presented a coplanar waveguide-fed wideband antenna to meet the requirement for wideband applications.The antenna consists of a U-shaped monopole and two parasitic U-shaped elements and the impedance bandwidth is about 85%.The proposed antenna was printed on 20 mm×30 mm×1.6 mm polytetrafluoroethylene with relative dielectric constant 2.65.To meet the requirement of wireless area network and the WiMAX,reduce the interference of un-required signal,inserted a microstrip stub in the middle of the U-shaped radiation patch which produced a notch band.And the proposed antenna could meet the demand of WLAN,WiMAX,and lower band of UWB.The key parameters are simulated,analyzed and optimized using high frequency structure simulator（HFSS）.The optimized dimensions of the antenna are obtained,fabricated and tested.The results show that the preference of the proposed antenna can be greatly improved compared to traditional microstrip patch antennas,and the feasibility and effectiveness of the CPW feed and the parasitic technology in designing wideband antenna is also verified.

关 键 词：共面波导 宽带天线 寄生单元 微带天线 HFSS仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]