一种圆极化可重构微带天线的设计  

Design of a circular polarization reconfigurable microstrip antenna

作　　者：杨虹[1] 周小莉[1] 向高林[1] 

机构地区：[1]重庆邮电大学光电工程学院,重庆400065

出　　处：《电子元件与材料》2013年第5期34-38,共5页Electronic Components And Materials

基　　金：重庆市教委科学技术研究基金资助项目(No.KJ100512);重庆市自然科学基金资助项目(No.CSTC 2010BB2412);重庆市大学生创新创业训练计划资助项目(No.201210617010);重庆邮电大学大学生科研训练计划资助项目

摘　　要：对圆弧寄生单元微带天线进行了理论分析，设计了一种圆极化可重构的圆形微带天线。该天线通过电控开关控制圆弧寄生单元的状态，从而实现左、右旋圆极化的转换。并利用仿真软件HFSS13．0对天线的特性进行了仿真验证。结果表明，在天线回波损耗S11〈-10dB时，该天线在频段为2．38-2．51GHz，3dB轴比带宽为30MHz，且最大辐射方向处正交极化差达20dB以上。天线的整体辐射性能良好，且结构简单易于实现，很容易在低频段匹配到50Ω，能够满足WLAN在2．4-GHz频段的要求。Microstrip antenna with an arc parasitic unit was analyzed, and a circular circular polarization reconfigurable microstrip antenna was designed. The arc parasitic unit was controlled by electronic switch, then this antenna realized the left and right circular polarization transformation. Numerical simulation was performed for the characteristics of the antenna with the software HFSS 13.0. The results show that the frequency channels of the antenna are 2.38--2.51 GHz, when return loss is less than-10 dB, what＇s more, 3 dB axis ratio bandwidth is 30 MHz and difference of orthogonal polarization is more than 20 dB. Moreover, the antenna has a very well unitary radiation character and simple configuration. It is easily matched to 50 Ωin low frequency band. Besides, it can satisfy the requirements of WLAN in 2.4 GHz frequency band.

关 键 词：微带天线 圆极化 可重构天线 谐振频率 仿真 回波损耗 

分 类 号：TM277[一般工业技术—材料科学与工程]