一种采用电磁带隙结构地板的微带八木天线  

A Microstrip Yagi Antenna with Electromagnetic Band-gap Ground Plane

作　　者：曾文波[1] 赵嘉[1] 黄庆南[1] 

机构地区：[1]广西工学院电子信息与控制工程系,广西柳州545006

出　　处：《电讯技术》2011年第6期125-129,共5页Telecommunication Engineering

基　　金：广西自然科学基金资助项目(0832062)~~

摘　　要：提出了一种采用二维电磁带隙结构地板为反射器的微带八木天线。对所构造电磁带隙结构的电磁传输特性进行了研究,通过HFSS仿真和优化,使所设计天线的谐振频率落在电磁带隙地板阻带范围之内,有效地提高了天线的增益和阻抗带宽。实测结果表明,在2.3～2.75 GHz频率范围,所设计天线的回波损耗S11≤-10 dB,其阻抗相对带宽为18%,最大辐射方向增益达10.1 dBi,而相同结构但采用普通金属地板为反射器的对比天线,其阻抗相对带宽为12%,增益为8 dBi。研究结论对平面、高增益天线的设计具有很好的参考价值。A mierostrip Yagi antenna that employs a 2- D EBG（ Electromagnetic Band- gap） ground plane as the reflector is presented in this paper. The EBG structure has been designed and studied. With the aid of HF- SS software, the antenna is designed and optimized so that its resonance frequency is within the band - gap fre- quency of the EBG ground plane, therefore the antenna gain is enhanced and the impedance bandwidth is ex- tended effectively. Measurement results show that the Su of the proposed antenna prototype is less than 10 dB over 2.3 - 2.75 GHz with a relative bandwidth of 18% and a peak gain of 10.1 dBi at bore - sight, while the contrast antenna using a normal metal ground plane as the reflector achieves a relative bandwidth of 12% and a peak gain of 8 dBi respectively. The research presented in this paper has a good reference value for the design of planar high gain antennas.

关 键 词：微带天线 八木天线 电磁带隙 相对带宽 

分 类 号：TN823[电子电信—信息与通信工程]