| 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23～
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。 |
| 关键词: 微带天线 八木天线 电磁带隙 相对带宽 |
| DOI： |
|
| 基金项目:广西自然科学基金资助项目（0832062） |
|
| A Microstrip Yagi Antenna with Electromagnetic Band-gap Ground Plane |
| ZENG Wen-bo,ZHAO Jia,HUANG Qing-nan |
| (Electronic Information & Control Engineering Department,Guangxi University of
Technology,Liuzhou 545006,China) |
| Abstract: |
| A microstrip Yagi antenna that employs a 2-D EBG(Electromagnetic Band-gap) groun
d plane as the
reflector is presented in this paper. The EBG structure has been designed and st
udied. With the aid of HFSS software, the antenna is designed and optimiz
ed so that its resonance frequency is within the band-gap frequency of the EB
G ground plane, therefore the antenna gain is enhanced and the impedance bandwi
dth is extended effectively. Measurement results show that the S11 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 re
flector achieves a relative bandwidth of 12% and a peak gain of 8 dBi respective
ly. The research presented in this paper has a good reference value for the desi
gn of planar high gain antennas. |
| Key words: microstrip antenna Yagi antenna electromagnetic band-gap(EBG) relative bandwidth |
《电讯技术》编辑部 