室外2.4GHz背腔式缝隙天线的设计  

Design of the 2.4GHz cavity-backed slot antenna for outdoor application

作　　者：崔勇[1] 王勇[1] 杨世武[1] 

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《北京交通大学学报》2015年第2期112-116,共5页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：中国铁路总公司科技研究开发计划项目资助(2013X012-E)

摘　　要：为了解决单极子天线不适合室外使用的问题,设计了一种适合无线终端使用的2.4GHz背腔式缝隙天线.借助数值模型结合具体设计,计算出了背腔深度的理论值,创新性的使用波导内电波传播模型分析了天线背腔深度对天线辐射的影响;利用基于有限元法的HFSS对影响天线性能的缝隙长度、背腔深度和馈电位置等参数进行了参数扫描,确定了天线的设计参数;根据仿真结果做出了实物,并进行了测试,实测与仿真结果吻合.实测结果表明：该天线在频段2.35~2.53GHz内,S11系数小于-10dB.相比普通单极子天线,设计的背腔式缝隙天线阻抗匹配性能更好,更适宜于室外环境.A cavity-backed slot antenna （CBSA） is designed, which can work at 2.4 GHz for wireless application. Firstly, according to the mathematical model and actual design, the theoretical value is calculated and analyzed. The effect on the depth of the cavity to the radiation of the antenna is studied under the wave propagation in the waveguide innovatively. And then with the help of the High Fre- quency Structure Simulator （HFSS）, the parameters such as the length of the slot, depth of the cavity and the feeding place are simulated and determined. At last, the physical antenna is made based on the simulation and tested in the anechoic chamber. The measurement results are same to the simulation re- sults which show that the Sll of the proposed Compared to the dipole, the CBSA designed is antenna is less than - 10 dB over 2.35 - 2.53 GHz better at imoedance matchinu for outdoor annlication.

关 键 词：背腔式缝隙天线 电波传播 有限元法 2.4GHz 

分 类 号：TN823[电子电信—信息与通信工程]