一种新型零阶谐振天线小型化设计-信息工程大学学报.PDF

Vol. 13 No.2 信息工程大学学报 第 13 卷第 2 期 2012 年 4 月 Journal of Information Engineering University Apr.2012 一种新型零阶谐振天线小型化设计 曹召焕，邢锋，雷雪 (信息工程大学信息工程学院，河南郑州 450002) 摘要:利用负介电常数传输线结构设计了一种新型的小型化零阶谐振天线。天线采用背馈形 式，消除了复杂的匹配网络，减小了天线的整体尺寸。通过嵌入4 个正方形结构，在天线整体 尺寸不变的情况下，进一步降低了天线的谐振频率。天线的最小谐振频率为1.95GHz ，相对带 宽为 2.719岛，与普通微带天线相比，天线尺寸减小了 85% 。天线的实物测试结果和仿真结果 吻合良好。 关键词:负介电常数传输线;小型化;零阶谐振;Bloch-Floquet 理论 中图分类号:TN82 文献标识码:A 文章编号:1671 -0673(2012)02 -0196 -04 Design of a Novel MiniaturÎzed Zeroth-Order Antenna CAO Zhao-huan , XING Feng , LEI Xue (Institute of Information Engineering , Information Engineering University , Zhengzhou 450002 , China) Abstract: A novel miniaturized zeroth-order antenna based on epsilon negative transmission line structure is proposed. With feeding in back form , its feeding network is minimized by using a prop- erly located coaxial and the overall size of the antenna is reduced. Resonant frequency of the anten- na is further reduced by four embedded square structures when the overall dimensions of the antenna remain the same. The minimum resonant frequency is 1. 95GHz and the relative bandwidth is 2. 71 % . Compared to conventional microstrip antenna , its area is reduced by 85 %. The simulated and measured results agree veη， well. Key words: epsilon negative transmission line; miniaturization; zeroth-order resonato r; Bloch-Flo- quet theo巧 0 引言 随着无线通信技术的发展，移动便携设备的使用日益增多，设计出体积小、质量轻、低剖面、价格便宜 的无线移动设备是人们的迫切需求[IJ 。微电子技术和信号处理技术的使用使得这些设备变得越来越小， 而且功能也比原来的更加强大，但是天线作为无线移动设备的电波收发单元，却无法应用这些技术实现小 型化，天线的小型化成为移动便携